Since 11 July 2025, real estate developers in Poland have been legally required to run their own website with up-to-date unit prices and the full history of price changes. In 2026, a developer website costs from 5,000–10,000 PLN net (a template with an apartment search and statutory compliance) through 12,000–25,000 PLN net (a custom project with a graphical navigator, 3D floor plans and CRM integration) up to 15,000–35,000 PLN net (a corporate site with a multi-investment module). Today such a website is both a legal document and the most effective apartment sales tool a developer has.
Najważniejsze: Every developer must run their own website with gross prices for all units, price per square metre, prices of ancillary rooms and the history of price changes (Art. 19a of the Polish Developer Act, in force since 11 July 2025). UOKiK fines for breaching these information duties can reach 10% of annual turnover. In 2026 a development website costs from 5,000–10,000 PLN net (template with a faceted search) to 12,000–35,000 PLN net (custom build with a graphical navigator and CRM integration), and takes 3–5 to 8–12 weeks to deliver.
A developer website is a legal obligation since 2025
The amendment to the Polish Developer Act passed on 21 May 2025 (Dz.U. 2025 item 758) added a new Article 19a to the Act on the Protection of the Rights of Buyers of Residential Units. It requires every developer to run their own website — from the day sales start, and if reservation agreements are signed, before the first one is concluded.
The rules took effect on 11 July 2025. Developers with ongoing projects had until 11 September 2025 to adapt, for units whose ownership had not yet been transferred. The obligation lasts for the entire life of the investment — until ownership of the last unit is transferred, which in practice means keeping the website updated for years.
- The Act goes further: in advertisements, announcements and sales offers addressed to buyers, the developer must publish the address of the website where the required information is available.
What must a development website contain under Art. 19a?
- Prices of all units on offer — the gross price (including VAT) of every apartment or house.
- Price per square metre of usable floor area — for each unit.
- Prices of ancillary rooms and rights — storage units, parking spaces, garages and gardens, if not included in the unit price.
- Information on other financial obligations — amounts the buyer must pay to the developer under the ownership transfer agreement.
- Price change history with dates — every change must be shown with its date; all prices must be disclosed, not just the current one.
- The general part of the information prospectus — available in a form that allows copying and downloading.
- Address and contact details — the developer's registered office, the address of the sales office and how buyers can contact the developer.
- Location of the development — where the project is being built.
Prices and their changes must be published on an ongoing basis — in practice, a price change made in the sales system should appear on the website the same day.
What are the penalties for missing or outdated prices?
The new duties have teeth. First, if the price published on the website is lower than the price offered when the contract is concluded, the buyer may demand the contract be concluded at the most favourable price. Second, breaching the information duties constitutes a practice infringing collective consumer interests — the President of UOKiK (the Polish competition and consumer protection authority) can impose a fine of up to 10% of the turnover of the financial year preceding the fine. In practice, UOKiK investigations usually start with a buyer reporting a discrepancy between the website price and the price quoted at the sales office.
The DOM portal and the changes of 11 November 2026
Alongside the website obligation, Poland runs a public Portal of Data on Housing Transactions (DOM), to which developers report price data. The Act of 17 July 2026 (Dz.U. 2026 item 1077) unifies the technical format — from 11 November 2026, data must be submitted as an electronic document with a uniform structure. For buyers this means easier comparison of offers; for developers, another reason to keep price data consistent across the CRM, the website and the portal.
A broader reform of the Developer Act (draft UD361) is also in the works — it envisages a ban on increasing the price after the contract is signed and stronger protection at the reservation stage. For now, however, it remains a draft, not binding law.
How much does a developer website cost in 2026?
Pricing depends mainly on the number of investments and units, and on how advanced the apartment search and sales-system integration need to be.
| Website model | Approximate cost | Timeline |
|---|---|---|
| Developer business card site (a few pages, contact form) | 2,000–5,000 PLN net | 2–4 weeks |
| Template with faceted search and Art. 19a compliance | 5,000–10,000 PLN net | 3–5 weeks |
| Custom UX/UI — graphical navigator, 3D floor plans, CRM integration | 12,000–25,000 PLN net | 8–12 weeks |
| Corporate site with a multi-investment module and separate views | 15,000–35,000 PLN net | 2–4 months |
- Add running costs: hosting and backups (100–500 PLN per month), a domain (50–150 PLN per year), maintenance and updates (from 300 PLN per month), plus graphic assets if they are not ready — 3D visualisations, floor plans and virtual tours are usually commissioned separately.
What drives the cost of a developer website?
- Number of units in the investment — 30 units is a different scale from 300. Unit cards, floor plans, descriptions and data to maintain multiply with every unit.
- Type of apartment search — a classic filter list is the cheapest; a faceted search and a graphical navigator (picking a unit from a floor plan) add weeks of development work.
- Graphic assets — visualisations, 3D floor plans and virtual tours. For a large project they can cost more than the website itself.
