Obtain a permit for a rainwater harvesting system in Unterallgäu is handled by Untere Wasserbehörde Unterallgäu (zuständig für Unterallgäu); in the region it currently takes about approx. 2 weeks.
Quick answer
Documents you need
Identification card or passport · Form / Application
Costs
Kostenlos bis 150 € je nach Leistung
approx. 2 weeks in Unterallgäu
In Unterallgäu we expect around approx. 2 weeks processing time – based on reports from the region, not on official figures.
Official: max. approx. 4 weeks
Report the facility to the Lower Water Authority
In most states, a notification is sufficient; no permit is required.
Check technical requirements
Separation of drinking water, backflow prevention, and pipe labeling.
Operation of the system
Upon receipt of the report and, if necessary, confirmation from the authorities.
Who is eligible?
Homeowners who want to use rainwater for flushing toilets, watering their gardens, or running their washing machines.
Income limit
Success rate
approx. 90.0 % (estimate)
File a written objection within 30 days – with reasons why the decision is wrong and any missing evidence.
Free up to €150, depending on the service.
Typically about 14 business days—depending on the agency and its workload.