Town of Trenton, Washington County, Wisconsin
There are THREE Towns of Trenton in the State of Wisconsin. We are in WASHINGTON County.
Please do not submit permit applications for the other Trenton Townships.
Link to Town of Trenton in DODGE County - located in the Fox Lake/Beaver Dam area
Link to Town of Trenton in PIERCE County - located in Hager City, near the Mississippi River
Building Inspector
Walter Grotelueschen
Town Hall Phone: (262) 675-0415
Home Office Phone: (262) 675-0909
Email: building@townoftrenton.wi.gov
Office Hours - Wednesdays - 3:00 - 5:00 p.m.
Permit applications and digital plans can be submitted via email to Permits@townoftrenton.wi.gov
Payment types accepted:
- Cash
- Check (pay to Town of Trenton)
- Credit Card or e-check (fees apply)
Both paper and digital building plans must accompany applications for the following projects:
- New Home - also see
- Addition
- Remodel
- Deck
- Fence
- Accessory Structure (shed, detached garage, etc)
When building outside the existing footprint of any structure, such as an addition, deck or accessory structure, complete the following:
- Washington County Permit Signoff Self Certification Form
- Washington County Permit Application Review - Instructions
Fire Separation and dwelling unit separation (Wis. Stats. SPS 321.08)
Building Permit Applications for Town of Trenton in WASHINGTON COUNTY
Building Permit Application 2026 - NEW RATES!
Agricultural/Commercial Building Permit Application
Driveway Culvert Permit Application- Required for new homes or when changing the driveway surface
Residential Electrical Permit Application 2026 - NEW RATES!
- Solar Energy Systems Checklist - Required for roof or ground solar installation
HVAC Permit Application 2026 - NEW RATES!