Terms and conditions

1.1. This website, referred to in these Terms as Buildner Tools or the Site, is operated by BUILDNER, SLU, a company established under the laws of the Principality of Andorra, registration number 715322-T, with its registered address at Carretera Mas de Ribafeta 6, 3-1, Arinsal, La Massana, AD400, Andorra. In these Terms, we, us, and our mean BUILDNER, SLU.

1.2. The Site is affiliated with buildner.com and operates as a separate tools website. Its separate operation does not make it a separate legal entity from the operator identified above.

1.3. These Terms apply only to this Site and its calculators, utilities, artificial intelligence features, accounts, profiles, upload and storage functions, explanatory materials, previews, and exports, together the Service. Each calculator or utility, including an AI-assisted utility, is a Tool.

1.4. Other Buildner websites, competitions, courses, subscriptions, publications, reviews, and services have their own applicable terms. These Terms do not govern those services or change your rights or obligations under their contracts. Shared branding, ownership, links, or technical infrastructure do not combine the services into a single offering.

1.5. The Site's separate Privacy Policy explains its handling of personal data. These Terms describe permitted use and the functional processing needed to operate the Tools; they are not a privacy policy or consent to marketing, tracking, or unrelated use of your information.

1.6. If we introduce additional terms for a particular Tool, we will identify them and make them available before they apply. An expressly agreed, more specific provision takes priority only for the subject it addresses. Mandatory legal rights always take priority.

1.7. These Terms cover both features currently available and the account, profile, storage, and AI functions described here when offered. A provision concerning a particular feature applies when that feature is available and you use it. Describing a feature in these Terms does not promise a launch date, guarantee access to it, or mean that it is available in every location or account.

2.1. By selecting an acceptance control, or using the Service after being given clear notice of these Terms and a reasonable opportunity to read them, you agree to these Terms to the extent that a binding agreement can be formed in that way under applicable law. If you do not agree, do not use the Service.

2.2. The Service is intended for adult architecture and design students, educators, architects, designers, and other people who need practical assistance with preliminary calculations, drawing preparation, visual comparison, and presentation workflows. You do not need a professional qualification to use the Tools, but using them does not qualify you to undertake regulated professional work.

2.3. You must be at least 18 years old and legally capable of entering into this agreement. The Service is not offered for independent use by children.

2.4. If you use the Service for a business, practice, institution, or other organisation, you confirm that you have authority to accept these Terms on its behalf. In that case, references to you include that organisation where appropriate. If you lack that authority, do not accept these Terms on its behalf.

2.5. A Consumer is a person entitled to consumer protection under applicable law. A Business User is a user acting for purposes relating to their trade, business, craft, profession, or institutional activities and who is not entitled to consumer treatment for that use. Your legal status depends on the circumstances and applicable law, not simply the label used in these Terms.

3.1. The Service provides self-service digital utilities that calculate, analyse, transform, generate, organise, or display information you supply. Depending on the feature, this may include dimensions, units, quantities, room names, areas, percentage allowances, target values, drawing scales, paper settings, images, drawings, documents, project materials, text prompts, instructions, and display or export settings. Accounts may also hold the information, profile details, preferences, and saved work needed for their functionality.

3.2. Available functions may include area budgeting, equal spacing, scale conversion, sheet-fit checking, print-resolution checking, and drawing overlays. The Tools available at a particular time, their supported formats, and their operating limits are described on the Site.

3.3. The Service may calculate values, create diagrams and previews, compare supported images visually, generate or transform content using AI, and produce downloadable files. These results, including figures, schedules, text, graphics, images, and exports, are referred to as Outputs. Available account features may let you upload, organise, save, retrieve, and reuse Inputs and Outputs.

3.4. The Service works with the information and assumptions available to the relevant Tool. It does not independently inspect a site, measure an actual building, establish the authenticity of a drawing, or verify your source information. An AI feature may analyse materials you provide, but this does not constitute a complete or professionally verified review of your project.

3.5. Examples, default values, suggested settings, and sample files illustrate how a Tool works. They are not requirements, recommended specifications, or confirmation that a setting is suitable for your circumstances.

4.1. The Tools are currently available without a charge from us. You remain responsible for your own internet, device, printing, software, and other third-party costs.

4.2. Free availability is not a promise that the Service, every Tool, or every feature will remain free indefinitely. We reserve the right to introduce charges for future access or use, including one-off fees, subscriptions, AI requests or credits, account or storage allowances, paid exports, premium features, or business licensing. We may also change which features are included in a free offering.

4.3. Before you incur a charge, we will clearly disclose the relevant price, currency, applicable taxes, billing basis, and material purchase conditions. For a subscription, this includes its duration, renewal arrangements, and how to cancel. Any applicable withdrawal, refund, and digital-service rights will also be explained before purchase.

4.4. We will not retrospectively charge for use that was free when it occurred. Using a free Tool does not authorise a payment, create a paid subscription, or give us permission to charge a payment method held in connection with another Buildner service.

4.5. Moving you to a paid offering requires your express agreement to that purchase and its applicable terms. If you do not agree, you may stop using the affected offering and continue using any free functions that remain available.

4.6. Introducing charges does not itself withdraw the permitted rights in Outputs you lawfully created and downloaded while the Service was free. Existing paid commitments, if any, remain subject to the terms agreed for them and applicable law.

