New website obligations for property developers: a practical checklist
Polish property developers must publish specified offer and price information on their own websites for sales covered by the Development Act. The checklist below reflects the law as checked on 5 November 2026. A maintainable website helps the team keep price history, advertisements and daily reporting in sync.
Why do these rules matter?
Buyers previously encountered vague messages such as “price on request”, which made developments difficult to compare. The new transparency rules require covered offers to present specified information more openly. Customers gain easier access to prices, while developers need reliable data, publication and reporting processes.
What does Polish law require today?
Articles 19a and 19b of the consolidated Development Act govern website disclosure and daily reporting. For a covered development, publish the information from the start of sales, or before the first qualifying reservation agreement if reservations start earlier, and keep it available until the final transfer covered by the provision. For certain other sales under Articles 3 and 4, disclosure starts when the sale is publicly announced.
Article 5a also applies to covered contracts concluded from 13 February 2026. The price of the apartment or single-family home is its usable floor area multiplied by its price per square metre. Measure the usable area under the relevant Polish Standard in force on the date of the building permit application or qualifying construction notification. See the amendment introducing Article 5a.
Mandatory information on a property developer’s website
Under the amended rules, a covered property website needs to present the required offer and price information clearly. Key elements include:
- General part of the information prospectus. Publish it for the relevant development or investment phase.
- Developer and sales-office details. Give the registered office address, or principal business address for an individual developer, the sales-office address and a way for buyers to make contact.
- Exact development location. Give the address or a precise location description, ideally supported by a useful map or site plan.
- Gross price per square metre. Display the VAT-inclusive price per square metre of usable floor area.
- Gross property price. Publish the applicable property price alongside the price per square metre. Article 5a sets the calculation for covered contracts.
- Prices of associated spaces. Show separate prices for parking spaces, storage units or other additions where they are not included in the main price.
- Other payments due to the developer. Show applicable payments the buyer must make to the developer under the transfer agreement, including VAT.
- Price-change history. Preserve the required dated history rather than displaying only the latest amount.
- Promotions. Check any separate rules on announced price reductions for the specific offer.
Update the website on the day a price or charge changes. Show the date and keep the previous published information. If the published price differs from the price offered when the contract is concluded, Article 19a gives the buyer the right to request the more favourable price.
A website is a legal requirement, not an optional extra
Publish the information on the developer’s own website. Include that website address in advertisements, announcements and sales offers directed at buyers. External listings can point buyers to the website.
Daily reporting to the central register
Under Article 19b, send the required data once a day to the minister responsible for digital affairs. The minister publishes the data on Poland’s open data portal. Validate the submission and monitor delivery failures.
Consequences of non-compliance
Missing or outdated information may breach the applicable transparency and consumer-protection requirements. The Office of Competition and Consumer Protection (UOKiK) can investigate practices that infringe collective consumer interests.
Possible consequences include:
- an inspection and request for immediate remediation,
- administrative proceedings against the development company,
- a financial penalty under the applicable consumer-protection rules.
Enforcement action can also damage trust in the developer and the investment. Required information should therefore be complete, current and easy to find — with ownership and monitoring defined inside the organisation.
What should a modern property website provide?
A modern property website should support both compliance and sales. It needs to help buyers compare units, understand availability and make contact, while giving the developer a controlled way to manage the underlying offer. Useful features include:
- Interactive SVG site plan. Let users select a building or unit directly from the development plan and see its status, price and details.
- Property search and filters. Allow visitors to narrow the offer by area, number of rooms, price, floor and availability.
- A page for every unit. Present visualisations, floor plans, technical information, position in the building and the relevant price history.
- Promotion and price-history module. Record dated price changes and calculate the required reference price consistently.
- Prospectus PDF generator. Produce current documents from controlled investment data instead of maintaining multiple manual copies.
- Integration with dane.gov.pl reporting. Validate and transmit the required offer data through the available interface, with logging and error handling.
- Offer-management panel. Give authorised staff a clear way to edit prices, availability and development stages without changing code.
How can Hypercon help?
For many developers, compliance work is also an opportunity to redesign the customer journey so the website supports property sales. Hypercon designs property websites from the ground up around structured offer data, maintainability and the applicable requirements.
Hypercon can:
- design and build property-developer websites around the required data and customer journey,
- adapt proven modules to the structure of a particular development,
- implement price lists, histories, prospectuses, search tools and reporting integrations,
- audit an existing platform and determine whether a safe adaptation or a rebuild is more appropriate.
See these ideas in our case studies for Zalewski, Propco and mEstate. Emperial also explains how an interactive map and focused campaigns supported property-development sales.
Do not leave implementation until the last minute
Assign someone to update prices on the day they change, keep the dated history and check that the daily submission succeeds. This keeps the offer consistent across the website and reporting.
The same project can improve the buying experience and strengthen trust in the development. If you need a professional implementation, contact us to discuss a solution that supports compliance, day-to-day offer management and sales.
Beyond formal compliance, the development website should generate enquiries, maintain customer interest and work with acquisition campaigns. See property-development marketing by Emperial.
Frequently asked questions
1. Do I need a website as a developer?
Yes, where the offer is subject to the amended rules. Required information must appear on the developer’s own website. External listings can link to it.
2. Does the obligation also apply to investments already in progress?
Sales already under way on 11 July 2025 had a two-month transition period. For those sales, the transition rule covered homes whose ownership had not yet transferred before that date, with disclosure from the date the information was posted.
3. Do I need to show a full history of price changes for each property?
The required dated price history must be presented alongside the current price. A timeline or table is one practical way to make it understandable.
4. Is price history just the lowest price from the previous 30 days?
No. Article 19a requires earlier price and charge information to remain available with the dates of changes. That history is not reduced to a single lowest price from the preceding 30 days. The legal treatment of a particular promotion should be assessed separately.
5. What if I do not have technical capabilities to implement such functions on the current website?
Audit the existing platform first. If it cannot support structured unit data, price history and reliable reporting without fragile workarounds, a planned rebuild may be safer and more economical.
6. Can I use PDF instead of content on the website?
A prospectus may be available as a downloadable document, but the required offer, price and cost data should also be presented clearly in the form required on the website.
7. How often do I need to update the data on the website?
Update the website on the day a price or charge changes and keep the dated history. Send the required data once a day under Article 19b.
8. How should the website support reporting to dane.gov.pl?
Article 19b requires the specified data to be sent once a day to the minister responsible for digitisation, who publishes it on dane.gov.pl. Follow the portal’s current technical instructions. Automation should include validation, delivery checks and alerts; a scheduled job alone does not confirm successful reporting.
9. Can we adapt our existing website?
Yes, if the existing platform can safely support structured unit data, dated price history and reliable reporting. Review the data model, editing permissions and error handling first. Compare the cost of those changes with a new build before deciding; the disclosure obligation does not automatically require replacing the website.
