Do I Need a Permit to Install a Sprinkler System in Wisconsin?
Irrigation system installations may require a plumbing permit for the backflow prevention device and connections to the water supply.
Yes, you typically need a permit. Requirements vary by municipality. Check with your local building department for specifics.
Where to Apply
Permit requirements, fees, and processing times vary by municipality. Check the specific requirements for your location:
Browse all jurisdictions →Frequently Asked Questions
Do I need a permit for a lawn irrigation system?
Some municipalities require a plumbing permit for the backflow preventer connection. Others require a separate irrigation permit. Check with your local building and water departments.
Is a backflow preventer required?
Yes. Wisconsin plumbing code requires a backflow prevention device (typically a reduced pressure zone assembly) on all irrigation system connections to the potable water supply.
Can I install my own sprinkler system?
Homeowners can install their own irrigation system, but the backflow preventer must be installed by a licensed plumber in many municipalities, and inspections may be required.
Building in multiple cities?
See permit requirements for any Wisconsin municipality instantly. Compare fees, timelines, and processes side by side across your active jurisdictions.