5.1. Subject to these Terms, we grant you a limited, non-exclusive, non-transferable permission to access and use the Service through its intended interfaces for your own lawful personal, educational, and professional work. This permission lasts while the relevant Service is available to you and may be restricted or terminated in accordance with these Terms.

5.2. You may use the Tools to assist with work for your employer or clients and may include permitted Outputs in your own project materials. Charging a client for your professional work is permitted; selling access to our Tools or passing off the Service as your own is not.

5.3. This permission does not include a right to copy, host, distribute, sublicense, embed, white-label, or resell the Service or to provide it as a competing or substitute service. A separate written agreement is required for those activities.

5.4. You may keep a copy of these Terms for your records. Normal browser caching, accessibility functions, and other acts necessarily incidental to permitted use are allowed. Rights that applicable law or a separate open-source licence grants you are unaffected.

6.1. Some features require an account, sign-in, or completion of a profile. You may use those features only through an account you are authorised to access. Creating an account does not guarantee access to every Tool, a particular storage allowance, or a future feature.

6.2. Provide accurate information where it is required for account operation, eligibility, or communication, and keep that information reasonably up to date. Do not impersonate another person or organisation or misrepresent your identity, age, authority, qualifications, or professional status.

6.3. Protect your password, sign-in links, authentication codes, and connected sign-in methods. Use available security controls appropriately, keep recovery details current, and sign out on shared devices. We may request reasonable verification before granting access, recovering an account, changing its ownership details, or acting on a closure request.

6.4. Tell us promptly at contact@buildner.com if you suspect unauthorised account access or disclosure of your sign-in details, and take reasonable steps to secure your account. You are responsible for activity you authorise and, to the extent applicable law provides, activity caused by your failure to take reasonable care. You are not automatically responsible for every action taken through a compromised account or for a security failure for which we are legally responsible.

6.5. Unless a feature expressly supports shared or organisational access, an account is for its registered user. Do not sell, transfer, rent, or share personal sign-in credentials or give another person access in order to bypass limits or restrictions. Use any supported invitation or permissions controls when authorising another user.

6.6. A profile may hold information you provide about yourself, your work, or your preferences. A profile or account label is not verification of professional registration, qualifications, identity, or the quality of your work unless a specific verification is expressly described. You must not suggest otherwise.

6.7. If a feature offers a public profile, shared workspace, or public project page, the relevant controls will explain what is visible and to whom. Check those settings before adding materials or enabling access. Creating an account or uploading a file does not, by itself, grant permission to use your private project materials in a public gallery, testimonial, or advertising campaign.

6.8. If you join a workspace expressly managed by an employer, institution, or another organisation, its authorised administrator may have the access and management powers stated for that workspace. Confirm that you are entitled to place the materials there and that the stated permissions are appropriate. An organisation does not gain control of a personal account merely because you use its email domain, unless an applicable managed-account arrangement has been clearly disclosed and validly agreed.

6.9. An account or sign-in method associated with another Buildner service may be used here only where the Site offers that option. Shared sign-in does not make these Terms the terms for that other service, combine separate purchases, or authorise payment using an arrangement made elsewhere.

6.10. Do not create duplicate or automated accounts to evade restrictions, obtain allowances dishonestly, or restore access after a justified suspension without permission. We may take proportionate steps to verify eligibility, investigate misuse, and protect account access in accordance with these Terms.

6.11. Account messages about sign-in, security, stored materials, important Service changes, or account closure may be sent to your registered contact address or through the Service where legally appropriate. Keep that address accessible. These operational communications do not constitute permission to send unrelated marketing.

7.1. Inputs means the information, files, drawings, images, documents, text, prompts, instructions, settings, and other materials that you enter, select, import, upload, save, or otherwise make available through the Service. Your account and profile details are also covered by your duties to provide accurate and authorised information. Rules concerning personal data are set out in the separate Privacy Policy and applicable law.

7.2. You retain the ownership and other rights you already hold in your Inputs. Using the Service does not transfer ownership of your designs, drawings, or project materials to us.

7.3. You must have the necessary rights, permissions, and authority to use your Inputs with the Service and to create, use, and share resulting Outputs. This includes any relevant permission from a client, employer, collaborator, copyright owner, or other rights holder.

7.4. You must not provide materials in breach of intellectual property rights, a confidentiality duty, a contractual restriction, a court order, or applicable law. Before processing or storing confidential project materials, confirm that the feature's stated operating method, including any remote storage or AI processing, is permitted by your obligations to the owner of those materials. The Service is not a facility for classified information or materials requiring a specially agreed regulated hosting arrangement unless we have expressly agreed that arrangement with you.

7.5. You are responsible for selecting the correct source files, checking that Inputs are complete and accurate, using consistent units and dimensions, and reviewing the settings before relying on or exporting a result.

7.6. Use any dedicated sign-in, payment, or verification interface only for its stated purpose. Do not place passwords, authentication tokens, payment-card information, identification documents, or unrelated sensitive information in project files, profile descriptions, AI prompts, or support messages. Do not assume a Tool removes personal information, hidden content, or identifying metadata from an Output unless that function is expressly stated.

7.7. You are responsible for the decisions you make using the Service and for the project materials you issue to others. These responsibilities do not remove any obligation or liability that the law places on us.

8.1. By using a feature, you authorise the technical operations reasonably needed to provide it. Depending on the feature, these may include receiving and reading files, storing and retrieving account information and project materials, creating working copies and backups, organising or indexing saved work, extracting text or image information, applying calculations, rendering previews, combining image layers, submitting relevant Inputs to an AI model, and generating or saving Outputs.

8.2. Where a Tool states that processing takes place locally in your browser or on your device, selecting or opening a file in that Tool does not, by itself, mean the file has been uploaded to us. That local-processing description applies to the stated Tool function, not automatically to all website activity or to an external service you choose to use.

8.3. Upload, account-storage, and remotely processed AI functions may transmit relevant information and materials to systems operated by us or our hosting, storage, and AI providers. An Input processed locally is not necessarily kept local if you subsequently choose to save it online, send it to an AI feature, or share it through the Service. The feature's description and controls will identify the relevant operating method.

8.4. To the extent a legal licence is needed, you grant us a non-exclusive, worldwide, royalty-free permission to host, store, reproduce, organise, technically adapt, transmit, analyse, and display your Inputs only as reasonably necessary to operate the features you use, provide requested support, maintain the security and integrity of those features, and comply with applicable legal obligations. The worldwide scope allows distributed technical infrastructure; it does not override applicable restrictions on international transfers of personal data.

8.5. We may extend that limited permission to hosting, storage, AI, and other technical providers only to the extent necessary for their role in supplying those functions. The licence does not give those providers a general right to sell, publish, or independently exploit your materials. Access by our staff or providers is limited to the permitted service, support, security, and legal purposes; these Terms do not authorise unrelated examination or use of your work.

8.6. This permission does not authorise us to sell your Inputs, publish your unpublished work except through a sharing function you choose to use, use your work in advertising, enter it into a competition, or use it to train a general-purpose artificial intelligence model. Operating an AI feature on your instructions is different from training a model on your materials. Any additional use requires a separate lawful basis and, where a licence or consent is required, a separate agreement or consent.

8.7. The permission lasts for the period needed to supply the features you use, including the storage of materials you choose to keep in your account, and for any limited period needed to complete deletion, maintain lawful restricted backups, handle a dispute, or meet a legal obligation. It does not create a general right to exploit your project materials after those purposes end. Personal-data retention details belong in the separate Privacy Policy.

8.8. If a new function materially changes the processing of your materials, such as sending a previously local file to a remote service, we will explain that change before you use the function and obtain any agreement or consent required by law. Creating an account alone does not authorise publication of your project files or submission of every stored file to every AI feature.

9.1. As between you and us, you retain the rights in your Inputs that are reflected in an Output. We do not claim ownership of your original project work merely because a Tool helped calculate, display, compare, or export it.

9.2. To the extent an Output contains material owned by us that is intentionally included by an authorised export function, we grant you a non-exclusive, worldwide, royalty-free, continuing licence to use, reproduce, and adapt that material as part of the Output for your lawful projects and to share those project materials with clients, collaborators, educators, and other intended recipients. Any clearly disclosed asset-specific restrictions remain applicable.

9.3. That permission does not allow you to extract and commercialise our software, branding, interface, template library, or other Service materials as a standalone product or service. It does not grant rights in third-party materials that you are not otherwise entitled to use.

9.4. You may edit an Output, but you must not falsely represent an edited or unedited Output as certified, independently checked, professionally approved, or endorsed by us. Use of the Service does not make us the author, designer, architect, engineer, or approving authority for your project.

9.5. Outputs may be similar to those produced for other users. We do not promise exclusivity, originality, copyright protection, registrability, or freedom from third-party rights. Numerical results, formulae, and other factual material may not be capable of exclusive ownership.

9.6. Before distributing an Output, review its accuracy, completeness, formatting, permissions, and suitability for the intended recipient and use. Download and retain your own copy where needed.

9.7. To the extent we acquire any transferable intellectual property rights specifically in AI-generated content produced for you through your authorised use of the Service, we assign those rights to you. This does not transfer our software, models, templates, branding, pre-existing materials, or third-party rights. It does not promise that an AI Output attracts intellectual property protection or that you can exclude other users from independently receiving similar content.

9.8. If an Output reproduces third-party content, you remain responsible for obtaining any permission needed for your intended use. An AI response cannot grant you someone else's rights or confirm a licence merely by saying that content is free to use.

10.1. The Service provides general calculation, visualisation, and workflow assistance. It does not provide project-specific architectural, engineering, surveying, planning, building-control, legal, financial, valuation, or other regulated professional advice.

10.2. Using the Service does not create a professional appointment, consultancy engagement, fiduciary relationship, or duty to supervise your project. We do not undertake to inspect, approve, certify, sign off, or monitor your work through the Service.

10.3. Do not use an Output as the sole basis for construction, fabrication, installation, procurement, a regulatory submission, a contractual commitment, or a decision affecting health, life, safety, or material property interests. Obtain independent checks and appropriately qualified professional advice before those uses.

10.4. You remain responsible for checking applicable laws, building regulations, planning requirements, accessibility standards, fire and structural requirements, professional obligations, project specifications, and contractual requirements. A Tool result does not establish compliance with any of them.

10.5. A status such as “fits”, “within target”, “meets target”, or a similar indicator relates only to the particular calculation and settings described by the Tool. It is not a general statement that your work is safe, compliant, complete, suitable for construction, or acceptable to a client or authority.

