Zoning, building permits and septic rules in Wilmington Township, Illinois

Rules another office applies inside Wilmington Township

Wilmington Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

• Building permitRequired

  Buildings and building systems (including water supply and sewage disposal) on unincorporated land inside Wilmington township; land inside the City of Wilmington is excluded

  • Exception: in manufacturing facilities, process components do not need a building permit (150.002(a)(1)); occupied buildings in a manufacturing facility still do.
  • 150.002(c): no building permit may be issued for a lot that does not conform to 765 ILCS and the Will County Health Department or other agencies' sewage disposal and water supply requirements.

  “a permit must be obtained in advance and all other requirements of the building ordinance must be complied with”

• Building code adoptedAdopted

  New construction and alterations of buildings on unincorporated land inside Wilmington township (Will County Building Ordinance)

  • Edition year of the adopted codes it incorporates by reference was not confirmed on the opened official text.
  • Applies only outside the limits of cities, villages and incorporated towns of the county.

  “the regulations and standards contained in the previously published books or pamphlets referred to in this ordinance are hereby adopted by reference and made a part of this building ordinance.”

• Who permits septicCounty (with conditions)

  Private sewage (septic) systems on unincorporated land inside Wilmington township, administered by the Will County Health Department

  • The county page lists service locations in Joliet, Bolingbrook and Monee; it does not name Wilmington township specifically.
  • Building ordinance 150.002(c) also refers to Will County Health Department requirements for sewage disposal.

  “the will county health department environmental health division provides inspections of water wells, waste water treatment systems and non-community public water supplies.”

• Well permitRequired

  Water supply installations such as private wells on unincorporated land inside Wilmington township

  • Permit is required in advance under the building ordinance; the health department's well-construction rules were not opened.

  “a permit must be obtained in advance and all other requirements of the building ordinance must be complied with”

Still unanswered

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

• Owner-builder exemption — Owner-builder exemption from building permits on unincorporated land inside Wilmington township
• Inspections — Building inspections for construction on unincorporated land inside Wilmington township
• Certificate of occupancy — Certificate of occupancy for new homes on unincorporated land inside Wilmington township
• Local zoning — Land inside Wilmington township's unincorporated limits: whether the township itself adopted and administers a zoning ordinance
• Zoning districts — Zoning districts on unincorporated land inside Wilmington township

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.