WFS interface

From the dataset abstract

City plans that were approved and came into force in 2020, 2021 and 2022 are a geographic dataset containing areal geometries. The data contains the delimitations of those city plans that indicate residential floor area. HSY (Helsinki Region Environmental Services) has collected the data from the municipalities of the Helsinki region (Espoo, Helsinki, Kauniainen, Vantaa, Hyvinkää, Järvenpää, Kerava, Kirkkonummi, Mäntsälä, Nurmijärvi, Pornainen, Sipoo, Tuusula and Vihti) in the springs of 2021, 2022 and 2023 as part of the follow-up of the Helsinki region MAL agreement.

More detailed data descriptions (in Finnish)

Interface address: https://kartta.hsy.fi/geoserver/wfs

Source: Asumisen kerrosala uusissa asemakaavoissa Helsingin seudulla 2020-2022