City of Wilmington

Will County, Illinois

Last verified September 17, 2026

City of Wilmington is a jurisdiction in Will County, Illinois, 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: 779-801-2136
Email: inspector@wilmington-il.gov
Department Site: Building Department (opens in a new tab)

Source: wilmington-il.gov (opens in a new tab)

Permit Search

Oxcart Online Permitting (opens in a new tab)

Certificate Holder Mailing Address

City of Wilmington, Building Department
1165 S. Water Street
Wilmington, IL 60481

Use this address when the jurisdiction needs to be listed as a certificate holder on a contractor's insurance documentation.

Additional Notes

This is the larger City of Wilmington in Will County (not the Village of Wilmington in Greene County). Confirmed via the City's official site (wilmington-il.gov). Contact listed is Susie McDavid, Building Permit Tech. The City has contracted with B&F Construction Code Services, Inc. for plan review and inspections; inspection scheduling is also available via constructioncodes.com/inspections per the official page. The Oxcart portal is a third-party vendor platform referenced directly on the City's own building-department page, used here as the online-portal entry point rather than as a fact source.

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 — City of Wilmington'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.

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