Town of Trenton
Washington County, Wisconsin
Last verified September 18, 2026
Town of Trenton is a jurisdiction in Washington County, Wisconsin, with an online portal for searching and pulling active or historical building permits. Use the contact information below to reach the local building department, or the mailing address if the jurisdiction needs to be listed as a certificate holder on a contractor's insurance documentation.
Contact
- Phone
- 262-675-6009 x105
- building@townoftrenton.wi.gov
- Department Site
- Walter Grotelueschen, Building Inspector (opens in a new tab)
Certificate Holder Mailing Address
Walter Grotelueschen, Building Inspector1071 Highway 33
West Bend, WI 53095
262-675-6009 x105
Use this address when the jurisdiction needs to be listed as a certificate holder on a contractor's insurance documentation.
Additional Notes
Confirmed on the Town's own Building Permit Information page. Inspector's home office line: (262) 675-0909; digital permit submissions can be emailed to Permits@townoftrenton.wi.gov; office hours limited (Wednesdays 3:00-5:00 p.m.). Town Hall: 1071 Highway 33, West Bend, WI 53095. This Town of Trenton (Washington County) is UNRELATED to the two other Towns of Trenton in this list (Dodge County and Pierce County) — researched independently, per project convention.
What You Need Before Applying for a Permit
Most building departments ask for the same core package before they'll issue a permit: a completed application naming the property owner and contractor, the contractor's state license number and proof of insurance (general liability, and workers' comp if employees are on the job), a notice of commencement or equivalent recorded filing for larger jobs where the state requires one, and scaled plans or a site plan for anything beyond minor repairs. Roofing, fence, pool, and solar permits typically have their own simplified checklists — Town of Trenton's department (above) can confirm exactly what applies to your project.
Why this matters for insurance: permit history is one of the first things an underwriter or adjuster checks. Unpermitted work — a finished basement, an added bedroom, a rebuilt roof — can complicate a claim or even void coverage for that portion of the loss, and it routinely surfaces during a home inspection. Pulling the right permit up front, and keeping the closed-permit record on file, protects both the property's value and its insurability at resale.
More in Washington County
See Washington County property and court records →
Other building permit jurisdictions in Washington County: