You can check the price of a specific developer flat yourself, without knowing Polish law and without relying on advertising. Two sources are enough: the price list on the developer’s website and the file that the developer submits to the state once a day and the ministry publishes on dane.gov.pl. We do not go through the rules from the beginning here; there is a separate guide on price transparency for that. This is the practical part: where to click, how to recognise the columns, what to compare with what, and how to collect evidence before you walk into the sales office (biuro sprzedaży). Legal position as at October 2026.
Are you in Warsaw, looking at an advert that says “from … zł/m²”, and the sales office quotes a different figure, in Polish? Below are the steps. They take a few dozen minutes and give you the numbers on paper.
Where the price file comes from and who it covers
The obligation 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). The provisions have applied since 11 July 2025. For developments where sales began earlier, the transition period ended on 11 September 2025. The consolidated text currently in force is Dz.U. 2026 item 880.
The obligation rests on the developer. Art. 19a para. 4 also covers a developer selling completed units and a business that sells a unit from such a development for the first time. Private sellers on the secondary market are not named in the provision, so you will not find their prices on this portal.
The two places we check:
- the developer’s website (art. 19a): the price per 1 m² of usable area and the price of the whole unit, the prices of ancillary rooms such as a storage room or garage, and other monetary payments to the developer. All amounts include VAT. A history of price changes is added;
- dane.gov.pl (art. 19b): data submitted to the minister once a day, which the Act calls high-value data.
Step by step: how to find the developer’s file on dane.gov.pl
- Prepare the price list. Go to the developer’s website at the address given in the advert (the developer must state it in advertising, art. 19a para. 3), find your flat and note the unit number. You will use it to connect the data from both sources.
- Search for the dataset. In the portal’s search box, type “Ceny ofertowe mieszkań” and the developer’s name or its special-purpose company. As at 27 September 2026 there are more than 14,000 such datasets. They are datasets, not developments, so one development may have several.
- Open the latest file. Check the column showing the location of the development to be sure it is the right building or stage.
- Find the row with the unit number. Numbers are understandable without translation; you do not have to read the whole file.
- Check the dates. In a file that follows the ministry’s template, next to the price per m², the unit price and the prices of a storage room or other payments, there is a date from which that price applies.
Not every dataset has an archive. Some developers keep a file for every day on the portal. Others publish a single file “as at today”, which is replaced by a new one the next day. In that case the price history can only be read from the developer’s website.
What the file does not contain, and why files look different
The ministry’s template does not include floor area, floor or number of rooms. Until 10 November 2026 the template is not mandatory, so the column layout depends on the developer. From 11 November 2026 the data structure will be set by a regulation issued under art. 19b para. 2a (Act of 17 July 2026, Dz.U. 2026 item 1077); for now it is a draft, and the data will have to be submitted as an electronic document of that structure. As at 27 September 2026 the regulation had not been published. The buyer’s rights under art. 19a are not changed by this amendment.
So always verify floor area, floor and number of rooms on the developer’s website, and take the price, unit number and date from the file.
Glossary: columns and terms in Polish
A browser translator will help with a Polish file, but always compare the amounts with the original. The most common terms:
Scroll the table sideways to see all columns.
| Polish | What it means |
|---|---|
| cena za m² / cena za 1 m² | price per square metre |
| cena lokalu / cena mieszkania | price of the whole flat |
| powierzchnia użytkowa | usable area on which the price is calculated |
| komórka lokatorska, piwnica | storage room, cellar room |
| miejsce postojowe, garaż | parking space, garage |
| pomieszczenia przynależne | ancillary rooms attached to the flat |
| data, od której cena obowiązuje | date from which the price applies |
| rynek pierwotny / wtórny | from the developer / from the previous owner |
Price history and the “reduction”: how to read it
The developer keeps the price history on its own website. Art. 19a para. 2 requires the data to be updated on the day the price changes, the date to be stated, and earlier data to be kept from the start of sales: the old price, the new price and the date. When a developer announces a promotion, compare the date of the announcement with the price that applied that day, and check that the price was not raised just before the “reduction”. We describe this in detail in the guide on how to check whether a developer discount is genuine.
Asking price versus transaction price
The price list and the dane.gov.pl file show asking prices. What flats were actually sold for is shown by the Real Estate Price Register (Rejestr Cen Nieruchomości) on geoportal.gov.pl. Since 13 February 2026 its data has been free of charge (Act of 26 September 2025, Dz.U. 2025 item 1542). In the register’s module you can see the price, the document date, the type of property, the area and the market, primary or secondary. Warsaw is in the service, but with a delay: as at 27 September 2026 the latest Warsaw transactions date from May 2026. The unit layer also includes garages and commercial units, so filter by type of property.
Under the Act of 17 October 2025 (Dz.U. 2025 item 1669), from 2 April 2027 the DOM Portal, run by the Insurance Guarantee Fund (Ubezpieczeniowy Fundusz Gwarancyjny), is to publish average or median transaction prices and the number of transactions on the primary and secondary markets.
The sales office quotes a different price: how to prepare
Art. 19a para. 6: if the price on the developer’s website differs from the price offered when the contract is concluded, you may demand a contract at the price most favourable to you. Prepare in advance:
- Before the visit, take a screenshot of the price list with the date visible and download the dane.gov.pl file from the same day. Do it at home, not at the meeting: the difference will be visible on paper, not only in conversation.
- Check the calculation. In developer agreements concluded from 13 February 2026, including the reservation agreement, the price of the unit is the usable area in m² multiplied by the price per 1 m² (art. 5a). The area is calculated under the Polish Standard in force on the day the building permit application or the notification of construction was submitted.
