Average expressed as a quotient of the value and useful floor area of dwellings sold during the given period.

Calculations take into account data on market transactions, i.e. sales on the free market (with some exclusions, e.g. sales between related parties) and sales under tender procedure. In case of lack of appropriate information in datasets from RCiWN, the breakdown into the primary and secondary market is based on the assumption that sales on the primary market concern transactions made on the free market by legal persons and the average price per 1 m² of usable floor area is at least PLN 2,000. Transactions on the secondary market include the rest of market transactions concluded on the free market as well as sales under tender procedure.