From 11 November 2026 developers must send flat prices to the minister in one fixed structure. For you as a buyer, the price transparency rules do not change: the unit price including VAT, the price per m² and the history of price changes must still be on the developer’s website, and if the prices differ you can still demand a contract at the price most favourable to you. What changes is the form in which the developer sends the same data to the minister, who publishes it on the dane.gov.pl portal. The regulation meant to set that structure is still only a draft as at 7 October 2026.
If you are buying a flat in Warsaw and want to know whether the prices on dane.gov.pl are up to date right now, we checked this on the files for developments in our catalogue (as at 4 October 2026). The results are below.
Legal position: October 2026.
Since when does price transparency apply, and what does the amendment change?
Price transparency for flats has applied since 11 July 2025. It was introduced by the Act of 21 May 2025 (Dz.U. 2025 item 758), which added art. 19a and 19b to the Developer Act (ustawa deweloperska). Developments where sales began earlier had to comply by 11 September 2025. The current consolidated text of the Developer Act is Dz.U. 2026 item 880.
The amendment of 17 July 2026 (Dz.U. 2026 item 1077) is a short act: it changes only art. 19b. The President signed it on 7 August 2026, it was published on 10 August 2026, and it enters into force on 11 November 2026, three months after publication. There are no transitional provisions. 11 November 2026 falls on a Wednesday and is a public holiday (National Independence Day).
What exactly the act changes:
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| Provision | Until 10 November 2026 | From 11 November 2026 |
|---|---|---|
| art. 19b para. 1: sending data to the minister | once a day, no mandatory structure | once a day, “as an electronic document in line with the data structure set by that minister” |
| art. 19b para. 2a (new) | none | the minister will set the data structure by regulation |
| art. 19b para. 2b (new) | none | model electronic documents are to be available on the open data portal |
| art. 19a: duties towards the buyer | price including VAT, price history, the address of the price page in advertising, the right to the most favourable price | unchanged |
| art. 19b paras. 3-4: publication on dane.gov.pl and sanctions | high-value data, a practice infringing collective consumer interests | unchanged |
The act grew out of an MPs’ bill (print no. 2468) that reached the Sejm on 13 April 2026. The original bill had the minister announce the data format in a notice in “Monitor Polski”. In the end the act refers to a regulation.
Why one format? What the explanatory memoranda say
Until 11 November 2026 the Ministry of Digital Affairs’ recommended data format is not mandatory. In the explanatory memorandum to the bill the authors write that a significant share of developers use the recommended structured format, but part of the data is still disclosed in other ways. The model files, the same memorandum says, were consulted with the Office of Competition and Consumer Protection (UOKiK) and the Polish Association of Developers.
The memorandum to the draft regulation states the aim directly: one structure will allow automatic processing of data and make price information comparable. The date of 11 November 2026 was chosen to avoid a gap in time between the act and the regulation coming into force.
For a buyer this means: today the files of different developers are hard to compare, and after the change they should have the same columns in the same order. How this mismatch looks in practice is shown below on our own data.
What the draft regulation contains and what it does not
The draft regulation of the Minister of Digital Affairs “on the structure of data contained in information on the sale of residential units and single-family houses” has number 12415103 at the Government Legislation Centre (RCL). It is dated 23 September 2026 and appeared on the RCL site on 28 September 2026. The ministry sent it for consultation by letter of 26 September 2026 with a 10-day deadline for comments. As at 7 October 2026 stages 1-4 of 12 are completed at RCL, and the regulation is not in the Journal of Laws.
According to the draft (as at 7 October 2026):
- 57 fields in 10 groups (A-J): the developer, its registered office, the sales office, the location of the project, the unit or house, parts of the property, ancillary rooms, necessary rights, other monetary payments and the address of the prospectus page;
- mandatory for a unit (group E): type of property, unit number, price of 1 m² with the date from which it applies, and the unit price as the product of the price per m² and the area, also with a date. The total price with extras (ancillary rooms, necessary rights) is a conditional field;
- one row is one unit, house or other subject of the contract. The first row is the header, columns follow the order in the table, and a field that does not apply to the offer is marked “X”;
- what is missing: floor area, floor, number of rooms, unit status (available, reserved, sold) and development name. The development address is included;
- the file format (CSV, XML, JSON) is not specified in the draft. It is not in the memorandum or the regulatory impact assessment either.
The conclusion for you: even after the change, the file on dane.gov.pl alone will not tell you whether a flat is still available or which floor it is on. Check the position of the unit in the building in the individual part of the information prospectus (prospekt informacyjny), and whether it is still available on the developer’s website or at the sales office. This is a draft: the final text of the regulation may differ.