- CRM or sales-system integration — automatic synchronisation of prices, statuses and customer data. The most common source of hidden costs, but also the biggest time saver for the sales office.
- Price update system — manual updates through an admin panel versus automatic CRM sync. With dozens of changes a month, automation pays for itself quickly and removes the risk of fines.
- Multilingual versions — projects sold to foreign buyers need language versions and SEO configuration (hreflang).
- SEO and content — optimisation for the project name and local phrases, location descriptions, area guides.
If the development website is meant to work like an application — with a sales-office panel, online reservations, document generation and payment handling — it is a web application project rather than a website. See how Laravel web development projects are scoped and priced in my offer.
Developer site or investment site? Two different tools
The most common mistake small developers make is one website for the company and all its projects. These are two tools with different jobs.
The developer's corporate website presents the company: history, team, completed projects, certificates and contact details. It builds brand trust and supports sales across all projects. How to build one is covered in our guide to business websites.
The investment website sells specific units: location, visualisations, apartment search, prices, statuses and forms. It has its own branding and messaging tailored to the project's target audience.
The address of an investment website can be handled in three ways
- A separate domain (green-hills.pl) — best for ranking on the project name and for ad campaigns; requires separate configuration and a domain budget.
- A subdomain (project.developer.pl) — a compromise: consistent with the developer's brand and simple to launch.
- A subdirectory (developer.pl/investments/green-hills) — technically the simplest, inheriting the corporate domain's authority.
From the Act's point of view, what matters is availability, currency and completeness of information — all three forms are permitted. From a sales point of view, a separate domain or subdomain usually wins, because it lets you build Google visibility around the project name.
What should a development website include to actually sell?
Meeting the statutory requirements is only the starting line. A website that genuinely sells units needs seven elements proven across hundreds of projects in the industry.
- An apartment search with filters — buyers arrive with a specific question: "are there any available 3-room units under 600k on the 2nd floor?". Without a search they must scroll through 80 listings. With a good one, they get four results in seconds.
- Premium-quality visualisations — the development does not exist yet, so everything buyers know about it comes from graphic materials. A weak visualisation undermines trust in the entire project.
- 3D floor plans for every unit type — a 2D plan says "this is 18 m²"; a 3D plan shows a layout buyers understand instantly. It is one of the features that most strongly drives conversion.
- A location with specifics — a map with pinned points instead of vague claims: "300 m to the kindergarten, a 5-minute walk to the shop, 12 minutes to the centre".
- Live sales status — available, reserved, sold. Statuses create a sense of limited availability and speed up decisions.
- A contact form on every unit card — with the unit number pre-filled in the message, so buyers never have to navigate back to a contact page.
- Mobile first — most traffic and leads on development websites come from phones, often from Facebook and Instagram ads. A search that does not work smoothly on a smartphone does not work at all.
The apartment search is the heart of a development website
This is the feature where you can win the most — or lose the most. The market knows three types of search, differing in implementation cost and sales effectiveness.
- A filter list — a classic table with options for rooms, size, floor and price. The cheapest option, sufficient for small projects, but it does not build engagement.
- A faceted search — filters narrow the results in real time, without page reloads. Every slider movement instantly shows a new set of units.
- A graphical search (navigator) — buyers click a unit on the floor plan and open a unit card with a 3D plan, price and form. A premium solution, strongest for conversions in projects with 50+ units.
A good search works like an application — which is why for large projects we build it in Laravel with a dedicated frontend, designed for performance with hundreds of units and thousands of queries a day. Speed techniques for such listings are covered in our Laravel performance optimization guide.
CRM integration and daily price updates
The Act requires every price change to appear on the website the same day — with the date and full history. Copying prices manually from a spreadsheet into a website panel is a straight path to errors and fines. That is why integrating the website with the developer's CRM or sales system via API is becoming the industry standard.
What does a CRM integration synchronise?
- prices and price history — a change in the CRM automatically reaches the website with its date,
- unit statuses — available, reserved, sold, based on reservation and development agreements,
- unit data — descriptions, areas, floor plans and photos,
- form submissions — leads from unit cards go straight to the sales office.
An example of such a system — a CRM application with a client portal, change history and reporting — is described in our CRM application and client portal case study. Automations can be extended with AI: a chatbot answering questions about the project or automatic lead qualification.
Security and GDPR
Forms on a development website collect buyers' personal data, and sales systems process contracts and payments — data of particular sensitivity. The minimum is an SSL certificate, encrypted connections, a privacy policy and a GDPR-compliant cookie consent mechanism. Application security rules are covered in our Laravel application security — OWASP Top 10 guide.
How to promote a development website
- SEO for the project name — a separate domain or subdomain helps you rank for the project's own name; it is the cheapest traffic, because competition for the name is low.
