Konstancin-Jeziorna Property Prices, Rents & Rental Yields

About Konstancin-Jeziorna

Konstancin-Jeziorna lies south of Warsaw and is known for its spa heritage and leafy villa streets. Within Mazowieckie voivodeship, these features give its house market a setting distinct from the capital, even though Warsaw remains a useful geographic reference.

In October 2026, the clearest signal for houses is the gap between sale prices and rents. The average sale price stands at 3,500,000 zł, up 6.1% month over month, while average rent is down 10.1% over the same period. For a rental investment, those movements pull in opposite directions: the average cost of buying has risen while the average income from letting has eased.

The reported yield of 4.86% offers a reference point, but the monthly changes show why it should not be considered in isolation. A higher average sale price does not automatically strengthen the rental case when average rent moves the other way. Nor does a single month establish that the gap will persist. The practical question is how a house’s purchase price compares with the rent it could plausibly earn, rather than whether its asking price follows the broader market average.

These figures describe averages for houses across Konstancin-Jeziorna, not the economics of any particular property. October’s contrast makes that distinction worth keeping in view: a citywide yield can guide an initial comparison, but an investment assessment still depends on the price and achievable rent of the house being considered.