How fresh is the data today? A check on developments in our catalogue
The dane.gov.pl portal holds about 14.6 thousand datasets with the phrase “Ceny ofertowe mieszkań” in the name (as at 7 October 2026). These are datasets, not developments.
We checked for how many developments in our catalogue we could find a current file and match specific units to it. The catalogue covers 38 developments in several Warsaw districts. This is not a sample of the whole Warsaw market, so these figures do not show how all developers in the city behave. Nor do we rate individual developers.
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| Result of the file search (38 developments) | Developments |
|---|---|
| Current file, units matched to the development | 22 (58%) |
| The developer’s file exists, but this development cannot be identified in it | 9 |
| Outdated file (last data from 24.10.2025, 05.03.2026 and 03.06.2026) | 3 |
| This development is not in the developer’s file | 2 |
| Match by street name only, unconfirmed | 1 |
| No file found | 1 |
Own analysis based on dane.gov.pl data (as at 4 October 2026; search results from 27 September 2026, 38 developments in the catalogue).
An old file does not have to mean a breach: the development may have sold out, or the developer may have moved the data to another dataset. So for such developments, check the price directly on the developer’s website.
Freshness of the 22 files that the catalogue prices come from:
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| Age of the file on the download date (4 October 2026) | Files |
|---|---|
| same day | 10 |
| 1 day | 9 |
| 2 days | 2 |
| 6 days | 1 |
Own analysis based on dane.gov.pl data (as at 4 October 2026; data dates in the files from 28 September to 4 October 2026).
In one file the data date fell in the future (11 October 2026), so we used the date the resource was created on the portal. Among the 24 files downloaded (22 in the database and 2 excluded) there were 17 CSV files, 6 XLSX files or files saved as binary, and 1 series of daily JSON files. All carry the CC0 1.0 licence.
What today’s files lack: 960 units under the magnifying glass
In 22 developments in our catalogue we counted 960 flats and houses on offer (with a price above zero and without the status “sold”, “reserved” or “unavailable”). This is how complete the data is:
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| Information in the file | Units (of 960) | Notes |
|---|---|---|
| Price and usable area | 880 (91.7%) | for the other 80, the price per m² is given on the settlement area |
| Date from which the price applies | 726 (75.6%) | missing in the files of 4 developments |
| Price history | 42 (4.4%) | 6 developments |
| Floor | 197 (20.5%) | 8 developments; entries vary: “0”, “Parter”, “IV”, “3 piętro” |
| Number of rooms | 94 (9.8%) | 6 developments; excluding 15 entries where the room count does not match the area |
| Unit status | 106 | only 2 developments |
Own analysis based on dane.gov.pl data (as at 4 October 2026; 22 developments, 960 units).
Two examples of why a single format matters:
- Prices of extras in different columns. The price of additional products (parking spaces, storage rooms, boxes, gardens) is given in 1,134 of 1,135 items. In 553 items it sits in the product price column, and in 581 in the column for the price of a part of the property or ancillary room. A program that reads only one column will miss about half of these prices.
- Other payments without amounts. In 548 entries on other payments (for example a conversion fee, or the costs of maintaining the unit until ownership is transferred) there is not a single amount, only names. In one development the mandatory purchase of a storage room for 9 of 18 units was recorded only in the notes column, outside the price fields.
The draft regulation tidies up the price columns, but it does not add floor, number of rooms or unit status. One structure will not fix these gaps.
What this means when buying a flat from a developer
Before and after 11 November the checklist is the same:
- Unit price and price per m² on the developer’s website. The address of this page must be in every advertisement and listing by the developer (art. 19a para. 3).
- The date from which the price applies. With every change the developer updates the page on the day of the change, gives its date and keeps earlier data from the start of sales (art. 19a para. 2).
- The calculation in the contract. In developer agreements (umowa deweloperska) and reservation agreements concluded from 13 February 2026, the price is the product of the usable area in m² and the price per 1 m² (art. 5a).
- A price discrepancy. If the price on the website differs from the price at signing, you can demand a contract at the price most favourable to you (art. 19a para. 6). Save the price page with a visible date before visiting the sales office.
- Floor, area, availability. This data may be missing from dane.gov.pl even after the change. Check it on the developer’s website and in the information prospectus.
Where to find the list and file for a specific development, step by step, is described in the guide where to check the price of a specific flat with the developer. If a developer announces a discount, see also how to tell whether a developer promotion is a real price cut. Median prices from the same files, district by district, are in how many square metres PLN 800,000 to 1.2 million buys by district.
Transaction prices are a separate topic. The provision under which Portal DOM is to publish average prices and median transaction prices (art. 56f of the Act of 17 October 2025, Dz.U. 2025 item 1669) enters into force on 2 April 2027 (legal position as at October 2026).
