The paper presents the shaping of average flat prices on the secondary market in selected cities in Poland in the years 2006–2020. In this period, the subsequent phases of price shaping were: price increase, correction, stabilisation and another increase. The aim of the research discussed in this paper is to assess the differences between housing prices made real on the basis of the following indices: inflation, salary growth, and increasing creditworthiness. The study also focuses on the assessment of the consequences of the above-mentioned differences for the shaping of the housing market. The analysis was performed on the basis of public data from Statistics Poland and the National Bank of Poland. The research demonstrates that despite nominal increases in flat prices, they are available relatively easily. This is thanks to increasing average salaries and buyers’ creditworthiness, and the fact the market is able to accept housing prices adjusted by the creditworthiness indicator at a record-high level.