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What is Natural Hazard Insurance?

Natural hazard insurance is a supplementary component to building or contents insurance that covers damage from natural events such as flooding, heavy rain, backflow, landslides, or snow pressure. Without this additional insurance, damage from flooding — one of the most common causes of basement damage — is not covered. According to the GDV, around 41% of residential buildings in Germany have no such cover.

By Jonas Derissen, Managing Director of Drainbee GmbH 2 min read Updated

At a glance

of homes lack natural-hazard cover
41%
ZÜRS risk zones
4
typically covered hazards
5
one-time, no subscription
€298

How does it work?

Standard building insurance covers fire, pipe water, storm and hail. Of all the ways water gets into a basement, it only includes pipe water damage, i.e. damage from burst pipes or defective fixtures. Damage from natural events such as flooding, sewer backflow, or heavy rain is excluded.

Natural hazard insurance closes this gap. It typically covers: flooding and high water, sewer backflow, landslides and subsidence, earthquakes, and snow pressure and avalanches.

The premium depends on the ZÜRS zone (zoning system for flooding, backflow, and heavy rain) where the building is located. Zone 1 has the lowest risk, Zone 4 the highest: there, statistically, flooding is expected at least once every ten years. In some high-risk areas, obtaining coverage can be difficult or expensive.

Important: Many insurers require preventive measures as a condition — such as functioning backflow protection or regular maintenance of drainage systems. Neglecting these obligations risks reduced payouts in the event of a claim.

What does this have to do with Drainbee?

Drainbee doesn't take over any obligation under your natural hazard insurance: you still have to install and service backflow protection. What it can contribute: the level history in the app shows when the water rose in the shaft and whether the pump was running. That helps reconstruct how a loss happened.

Beyond that, Drainbee minimizes the risk of damage itself: early alerting for pump failure or rising water levels can make the difference between an avoided incident and a five-figure claim.

See Drainbee – €298

Frequently asked questions

Do I need natural hazard insurance?
If you have a basement — yes. Without natural hazard insurance, you are not covered for flooding, backflow, or heavy rain. When it comes to water, regular building insurance only covers pipe water damage. And heavy rain can hit any house, not just those near rivers.
How much does natural hazard insurance cost?
It depends mainly on the ZÜRS zone, plus building type, sum insured and deductible. Premiums vary considerably between insurers, so an independent comparison is worthwhile. In the highest hazard class, cover can be expensive or only available with a high deductible.
Will insurance pay if backflow protection is missing?
Many insurers can reduce or refuse benefits if reasonable preventive measures such as backflow protection are missing. Taking preventive measures is typically a condition for full coverage.

Sources

  1. GDV: Fragen und Antworten zur Debatte um eine Elementarschaden-Pflichtversicherung (2026) (opens in a new tab)
  2. GDV: Starkregen nach Gewittern: 41 Prozent der Wohngebäude ohne Elementarschutz (2026) (opens in a new tab)
  3. Verbraucherzentrale: Versicherungsschutz gegen Elementarschäden (2026) (opens in a new tab)
  4. GDV / Die Versicherer: Hochwasser-Check fürs Haus (opens in a new tab)

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