- Report any discrepancy in writing before signing, citing art. 19a para. 6.
- The provision speaks of the price “when the contract is concluded”. Whether it also applies to a reservation agreement is not settled expressly by the Act, so ask for the unit price in writing before you reserve.
A foreigner’s position: Polish-language documents, the notary, the permit
All the sources are in Polish. Price lists, dane.gov.pl files and the Real Estate Price Register have Polish headings, and developers name the columns differently. Numbers can be read without translation; the glossary above deciphers the headings.
Language of the contract. The Developer Act (Dz.U. 2026 item 880) contains no provisions on the language of the prospectus and the contract. As a rule, documents with a consumer are drawn up in Polish, and versions in other languages may be prepared alongside (art. 8 paras 1–1a of the Polish Language Act, Dz.U. 2026 item 81). A contract with a consumer may be concluded in a foreign language if the consumer asks for it, knows that language, is not a Polish citizen and has been told of the right to a document in Polish (art. 8 para. 1b). The Act does not introduce an obligation to translate documents.
At the notary. A developer agreement takes the form of a notarial deed (art. 40 para. 1 of the Developer Act). Notarial acts are performed in Polish, but at a party’s request the notary may also perform them in a foreign language, in person or with a sworn translator (Notary Law, Dz.U. 2026 item 614, art. 2 § 3). If you do not know Polish and no translation into a language you understand is attached to the deed, the notary translates it personally or through a translator (art. 87 § 1 pt 1). Before signing, the deed is read out, and the notary must make sure that you understand its content and meaning (art. 94 § 1). At that point compare three figures with the price list you saved: the area, the price per 1 m² and the final price.
Permit to buy. A foreigner buys a separate, self-contained residential flat without an MSWiA permit, provided it is not in a border zone (art. 8 para. 1 pt 1 and para. 3 of the Act on the acquisition of real estate by foreigners, Dz.U. 2017 item 2278). Warsaw is not in a border zone. An exception: where a share in a separate property is sold together with the flat, for example in an access road or another part of the estate, MSWiA takes the view that a permit is needed for that share. This applies to citizens of countries outside the EEA and Switzerland. Ask the developer in advance whether such a share is part of the offer.
Who enforces price transparency and where to report a problem
Compliance is supervised by the President of UOKiK (the Office of Competition and Consumer Protection). A breach of art. 19a paras 1–4 and of the data-submission duty under art. 19b is treated as a practice infringing collective consumer interests. The penalty is up to 10% of the previous year’s turnover (art. 106 para. 1 pt 4 of the Act on Competition and Consumer Protection, Dz.U. 2025 item 1714). A manager who knowingly allowed the breach faces up to PLN 2,000,000 (art. 106b para. 1). Consumer help: uokik.gov.pl/pomoc-dla-konsumentow.
How we show prices in the Jawno catalogue
Next to every price in the catalogue we give the source and date. Where the data comes from and how we calculate it is described on the page where the catalogue prices come from and their date. A catalogue price does not replace the developer’s price list: before reserving, always compare it with the price list and the dane.gov.pl file from the same day. We write about what else you will have to pay in the guide on the total cost of a developer flat, and the general rules on price transparency are in flat price transparency: the rules and where to check a price. What to check in the developer’s documents is explained in the guide to the information prospectus.
FAQ
Where can I find the price a developer has reported to the state?
On dane.gov.pl: search for “Ceny ofertowe mieszkań” plus the developer’s name or its company. The developer submits the data once a day (art. 19b of the Developer Act) and the minister publishes it on the portal. The second place is the developer’s own website with the price list and price history (art. 19a). Legal position as at October 2026.
How do I find the right file when there are thousands of datasets?
As at 27 September 2026 there are more than 14,000 “Ceny ofertowe mieszkań” datasets, but these are datasets, not developments. Search for the developer’s company name, open the latest file and check the column showing the location of the development. Then find the row with the unit number from the price list.
Will the dane.gov.pl file show the floor area and the floor?
Usually not. The ministry’s template does not include floor area, floor or number of rooms, and until 10 November 2026 it is not mandatory, so developers’ files differ in layout. From 11 November 2026 the data structure will be set by a regulation issued under art. 19b para. 2a (Act, Dz.U. 2026 item 1077); as at 27 September 2026 the regulation had not been published. Check area and floor on the developer’s website.
What if the sales office quotes a higher price than the file shows?
If the price on the developer’s website differs from the price offered when the contract is concluded, you may demand a contract at the price most favourable to you (art. 19a para. 6 of the Developer Act, as at October 2026). Before your visit, save the price page with the date visible, and report any difference in writing before signing.
Can I get the notarial deed of the developer agreement in another language?
Notarial acts are performed in Polish, but at a party’s request the notary may also perform them in a foreign language, in person or with a sworn translator (Notary Law, art. 2 § 3 and art. 87 § 1 pt 1, as at October 2026).
This text is for information only and is not legal advice. Legal position as at October 2026.
Going to a developer’s sales office? Write to us before the visit
The developer has to be told in advance that you are coming with us, so write to us before your first visit on your own. We will compare the price list and price history of your chosen flat with the developer’s website and the dane.gov.pl file, go through the information prospectus and the draft contract with you, point out what to ask the developer or a lawyer, and, if you wish, come to the meeting with you. We serve clients in 7 languages. You do not pay us any fee for help with buying a flat from a developer. Our fee on the primary market arises from our agreements with developers. Agent: Vladyslav Moroz (sole trader, professional indemnity insurance).
Jawno · Phone: +48 692 649 839 · E-mail: infojawno@gmail.com