Postcode 00130 Kaartinkaupunki has 7 listings asking 5 to 20% less than the price model's estimate. Their gap to the estimate averages 9.2% and their mean asking price is €8,504/m². The model's average error on new listings is ±10.5%, so a smaller gap is ordinary model error. Gaps over 20% are left out because they usually come from incomplete listings. The count covers flats of 15 to 120 m² with 1 to 4 rooms built in 2010 or earlier, as in the Finder's default search. Data updated 28 Oct 2026.