If you are a foreigner and do not read Polish documents
All the main sources on this topic are in Polish: the Developer Act, the files on dane.gov.pl, the developer’s website, the information prospectus and the draft contract. So a few points follow from the above and are worth keeping in mind when buying.
- Files and documents in Polish. The description of the data structure in the draft regulation is in Polish; a field that does not apply to the offer is marked “X” rather than left as an empty cell. Basic words for reading a file: cena 1 m² (price per m²), cena lokalu (unit price).
- Floor and “available” status cannot be learned from the file. This applies to all buyers, but a foreigner who cannot quickly ask the developer in Polish may find it easier to miss this gap. Look for the position of the unit in the building in the individual part of the information prospectus (prospekt informacyjny), and for availability on the developer’s website or at the sales office (biuro sprzedaży).
- Save the price page with its date before your visit. The right to demand a contract at the most favourable price (art. 19a para. 6) rests on what was actually published on the developer’s website, so a screenshot with a visible date is useful whatever language you read it in.
- Keep the Polish term to hand. When speaking to the sales office or a lawyer, use the Polish names: umowa deweloperska, prospekt informacyjny, rachunek powierniczy, cena 1 m². You will be understood without further explanation.
Who enforces price transparency: UOKiK and sanctions
The 2026 amendment does not change the sanctions. A breach of art. 19a and art. 19b is a practice infringing collective consumer interests (legal position as at October 2026):
- a fine for the developer of up to 10% of turnover from the previous year (art. 106 para. 1 pt 4 of the Competition and Consumer Protection Act, consolidated text Dz.U. 2025 item 1714);
- a fine for a manager of up to PLN 2,000,000 if they intentionally allowed the breach (art. 106b para. 1);
- the UOKiK President may also write to the developer without opening proceedings; the deadline to respond may not be shorter than 14 days from receipt of the letter (art. 49a).
Whether the regulation will be published by 11 November 2026 is not known as at 7 October 2026. We will update this text once it is published in the Journal of Laws.
How prices are shown in the Jawno catalogue
Prices in the catalogue come from developers’ files on dane.gov.pl and carry a data date. How we download and date the files is described on the page where the catalogue prices come from and how we date them. Our reading is the state on a given day. At signing, what counts is the price list on the developer’s website, because art. 19a para. 6 refers to it.
FAQ
Since when has price transparency for flats applied in Poland?
Since 11 July 2025. That is when art. 19a and 19b of the Developer Act came into force, added by the Act of 21 May 2025 (Dz.U. 2025 item 758). Developments where sales began earlier had until 11 September 2025 to comply. The date of 11 November 2026 does not introduce price transparency; it changes the form in which the developer reports data to the minister every day.
What changes on 11 November 2026 for a flat buyer?
The developer’s duties towards you stay the same: the price per m² and the unit price including VAT on the developer’s website, the history of price changes and the right to a contract at the price most favourable to you (art. 19a). Art. 19b changes: from 11 November 2026 the developer must send data as an electronic document in a structure set by the minister (Act of 17 July 2026, Dz.U. 2026 item 1077). Legal position as at October 2026.
Is the regulation on the structure of flat price data already in force?
No. As at 7 October 2026 it is a draft by the Minister of Digital Affairs (RCL no. 12415103, draft dated 23 September 2026) at the consultation stage. The draft provides for entry into force on 11 November 2026, but the regulation has not been published in the Journal of Laws. The Act of 17 July 2026 enters into force on 11 November 2026 and has no transitional provisions.
Will dane.gov.pl show floor area, floor and number of rooms after 11 November?
According to the draft regulation of 23 September 2026, no. The draft has 57 fields in 10 groups, but no floor area, floor, number of rooms, unit status or development name. It does include the development address, unit number, price per m² and unit price with dates. Check floor area and floor on the developer’s website and in the information prospectus (as at October 2026).
What does a developer face for not publishing prices, and what is UOKiK’s role?
A breach of art. 19a and 19b is a practice infringing collective consumer interests. The UOKiK President may impose a fine of up to 10% of the previous year’s turnover, and on a manager who intentionally allowed the breach, up to PLN 2,000,000 (arts. 106 and 106b of the Competition and Consumer Protection Act). The President may also write to the developer without opening proceedings. The 2026 amendment does not change these sanctions.
Choosing a flat from a developer? Write to us before your first visit to the sales office: we register you there before you go on your own. We will check the unit price on the developer’s website and on dane.gov.pl, go through the information prospectus and the draft contract with you, point out what to ask the developer or a lawyer, and go to the sales office together. A buyer on the primary market does not pay us a fee. Our remuneration on the primary market comes from agreements with developers. Agent: Vladyslav Moroz (sole proprietorship, OC liability insurance), service in 7 languages.
Jawno · +48 692 649 839 · infojawno@gmail.com
This text is for information only and is not legal advice. Legal position as at October 2026.