10.6. Using the Tools does not submit work to, register you for, or secure acceptance by any competition, course, publication, or other service. You must independently meet the requirements of any destination to which you later submit your work.

11.1. Results can be affected by incomplete or incorrect Inputs, formula assumptions, rounding, numerical precision, unit conversion, software errors, browser behaviour, and the limits of the relevant method. Check important results independently, including by a separate calculation where appropriate.

11.2. Area budgets. Area calculations and allowances reflect the room data, quantities, percentage bases, and targets entered. They do not establish a measured or legally recognised floor area, compliant occupancy, a construction cost, a project valuation, or the adequacy of circulation, walls, services, or facilities. Check how each allowance is calculated and avoid omissions or double counting. A default allowance is not a professional recommendation.

11.3. Equal spacing and layout. Spacing results describe the selected geometry and margin rules. They do not assess structural spans, fixings, loads, manufacturing tolerances, material movement, installation tolerances, minimum clearances, or regulatory requirements. A dimensioned diagram may be illustrative and may not be displayed or printed at actual size.

11.4. Scale conversion and sheet fit. These Tools depend on the dimensions, scale, orientation, margins, and paper settings supplied. A predicted fit does not account for every printer's printable area, cropping, bleed, driver settings, or application scaling. Verify a known dimension on the final print and check settings such as “fit to page” before issuing a scaled drawing.

11.5. Print resolution. A pixels-per-inch result or resolution target is a numerical check. It does not guarantee sharpness, legibility, colour accuracy, image quality, printer compatibility, or satisfactory physical output. Changing a target resolution does not add image detail. Source quality, compression, paper, printing method, viewing distance, and other factors remain relevant. Confirm specifications with your print provider.

11.6. Drawing overlays. An overlay is a visual comparison aid, not an exhaustive change detector, document audit, clash check, or verification of drawing completeness. Matching pixel dimensions alone do not establish matching scale, crop, alignment, or content. Differences may be obscured by colour, transparency, line weight, compression, resolution, or display settings. An apparently unchanged area is not proof that no change exists. Review the original documents and any revision schedule independently.

11.7. Exports. An exported image, diagram, or schedule may flatten information, use rounded display values, or render differently in another application. Check the actual downloaded file, including its dimensions, units, orientation, values, and readable content, before printing, sharing, or submitting it.

11.8. Tool-specific instructions and warnings form part of the description of that Tool's capabilities. They do not expand the Tool into functions it does not expressly provide.

12.1. Some Tools use artificial intelligence or machine-learning systems, including systems supplied by third-party providers. Depending on the feature, AI may analyse uploaded materials, extract information, respond to prompts, generate suggestions, or create and modify text, images, diagrams, or other content. An interaction with an AI feature is not an interaction with a human professional. We will identify AI interaction and AI-generated or manipulated content where required by applicable law.

12.2. To provide the AI function you choose, relevant prompts, instructions, files, selected saved materials, and contextual information may be transmitted to and processed by the AI systems supporting that function. The functional permissions in section 8 apply. Do not submit client or other restricted materials unless you are authorised to use them in that manner. Using an AI feature does not authorise unrelated model training or blanket processing of every file in your account.

12.3. AI Outputs can be incorrect, incomplete, misleading, outdated, biased, or internally inconsistent even when they appear confident, precise, or persuasive. They may invent facts, citations, measurements, quantities, regulatory references, materials, or features that are not present in your Inputs. AI may also overlook information, misread a drawing, misunderstand scale or symbols, or fail to follow an instruction.

12.4. Review every AI Output before relying on it, saving it as an approved result, sharing it, or taking action. Verify relevant facts and references against authoritative sources and independently check calculations, dimensions, specifications, and regulatory statements. Use appropriately qualified human judgment for project decisions. A request to “check”, “verify”, or “make compliant” does not turn an AI response into a professional verification or certification.

12.5. AI results are not a substitute for the independent checks required by sections 10 and 11. Do not rely on an AI feature as the sole basis for construction, fabrication, installation, safety decisions, regulatory approval, or a binding professional or commercial commitment. The Service is not designed to make consequential eligibility or suitability decisions about individuals.

12.6. AI Outputs can vary between requests, even when the Inputs appear identical. Changes to a model, provider, settings, or available context may change results. We do not guarantee a particular model will remain available, an exact Output can be reproduced, or a generated result will be unique, protectable, non-infringing, or suitable for your particular project. Your rights in Outputs are addressed in section 9.

12.7. A successful AI request means only that the system has returned a response; it does not confirm that the requested task was completed correctly. A response saying that a file was saved, a calculation checked, or another action completed is not independent proof of that action. Check the relevant file, result, or Service confirmation. Review proposed changes before applying them to original materials or important work.

12.8. You must not use AI-generated content to fabricate qualifications, approvals, inspections, project evidence, or another person's statements. Do not represent a generated image as proof that a depicted building, condition, material, or completed project actually exists when it does not. Make any disclosure of AI use required by applicable law or by the rules of the client, institution, competition, or platform to which you submit the work.

12.9. Do not remove or defeat a disclosure, provenance marker, or technical marking where retaining it is required by law or a clearly disclosed lawful condition of the relevant feature. We remain responsible for transparency or marking obligations that the law places on us; this section does not transfer those obligations to you.

