Berlin rainwater fee calculator

Use the estimator to compare detected roof catchment with the charged area from a BWB Niederschlagswassergebühr notice. The result is preliminary and must be checked against the official notice.

Enter an address, review the estimate, compare the notice area.

Potential savings checks

Green roof or wet roofQuick scenario assumes qualifying roof sections can be reduced to 50% chargeable until BWB proof is confirmed.Roof drains into garden or infiltrationQuick scenario treats connected roof area as not chargeable only after on-site infiltration is documented.Cistern or rainwater-use systemQuick scenario uses a 50% chargeable share until tank capacity and accepted rainwater use are verified.Some buildings are not connected to sewerQuick scenario removes these sections only if roof water does not discharge to the public sewer.Official bill area is higher than detected areaQuick scenario prices only the difference entered in the official-area field below.

BWB notice comparison

Notice files are read locally in your browser for area detection. Details are only sent if you submit a checklist or review request.

Charged area from the BWB noticeUpload BWB rainwater fee notice

Enter a Berlin address to estimate roof catchment.

The result separates detected roof footprint from chargeable roof area, so reductions and non-sewer drainage can be modeled before comparing the bill.

How the check works

1Enter an address and detect roof areas.
2Adjust drainage and reductions.
3Compare the official notice area.

Fee rate

1.84 €/m²

Amtlicher BWB-Satz, derzeit mit 1,84 €/m²/Jahr geführt

Source checked

2026-06-15

Berliner Wasserbetriebe

Data mode

live official lookup

EPSG:25833

More for Berlin

City page Stormwater fee guide Notice guide