City Building Permits
Wilmington, IL - 2026 Building Permit Guide
How to apply for a building permit in Wilmington, Illinois. Permit authority, application steps, fees, and inspection requirements.
Permit Authority
Serves the City of Wilmington.
- Department
- Building Department
- Address
- 1165 S. Water St., Wilmington, IL 60481
- Phone
- (779) 801-2136
- Website
- https://www.wilmington-il.gov
Online Permit Portal
Platform: B&F Construction Code Services • Account required: No • Submission: Online only
Application Process
- Download application from city website.
- Submit in person to City Hall.
- Include Plat of Survey, contract, and plans.
- Third-party review (B&F) takes place.
- Notification of approval and fees.
- Pay fees and pick up permit.
Typical processing time: Varies; typically 10-15 business days.
Source: Building Department
General Requirements
Decks, pools, fences, structural, roofing, siding.
Required Documents
- Plat of Survey
- Contract
- PDF + Paper plans
- Permit validity
- 1 year.
- Building code
- IBC 2021, IRC 2021, IEBC 2021, NEC 2020.
- Owner-builder
- Allowed for primary residence.
- Contractor requirements
- Must be registered ($100).
Fees
- Plan check fee
- Charged per B&F rates.
- Permit fee formula
- Valuation-based.
- Trade permit fee
- Included in permit fees
- Payment note
- Online payment portal for fees.
Work That Does NOT Require a Permit
- Interior cosmetics.
- Minor repairs.
Important: Exempt from building permit does not mean exempt from zoning and planning requirements. Confirm edge cases with the Building Department before proceeding.
Inspections
How to Schedule
- constructioncodes.com (online)
- (779) 801-2136 (phone)
- Scheduling deadline
- 24-hour notice.
- Inspection hours
- Monday - Friday
- Time windows
- Standard business hours
Typical inspection sequence: Typical sequence: Roughs, Finals.
Remote video inspections may be used for certain inspection types at the city's discretion.
Additional Resources
- Building code: IBC 2021, IRC 2021, IEBC 2021, NEC 2020.
- Verify contractor license: Illinois Department of Revenue (Contractor Registration)
- Zoning information: View zoning info
- Forms
- License lookup guide: Illinois Contractor License Requirements
- Contract template: Illinois Homeowner-Contractor Agreement
- Illinois hub: Illinois Contractor License & Permit Hub
Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Building Department before applying.
Frequently Asked Questions
Wilmington Building Permit FAQ
- Do I need a building permit in Wilmington, IL?
- Decks, pools, fences, structural, roofing, siding.
- How much does a building permit cost in Wilmington, IL?
- Fees are calculated as: Valuation-based.. Plan check fee: Charged per B&F rates..
- How do I apply for a building permit in Wilmington, IL?
- 1. Download application from city website. 2. Submit in person to City Hall. 3. Include Plat of Survey, contract, and plans. 4. Third-party review (B&F) takes place. 5. Notification of approval and fees. 6. Pay fees and pick up permit.
- How long does it take to get a building permit in Wilmington, IL?
- Typical processing time is Varies; typically 10-15 business days..
- What work is exempt from building permits in Wilmington, IL?
- The following work is generally exempt: Interior cosmetics.; Minor repairs.. Note: Exempt from building permit does not mean exempt from zoning and planning requirements. Confirm edge cases with the Building Department before proceeding.
- How do I schedule a building inspection in Wilmington, IL?
- Inspections can be scheduled via: constructioncodes.com, (779) 801-2136. 24-hour notice..
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