Do I need a permit for a deck in Belleville or Madison County?
Check the authority for the project address before building a deck. Belleville directs property-improvement permit questions to its building department; Madison County says deck permits are necessary in its unincorporated areas. Confirm the application, setbacks, inspections and current fees with the correct office rather than assuming one rule covers Metro East.
Start with the property jurisdiction
A mailing city or county name alone does not establish the building authority. Ask whether the property is within city limits or an unincorporated area. An incorporated city may have its own applications, zoning rules and inspection process.
Belleville: ask the building department
Belleville's official Health, Housing & Building page directs property-improvement permits to that department. It provides building, electrical and other applications and explains that fees depend on project size and scope. Confirm which applications your deck requires before construction.
Unincorporated Madison County: deck permit guidance
The county's deck fact sheet says deck permits are necessary in unincorporated areas. It also identifies setbacks as dependent on zoning and whether the deck is attached or freestanding. Ask Planning and Development to confirm the current requirements and fees for your address.
Prepare a useful permit conversation
- Provide the address and a site plan showing the proposed deck and property boundaries.
- Describe size, height, attachment, stairs and railings.
- Ask which drawings, trade permits, inspections and current fees apply.
- Confirm who submits the application and arranges inspections in the written contractor scope.
- Resolve utility-location and site-access requirements before excavation.
Questions to settle before work starts
Does a deck under 30 inches automatically avoid permits?
Do not use a single height threshold as permission to build. Ask the authority for the project address to review the proposed work and any zoning or setback requirements.
Does the Madison County fact sheet apply inside every city?
The cited permit statement applies to unincorporated Madison County. For an incorporated city, confirm requirements with that city's building department.
What is the permit fee?
Ask the current permitting office. Published guidance may be older, and fees depend on the authority and scope. Include permit responsibility and applicable costs in the written estimate.
Who pulls the permit?
Confirm the applicant and inspection responsibilities with the permitting authority and put the agreement in the written scope before construction.
Sources checked October 5, 2026. This page helps prepare a permit inquiry; the permitting authority determines requirements for the actual property.
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