The housing market (primary, secondary or rental) is very often analyzed as a whole, big market in a selected country. Our analysis focuses on the fundamental determinants of this market in 16 biggest cities in Poland, which are the capital cities of the 16 voivodeships. We also clustered the cities to show groups of cities which's housing market behaves in a similar fashion. We confirm that the situation on housing market is driven by fundamental factors and the best way for a further econometric analysis is to divide the whole market into two groups of cities with a number of inhabitants below and over 400 thousand people.