A price model trained on Helsinki listings estimates what each flat would typically ask. The map shows where asking prices fall below that estimate.
each tick is one postcode
The Helsinki postcodes with the most apartment sales in the latest quarter Statistics Finland has published.
Listings asking less than the model's estimate, by Helsinki postcode.
Two tools for the Helsinki housing market.
Listings asking 5 to 20% less than the model's estimate, each shown with the model's margin of error.
Open the Finder →Realised sale prices matched to the listings' asking prices up to the end of 2025. Its source, the Asuntojen hintatiedot service, received no sales in 2026, so the archive no longer grows.
View sales →Type a postcode, pick areas on the map or search all of Helsinki.
Each row shows the asking price, the model's estimate and the gap. A gap means something only when it is larger than the model's margin of error.
The listing page shows the inputs the model used, recent sales nearby and a cost breakdown. Read the housing company's documents before you bid.
The estimates come from an XGBoost tree model with 27 inputs, trained on the asking prices of Helsinki listings over 365 days up to 10 Sep 2026. The table shows how much of the model's weight each group of inputs carries.