12.10. AI features may apply limits on requests, file sizes, processing time, context length, or available functions. Requests may fail, be delayed, be refused, or produce only a partial result. Do not evade reasonable safeguards or usage limits. Any future charge, credit arrangement, or paid usage allowance must be disclosed and agreed as described in section 4; an unsuccessful request does not remove any remedy required by law or an agreed purchase term.

12.11. Third-party AI systems may be updated or replaced as part of maintaining the Service, subject to our obligations concerning functionality, notice, and the permitted use of your materials. A provider's involvement does not enlarge the licence you grant us or excuse obligations we owe you. Material changes to how your files are used will be handled under section 8 and applicable law.

13.1. You are responsible for providing a compatible device, browser, internet connection where required, and sufficient processing capacity and storage. Support for particular devices, browser versions, file formats, file sizes, and export types may vary.

13.2. A file extension or successful import does not guarantee that a file is valid, complete, safe, correctly interpreted, or suitable for the requested operation. Keep original files and work from copies where appropriate.

13.3. Where account storage is available, you may upload and save supported materials for later use within the feature's stated limits. Storage capacity, supported formats, maximum file sizes, version history, and retention arrangements depend on the function or offering described on the Site. Free access does not promise unlimited or permanent storage.

13.4. A file selected on your device, a displayed preview, or an AI response appearing on screen is not proof of a successful upload or save. Check the relevant completion indication and that a saved item can be retrieved. Closing a tab, refreshing a page, clearing browser data, changing devices, a software update, a browser crash, or a technical failure may cause unsaved work to be lost.

13.5. Hosted storage is a convenience for using the Service and is not a substitute for your own independent backups. We do not promise a particular backup frequency, recovery point, version history, or restoration service unless expressly offered or required by law. We do not undertake to recover local materials we never received. These limits do not exclude responsibility that applicable law places on us for a failure of a storage function we have agreed to provide.

13.6. Features that alternate or blink between drawings are optional viewing aids. Stop using such a feature if it causes discomfort and use a static comparison instead.

13.7. You may manage or delete stored materials through the available controls or contact us for assistance. Deleting a project, closing an account, or changing access permissions may make related files, working copies, links, and saved Outputs unavailable. Do not delete your only copy of materials you need. The rights to retrieve content that applicable law gives you remain unaffected.

13.8. We may reject, quarantine, or remove materials that are unlawful, infringe rights, contain harmful code, exceed disclosed limits, or otherwise breach these Terms. We may also remove materials in response to your deletion request, account closure, a lawful order, or discontinuation of a storage feature in accordance with these Terms.

13.9. Before a planned storage reduction, closure of a long-unused free account, or discontinuation that would remove lawfully stored materials, we will give reasonable advance notice and an opportunity to download available materials or keep an eligible account active. Urgent legal or security action may require a shorter period or prevent access to particular materials. Any mandatory notice period, right to retrieve content, or other remedy takes priority.

13.10. Account closure or deletion does not necessarily erase every lawful backup or record immediately. Any remaining copy is subject to restricted purposes and the limited permission in the processing section. These Terms do not establish an indefinite right to retain or reuse your work.

13.11. If a feature allows sharing, collaboration, or public display, check the stated audience and permissions before enabling it. Your choice authorises us to make the selected materials available to that audience for that purpose. A recipient may keep a copy they have lawfully obtained; disabling a link does not itself recall copies already downloaded. Public or shared access does not transfer ownership or grant rights beyond the permissions you validly provide and applicable law.

14.1. You must not, and must not assist another person to:

• use the Service unlawfully, fraudulently, deceptively, or in breach of another person's rights;
• copy, republish, distribute, sell, rent, sublicense, white-label, or commercially offer access to the Service without our written permission;
• clone or reproduce protected parts of the Site, including its software, visual assets, interface, documentation, or organised content, to build a substitute or competing offering;
• frame, embed, mirror, proxy, or integrate the Service into another website or product without authorisation;
• scrape, crawl, harvest, or systematically extract protected materials or Service results, manually or automatically, to create a database, dataset, content feed, model-training corpus, or competing service without permission;
• access the Service through unauthorised scripts, bots, headless browsers, bulk requests, or undocumented interfaces;
• bypass or interfere with access controls, payment requirements, limits, blocks, security measures, or restrictions, including by rotating accounts, identities, devices, or network addresses;
• exploit a bug, vulnerability, exposed credential, or configuration error to obtain unauthorised access, free paid functionality, another person's materials, or an unfair technical advantage;
• introduce malware or harmful code, conduct denial-of-service activity, or send Inputs designed to disrupt the Service or consume unreasonable resources;
• probe, scan, or test security without authorisation, except where a published security programme or applicable law expressly permits the activity;
• access, change, delete, or interfere with another user's information, work, session, or access;
• create impersonating or deceptive profiles, disclose another person's private information unlawfully, or use account, upload, or sharing functions for harassment, unlawful threats, spam, or illegal content;
• bypass AI safeguards, manipulate a Tool into exposing another user's materials or confidential system information, or use prompts or uploaded files to gain access beyond your permission;
• use AI features to generate unlawful instructions, fraudulent evidence, forged professional approvals, or misleading impersonations, or to make consequential decisions about a person's eligibility, employment, credit, or access to essential services;
• decompile, disassemble, or reverse-engineer the Service except to the extent a non-excludable legal right or an applicable software licence permits it;
• remove proprietary or attribution notices from Service materials, or falsely claim ownership, partnership, certification, or endorsement;
• use the Service to facilitate plagiarism, rights infringement, forged approvals, falsified project records, or other dishonest conduct; or
• use the Service as a safety-critical control system or as the sole verification method for decisions affecting life or physical safety.

