How to Value an Apartment in Poland: RCN, NBP Reports, Appraiser's Report, and Calculators (2026)
Offer prices from portals are ceilings, not values – true amounts from notarial deeds can be found in the real estate price register (RCN, FREE data since 2020) and quarterly NBP reports (offer vs transaction prices, in several cities). The official document is solely the appraiser's report (a still regulated profession, online registry; valid for 12 months, ~500–1500 PLN) – valuing without qualifications can incur a fine of up to 50,000 PLN. Plus: what shifts the price, the 3 most expensive mistakes sellers make, and a valuation scenario from abroad; starting April 2, 2027, the government Portal DOM will be launched.