What does a flooded basement cost?
Estimate what a flooded basement costs – and how little Drainbee costs by comparison.
- of German homes lack natural-hazard cover (GDV)
- 41%
- is what Drainbee costs relative to this damage
- 3.9%
For comparison
- Your estimate€7,600
- Avg. heavy-rain claim 2002–2021 (GDV)€7,600
- Avg. natural-hazard claim 2025 (GDV)€4,700
- Drainbee, one-off€298
How exposed is your basement? Take the risk check
A model, not an assessment of your property. The starting value (60 m², detached house, standard finish) equals the average heavy-rain claim on residential buildings reported by the German Insurance Association (GDV): €7,600 (2002–2021). Area, finish level and property type scale this value; the factors are our assumptions. Actual costs can be well below or above it.
Questions about the calculator.
How accurate is the calculation?
It's a model. The starting point is the average heavy-rain claim on residential buildings according to the GDV, €7,600 (2002–2021). For 60 m², a detached house and a standard finish, the calculator shows exactly this value. More floor area, a higher-end finish or a larger building raise it; an unfinished basement lowers it. These factors are our assumptions, not statistics.
What does the estimated damage include?
The GDV figure covers insured damage to the building. Damage to contents and any insurance excess often come on top in practice.
Will my insurance pay?
In Germany, heavy rain, flooding and sewer backflow are only covered by natural-hazard insurance (Elementarschadenversicherung), which around 41% of residential buildings don't have (GDV). Groundwater coming through walls or the floor slab is usually not covered even with that insurance (GDV). Damage you catch in time never needs a claim.
Are there ongoing costs with Drainbee?
No. Drainbee costs a one-off €298 including the sensor, cloud connection and app. No monthly fees.