Zoning, building permits and septic rules in Village of Wilmington, Illinois

Village of Wilmington’s own rules

• Building permitRequired

  Construction work inside Wilmington village, administered by the city Building Department.

  • The page lists activities that do not require a permit: landscaping, exterior painting and interior painting and paneling, repair or replacement of fixed appliances.
  • The page says to call city hall if unsure whether a permit is required.

  “obtain a building permit (if you are unsure if a permit is required, please call the city hall and ask for the building department).”

• Building code adoptedAdopted (with conditions)

  New construction and alterations inside Wilmington village.

  • Page lists 2021 International Building Code, 2021 International Residential Code, 2021 International Fire Code, 2020 National Electrical Code, 2021 International Mechanical Code, 2021 International Property Maintenance Code, Illinois Energy Conservation Code, Illinois Plumbing Code and Illinois Accessibility Code.
  • The page says the city has amended certain sections of these codes by ordinance; the amendments were not read.

  “the city has adopted and enforces the following national and state codes.”

• InspectionsRequired

  Permitted construction work inside Wilmington village, inspected by the city's contracted inspector (B&F Construction Code Services, Inc.).

  • The page says inspections are scheduled through constructioncodes.com/inspections.
  • Scope of inspections and their stages were not read in the code.

  “schedule inspections as necessary: don't proceed with additional work until completed work has been inspected.”

• Local zoningPresent (with conditions)

  Land inside Wilmington village (City of Wilmington, Will County, IL, ZIP 60481) under the city's own zoning ordinance, which the city's zoning page links on Municode.

  • The city's zoning page says zoning ordinance text is on Municode; the Municode page opened as a script shell with no code text, so the ordinance text itself was not read.
  • The city's own website calls the place the City of Wilmington; the jurisdiction record calls it a village. Treated as the same place.

  “the wilmington planning and zoning commission is a group of individuals appointed by the mayor with council approval that work with the city planner, attorney and engineer.”

• Zoning districtsPublished (with conditions)

  Zoning districts of Wilmington village (City of Wilmington, IL).

  • The zoning page lists the district names and minimum lot sizes; the official zoning map is linked there as a 2026 zoning map but was not opened.

  “zoning types: a-1 agricultural district e-r estate residential district (20,000 square foot minimum lot size)”

• Minimum lot sizeSpecified

  Estate residential E-R district (rural-residential/large-lot district) inside Wilmington village.

  • Figure is the minimum lot size stated on the city's zoning page; the ordinance section was not opened.

  minimum lot size: >= 20000 square feet

  “e-r estate residential district (20,000 square foot minimum lot size)”

  One more reviewed finding on this topic

  • Specified — Main single-family residential district R-1 inside Wilmington village.

    “r-1 residential district (10,000 square foot minimum lot size)”

• Permit processPartial

  Building permits and inspections inside Wilmington village.

  • Page lists a building permit application form and contractor registration, and an online inspection scheduling link; the application form and fee schedule were not opened.

  “to schedule an inspection, click the link provided below: constructioncodes.com/inspections”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Village of Wilmington or Greene County directly.

• Owner-builder exemption — Owner-builder exemption from contractor requirements inside Wilmington village.
• Certificate of occupancy — Certificate of occupancy for new homes inside Wilmington village.
• Minimum dwelling size — Minimum dwelling floor area in the R-1 residential district inside Wilmington village.
• Setbacks — Yard setbacks in the R-1 residential district inside Wilmington village.
• Lot coverage — Maximum lot coverage in the R-1 residential district inside Wilmington village.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.