14.2. Ordinary use of permitted Outputs in your own paid professional work is allowed under sections 5 and 9. That permission does not extend to exploiting the Tools themselves as a product or service.

14.3. Accessibility software and browser assistance that a Tool expressly supports are permitted when used for your own authorised session and within the same limits as ordinary interactive use. You must review any settings, actions, or Outputs produced through that assistance. Supporting a browser assistant does not grant an unrestricted API, scraping, or bulk-processing licence.

14.4. Conventional search-engine indexing is permitted only to the extent allowed by our published crawler instructions and applicable law. It does not authorise republication of the Site or provision of its interactive functions through another service.

14.5. These restrictions do not prevent lawful criticism, an honest review, use of unprotected ideas or mathematical principles, or an act that applicable law expressly permits notwithstanding a contractual restriction.

15.1. Except for your Inputs, rights preserved in Outputs, and materials owned by others, we or our licensors retain all rights in the Site and Service, including their software, original content, graphics, designs, documentation, branding, and protected compilations.

15.2. Access without a charge does not make the Service public domain or open-source software. No ownership or licence is granted by implication beyond the permissions stated in these Terms or a separately applicable licence.

15.3. Buildner names, logos, and other brand assets may not be used in a way that suggests ownership, sponsorship, partnership, approval, or endorsement without permission. Accurate references to the Site and other uses permitted by law remain allowed.

15.4. You may share an ordinary link to a public Site page if the link is accurate, lawful, and does not misleadingly present our Service as your own. Linking does not grant a right to embed or reproduce a Tool.

15.5. If a component is supplied under an open-source or third-party licence, that licence governs the rights it grants in that component. These Terms do not reduce rights that such a licence validly grants you.

16.1. The Site may refer or link to third-party information, software, standards, print providers, or other resources. A reference is provided for context or convenience and does not, by itself, constitute an endorsement or guarantee.

16.2. External services are governed by their own terms. You are responsible for deciding whether to use them and for any commitments you make directly with their providers.

16.3. We do not control independent third-party websites, browser extensions, or services you choose to use. Their content, availability, and conduct are their responsibility. This clause does not excuse our own contractual obligations or responsibility for providers we engage to perform those obligations.

16.4. Embedded hosting or AI providers help us supply parts of the Service. Their technical limitations may affect availability, supported inputs, or results. We remain your contracting party for the Service we provide. If a feature requires you to enter into a separate agreement directly with another provider, that requirement and the relevant terms will be identified before you choose that feature.

17.1. You may contact us with questions, suggestions, error reports, or security concerns. Do not include confidential project materials unless they are necessary and you are entitled to provide them.

17.2. If you voluntarily provide a suggestion about the Service, you permit us to use and implement that suggestion without payment or attribution. This permission does not extend to ownership of your project files, personal information, or unrelated creative work included in a support request.

17.3. General support explanations do not constitute project-specific professional advice, certification, or a promise of a particular project result. We do not promise a particular response time or support service level unless expressly agreed or required by law.

18.1. We may maintain, correct, update, replace, limit, or discontinue the Service or an individual Tool for reasons including security, legal compliance, technical compatibility, correction of errors, prevention of misuse, development of the offering, or commercial sustainability.

18.2. We may apply reasonable limits on file size, stored volume, supported formats, account activity, AI requests, processing time, or other resource use. Relevant material limits will be disclosed before you commit to an affected offering. Changes affecting existing access or stored work remain subject to the notice and retrieval protections in these Terms and applicable law.

18.3. We do not promise uninterrupted operation, permanent availability of a particular Tool or version, compatibility with every environment, or implementation of a planned feature. Temporary interruptions may occur during maintenance, failures, or circumstances outside our reasonable control.

18.4. Where reasonably practicable, we will give advance notice of a material reduction or discontinuation affecting an ongoing offering. Urgent security, legal, or operational action may require a change or interruption without advance notice.

18.5. Changes remain subject to any existing contractual commitments and mandatory requirements concerning notice, continued conformity, cancellation, refunds, or other remedies. Where the law requires notice on a durable medium or a right to terminate, we will provide it.

18.6. We are not responsible for a delay or failure to perform to the extent it is caused by an event beyond our reasonable control that we could not reasonably prevent or overcome. We will take reasonable steps to limit its effect. This does not remove a statutory right to end an affected contract or obtain a remedy.

19.1. We may suspend or restrict access where reasonably necessary because of a material breach of these Terms, unlawful activity, a security risk, misuse of resources, infringement of rights, or a legal requirement. We may also end an offering in accordance with section 18.

19.2. Measures may include rejecting a file or request, quarantining or removing content, limiting AI use or uploads, disabling a sharing link or function, suspending an account, or blocking access. We will aim to make a restriction proportionate to the issue and consider its seriousness, repetition, and effect on other people. Urgent or serious threats may require immediate action.

19.3. Where lawful and reasonably practicable, we will explain the reason for a restriction and provide an opportunity to correct a remediable breach. We may withhold information where disclosure would compromise security, another person's rights, or a legal obligation. You may contact us if you believe a restriction was applied in error.

