Flood risk: what a flood-hazard zone means for a buyer
Von Lumi · Aktualisiert: 16. Juni 2026, 00:00 UTC
A flood-hazard zone affects insurance, repairs and resale. How to read SYKE's flood maps before buying a home.
Dieser Ratgeber beschreibt Regeln und Praxis in Finnland.
This guide is only available in English.
Wichtig: A flood zone can affect insurance, basement spaces and resale — confirm your insurance terms.
Some Finnish homes sit in a flood-hazard zone near the sea or a watercourse. It doesn't prevent living there, but it's worth knowing: it affects risk, insurance and value.
What the zones mean
SYKE maps flood hazard by return period. 1/100a means a flood occurring on average once in a hundred years (significant); 1/250a is rarer. Coastal and watercourse floods are distinguished.
Why it matters
Flood risk can affect insurance terms, the use of basement and ground-floor spaces, and resale. In new developments the risk is addressed in planning.
How to check
Lumi shows the address's flood-hazard status from SYKE's open data. Also ask the housing company whether flood protection has been done.
Häufig gestellte Fragen
- Does a flood zone prevent buying?
- No, but it's a risk worth pricing in and confirming with your insurer.
- What does 1/100a mean?
- A flood occurring on average once in a hundred years — a significant hazard class.
- Where does the flood data come from?
- From the open flood-map data of SYKE and the ELY centres.
Quellen
Siehe auch
Dieser Ratgeber bietet allgemeine Informationen, keine individuelle Beratung. Zahlen und Regeln bei offiziellen Quellen prüfen.