Where the prices come from and how we calculate them

Property prices: from notarial deeds

Prices of houses, plots of land, garages and commercial premises come from the same register and are calculated using the same method (the median of open-market transactions). The transactions included in each property type are described below the figures on its page.

Source

Property Price Register (RCN, Polish official register of real-estate transactions). County authorities record every transaction in it on the basis of a notarial deed, and the Head Office of Geodesy and Cartography provides the data free of charge through a web service. These are the prices at which flats were actually sold, not asking prices from property listings. We do not store or publish data about the parties to transactions, deed numbers or notary's offices.

Data status: latest deed dated 30 September 2026, recalculated on 5 October 2026. Data is provided by 372 of 380 counties; the remaining county offices do not yet publish transactions in the national register. After cleaning, our calculations use 995,958 transactions since 2022.

Which transactions we include

• Residential premises sold on the open market (excluding auctions, discounts and enforcement proceedings), in their entirety (1/1 share).
• Area from 15 to 250 m², price from PLN 1,000 to PLN 60,000 per m² (obvious input errors are excluded).
• The price of the flat alone, excluding a garage or parking space sold under the same deed: we use the price of the premises from the deed or, if unavailable, the price of the unit property, and the total transaction price only when the deed covered a single unit. We exclude deeds covering a flat together with a garage where the register does not state the price of the flat alone.

How we calculate

• Median price per m²: half of the flats sold for more and half for less. It is not affected by individual luxury apartments.
• Period: the last 12 full months. County offices submit notarial deeds with delays ranging from several weeks to several months, and primary market (new builds) transactions are recorded more slowly, so we exclude the last two months for each county (powiat).
• Year-on-year change: the median for the last three full months compared with the same three months a year earlier, provided that there were at least 30 transactions in each period. The “where prices are rising, where they are falling” rankings are calculated using the secondary market (resale), because the primary market (new builds) depends on which development a developer happened to complete at the time.
• Locality means a municipality (gmina): an urban, urban-rural or rural municipality. Cities with county (powiat) status are counted in their entirety, including all districts.
• We publish a locality page when there have been at least 20 transactions within 24 months.
• On the locality page, you select a period: the last 12, 24 or 36 months (the buttons show the specific months, e.g. 04.2025‑03.2026), any calendar year, or the entire period since 01.2022. For each figure, we state the months from which the transactions come. We show a street when there are at least 8 transactions in the period (5 for periods of up to 12 months and calendar years).
• Prices before 2022 (the 'since …' section on the locality page): annual medians from the register's full archive, dating back to 2004. We only show years for which the county (powiat) submitted a complete dataset to the national register (at least 25% of the highest annual number of transactions recorded in 2022‑2025) and the locality had at least 10 transactions. Some county offices submitted historical data selectively, so entire years are missing for some cities (e.g. Warsaw 2017‑2020). Older notarial deeds often do not specify the transaction type or share, so the absence of this information does not exclude a transaction. Prices are nominal.
• Poland and voivodeships: only counties with data for until March 2026, so that the sample does not change from month to month.

Limitations

The median does not account for the standard of the flat or its exact location. A change in the median may result from more new or smaller flats being sold during a given period. That is why, alongside the median, we show the number of transactions, the split between the primary market (new builds) and secondary market (resale), and the number of rooms.

Register data is provided by the Head Office of Geodesy and Cartography (Property Price Register WFS service). Compiled by: indekscen.pl. When citing, please include the source and a link.