19.4. You may stop using the free Service at any time. Stopping use does not create a fee, but does not remove obligations or liabilities already arising from your previous use.

19.5. When access ends, your permission to access the affected Service ends. Rights in Outputs already lawfully obtained continue as stated in section 9, unless the particular Output was obtained unlawfully or its continued use infringes another person's rights. Provisions intended to continue, including ownership, liability, accrued claims, and dispute provisions, survive as applicable.

19.6. You may request account closure through the available account controls or by contacting contact@buildner.com. We may take reasonable steps to verify that you are entitled to close the account. Export materials you need before closure. Account closure does not transfer ownership of your materials to us, and the storage and deletion provisions continue to apply.

19.7. Content and abuse restrictions may be applied following a user report, a legal notice, security information, or checks associated with the feature you use. Where automated screening or decision-making is used, we will explain its role and the available review process in the relevant feature information or restriction notice, as required by law. These Terms do not promise that every Input, profile, or Output is checked, and do not treat passing a check as approval of its legality or accuracy.

19.8. Where required by law, we will provide a clear statement of the reasons for a content or account restriction, its scope and duration where known, the contractual or legal ground, the role of automation, and the means to challenge it. You may request review at contact@buildner.com. We will consider relevant information and provide human review where applicable law requires it. These arrangements do not limit any other available complaint or redress procedure.

20.1. The Service is supplied for the limited purposes described in these Terms and the relevant Tool. Subject to section 21.1 and mandatory law, it is provided on an “as is” and “as available” basis.

20.2. To the extent legally permitted, we give no additional warranty that the Service or an Output will be error-free, complete, continuously available, suitable for every particular purpose, compatible with every system, or capable of achieving a particular commercial, academic, design, printing, or regulatory result.

20.3. We do not guarantee that every defect will be detected or corrected, that a visual comparison will identify every difference, or that the Service will prevent loss, delay, rework, or rejection of your materials.

20.4. For Business Users, and to the extent permitted by law, implied warranties, conditions, and terms concerning satisfactory quality, merchantability, fitness for a particular purpose, and non-infringement are excluded.

20.5. For Consumers, nothing in this section excludes statutory requirements concerning conformity, reasonable care and skill, security, remedies, or binding descriptions of the Service. Describing a Tool as free, experimental, or a preview does not remove rights that the law gives you.

21.1. Liability that is not excluded. Nothing in these Terms excludes or limits liability for fraud, fraudulent misrepresentation, wilful misconduct, gross negligence, death or personal injury caused by negligence, or any other liability to the extent its exclusion or limitation is prohibited by applicable law. Nothing removes a non-excludable consumer right, statutory remedy, or right to compensation. This section takes priority over every exclusion, limitation, and indemnity in these Terms.

21.2. Matters outside our responsibility. Subject to section 21.1, we are not responsible for loss to the extent it results from inaccurate or unauthorised Inputs, use contrary to clear Tool instructions, changes made by you or an independent third party, or decisions for which the Service does not undertake responsibility. This does not exclude responsibility for our own breach or an error for which we are legally liable.

21.3. Business losses excluded. For Business Users, and to the fullest extent permitted by law, we are not liable for indirect, consequential, special, exemplary, or punitive loss, or for loss of profits, revenue, business, contracts, anticipated savings, opportunity, goodwill, or reputation. We are also not liable for loss or corruption of data, loss of use, business interruption, or wasted expenditure, whether those listed losses are direct or indirect.

21.4. Project and production consequences for Business Users. Subject to section 21.1, the business exclusions include losses from missed deadlines, rejected submissions, printing or reprinting, incorrect ordering, fabrication or construction errors, rectification work, project delay, and claims by your clients or contractors arising from reliance on an Output. These exclusions apply even if the possibility of the relevant loss was brought to our attention, to the extent permitted by law.

21.5. Business liability cap. Subject to section 21.1, our total aggregate liability to a Business User for all claims arising from or relating to the Service and these Terms is limited to the greater of EUR 100 and the fees that Business User paid us for the affected features of this Service during the 12 months immediately before the event giving rise to the first claim. For a series of related events, the first event is used. Fees paid for separate Buildner services are not included. This limit applies collectively across contractual, tort, negligence, statutory, and other claims to the extent the law permits.

21.6. Consumers. The business exclusions and cap in sections 21.3–21.5 do not apply to Consumers. Our responsibility to Consumers is determined by applicable law. Where the law permits a limitation by reference to foreseeability, we are responsible for loss that is a foreseeable result of our breach or failure to exercise the care and skill required by law, and are not responsible for loss that was not reasonably foreseeable. All mandatory rights to repair, correction, price reduction, refund, termination, or compensation remain available where applicable.

21.7. Avoidable loss and contribution. Each party must take reasonable steps to reduce a loss where the law requires it. Liability may be reduced to reflect the other party's contribution to a loss to the extent permitted by law. No clause reverses a statutory burden of proof or makes a Consumer responsible for our breach.

22.1. This section applies only to Business Users. To the extent permitted by law, you will indemnify us against reasonably incurred losses, liabilities, and reasonable legal costs resulting from a third-party claim to the extent caused by your material breach of these Terms, unlawful use of the Service, or Inputs that infringe the third party's rights.