- Local phrases — "apartments in [city]", "new apartments in [district]", "terraced houses in [area]". Separate pages for locations and unit types.
- Google Ads — campaigns for high-purchase-intent phrases, pointing to specific unit type cards.
- Facebook and Instagram Ads — they generate most traffic on development websites; page speed is critical here, because leads arrive from phones.
- Property portals — Otodom and similar services complement your own website but do not replace it. The Act requires your own site with full prices, and portals rarely show price history.
How long does a developer website take to build?
| Scope | Timeline |
|---|---|
| Developer business card site | 2–4 weeks |
| Template with a faceted search | 3–5 weeks |
| Custom project with a graphical navigator and integrations | 8–12 weeks |
The biggest factor is the availability of materials: visualisations, 3D floor plans, unit descriptions and data for import. Developers who start gathering materials in parallel with the design phase cut delivery time by up to half.
Most common mistakes when ordering a developer website
- Treating the website as a business card only — without a search, prices and unit statuses it neither sells nor complies with Art. 19a.
- Manual price updates without history — the shortest path to discrepancies and a UOKiK fine.
- No CRM integration — double work for the sales office and a constant risk of outdated prices on the site.
- Reusing an old corporate site for a new project — weak rankings for the project name and lower campaign conversion.
- A slow search with poor mobile UX — most leads come from phones; a slow page loses them in the first seconds.
- Low-quality graphic assets — buyers judge the quality of the development by the quality of its visualisations.
- No maintenance plan — a development website lives for years and needs updates, backups and support with price changes.
Choosing the right vendor matters more than in a typical web project — check whether they understand the development industry: Art. 19a requirements, the investment sales cycle and sales-system integrations. Read more on the about page and in the hire a Laravel developer service.
Frequently asked questions
Does a developer have to run their own website?
Yes. Art. 19a of the Polish Developer Act requires developers to run their own website from the day sales start, and if reservation agreements are used, before the first one is signed. The duty has been in force since 11 July 2025 and lasts until ownership of the last unit in the project is transferred.
What must a developer website contain?
Gross prices of all units on offer, price per square metre of usable area, prices of ancillary rooms and rights, information on other financial obligations, price change history with dates, the general part of the information prospectus in a downloadable form, the registered office and sales office addresses, contact details and the location of the development.
How much does a developer website cost in 2026?
From 2,000–5,000 PLN net for a business card site, 5,000–10,000 PLN net for a template with a faceted search and statutory compliance, 12,000–25,000 PLN net for a custom project with a graphical navigator, 3D floor plans and CRM integration, up to 15,000–35,000 PLN net for a corporate site with a multi-investment module. Running costs start at around 300 PLN per month.
What happens if a developer fails to update prices on the website?
Breaching the information duties is a practice infringing collective consumer interests — the President of UOKiK can impose a fine of up to 10% of the preceding year's turnover. In addition, if the price on the website was lower than the one offered when the contract was concluded, the buyer may demand the most favourable price.
How long must a developer keep the website online?
From the day sales start (or before the first reservation agreement) until ownership of the last unit in the project is transferred — in practice several years. Throughout that time, prices and their history must stay current.
Does a development website need a separate domain?
The law does not prescribe an address — a separate domain, a subdomain or even a subdirectory on the corporate site are all permitted. From an SEO perspective, a separate domain or subdomain has an edge for ranking on the project name, while a subdirectory is technically simplest and inherits the corporate domain's authority.
Developer site or investment site — which to choose?
Ideally both. The corporate site builds trust in the developer as a brand, while the investment site sells specific units — with an apartment search, prices and statuses. With several projects, consider a corporate site with a multi-investment module, each project with its own presentation.
How long does it take to build a development website?
A template site with a faceted search: 3–5 weeks. A custom project with a graphical navigator, 3D floor plans and integrations: 8–12 weeks. The timeline depends mainly on how quickly visualisations, floor plans and unit data are delivered.
Sources and legal basis
- Amendment to the Polish Developer Act of 21 May 2025 (Dz.U. 2025 item 758) — introduces Art. 19a
- Polish Developer Act — consolidated act (Dz.U. 2021 item 1177, ISAP)
- Amendment of 17 July 2026 (Dz.U. 2026 item 1077) — uniform data structure from 11 November 2026
- UOKiK — Polish Office of Competition and Consumer Protection — fines for practices infringing collective consumer interests
- Google Search Central — Search Engine Optimization (SEO) Starter Guide
- web.dev — Core Web Vitals
- schema.org — structured data for real estate
👉 Building a development website? See how custom Laravel websites and applications work in my offer — from analysis and UX/UI, through the apartment search and CRM integration, to Art. 19a compliance and post-launch care. Get in touch via the contact form or at kontakt@informatix.com.pl.
👉 Building a corporate developer site too? Check the business websites guide and the CRM application and client portal case study.
📖 See also: Laravel performance optimization and Laravel application security — OWASP Top 10.