22.2. This obligation does not apply to the extent a claim is caused by our breach, negligence, misconduct, or an alteration or use of your Inputs that you did not authorise. It does not make you responsible merely because a third party alleges wrongdoing.

22.3. We will give reasonably prompt notice of the claim, allow reasonable participation in its defence, and take reasonable steps to mitigate loss. You are not required to fund a settlement entered into without your consent, which must not be unreasonably withheld. No settlement may impose an admission, non-monetary obligation, or restriction on either party without that party's agreement.

22.4. Consumers are not subject to this contractual indemnity. Any responsibility they have for unlawful conduct or loss they cause is determined by applicable law.

23.1. Contact us using section 27 if you have a complaint, encounter a material error, believe your access was wrongly restricted, discover a security issue, or consider that material stored or made available through the Service is illegal or infringes your rights. You may also use a reporting control offered for the relevant feature.

23.2. To help us investigate, identify the relevant page, Tool, profile, file, or content location; describe the issue and why you consider it unlawful or otherwise objectionable; and provide a way to contact you. For a rights complaint, identify the protected material and explain your authority to act. For a technical error, include the approximate time and relevant settings. Submit reports in good faith, state that the information is accurate to the best of your knowledge, and share only what is necessary. Any legal exception to a requirement to identify yourself remains available.

23.3. If you discover a vulnerability, stop any activity that risks harm or unauthorised access and report it privately. Do not access another user's materials, extract data, or disrupt the Service to demonstrate the issue. A report does not itself authorise further security testing.

23.4. We will consider complaints and notices in good faith and respond as required by applicable law. We may request reasonably necessary information and take proportionate action, including correcting a Tool or restricting disputed material.

23.5. Contacting us is encouraged but is not a mandatory condition before exercising a legal right, making a regulatory complaint, seeking urgent relief, or starting proceedings. These Terms do not shorten a statutory limitation period.

23.6. Where applicable law requires it, we will acknowledge a content notice, communicate the resulting decision and available review options, and provide the legally required information about automated processing of that notice. Do not knowingly submit false reports or use the complaints process to harass another user.

24.1. We may update these Terms to reflect changes to the Service, business arrangements, applicable law, security requirements, or identified drafting errors. We will publish the revised wording with an updated date.

24.2. For a material change affecting an ongoing relationship, we will give reasonable advance notice through the Site or another appropriate channel, and obtain fresh acceptance where required by law. An urgent legal or security change may take effect sooner where permitted and necessary; we will explain it as soon as reasonably practicable.

24.3. Changes apply prospectively. They do not retrospectively impose a fee, transfer ownership of your existing Inputs or Outputs, remove an accrued claim, or rewrite a completed purchase.

24.4. If you do not agree to a revised version, stop using the affected Service before it takes effect. Continued use constitutes acceptance only where you have received legally sufficient notice and applicable law permits that method of acceptance. Rights concerning cancellation, refunds, or termination of an existing paid arrangement remain unaffected.

24.5. Introducing paid access remains subject to section 4. Posting revised Terms alone does not authorise us to charge you.

25.1. These Terms and disputes relating to the Service are governed by the laws of the Principality of Andorra, subject to mandatory rules that apply regardless of a choice of law.

25.2. If you are a Consumer, this choice does not deprive you of mandatory protections available under the law that would otherwise apply, including protections of your country of habitual residence where applicable.

25.3. For Business Users, the competent courts of Andorra have exclusive jurisdiction over disputes relating to these Terms or the Service, except where a mandatory rule requires otherwise.

25.4. Consumers may bring proceedings in any court available to them under mandatory law, including the courts of their place of residence where applicable. We will bring proceedings against a Consumer only in a court permitted by applicable law.

25.5. These Terms do not impose mandatory arbitration, waive a right to participate in proceedings where that right is protected by law, or restrict your right to complain to a competent public authority.

26.1. Entire agreement for this Service. These Terms, properly notified Tool-specific terms, and any express written agreement for this Service form the agreement concerning this Service. They do not replace contracts for other services or exclude a statement or representation that applicable law makes binding.

26.2. Severability. If a provision is invalid or unenforceable, it will not apply to the extent of that invalidity, and the remainder continues where legally possible. An unfair consumer term will not be rewritten merely to make an otherwise unlawful restriction enforceable.

26.3. No waiver. A failure or delay in enforcing a provision does not waive the right to enforce it later. A waiver of a particular breach does not waive a later breach.

26.4. Transfer. You may not transfer a licence to access the Service without our permission, except where the law permits it. We may transfer our rights and obligations as part of a lawful reorganisation or transfer of the Service, provided this does not reduce your mandatory rights or the guarantees owed to you. We will give notice where required.

26.5. No partnership or agency. These Terms do not create a partnership, employment, agency, or joint venture. Neither party may commit the other to obligations without authority.

26.6. Communications. We may provide Service notices electronically where the law permits. This does not amount to consent to marketing. Formal notices must use a method and address permitted by applicable law.

26.7. Language. These Terms are issued in English. If a translation is provided, applicable consumer-language requirements and legal rules on interpretation continue to apply; this clause does not override them.

For questions, complaints, permission requests, or notices concerning this Site:

Operator: BUILDNER, SLU
Registration number: 715322-T
Registered address: Carretera Mas de Ribafeta 6, 3-1, Arinsal, La Massana, AD400, Andorra
Site contact email: contact@buildner.com
Tools website: tools.bnr.ac

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