Building permits, zoning and land rules in Macoupin County, Illinois

Yes, in a limited situation. Unincorporated Macoupin County requires a county building-program permit for new construction that requires a septic system¹. The permit costs $100¹ and goes through the Macoupin County GIS Manager/Plat Officer¹. Illinois does not issue building permits for privately funded construction; any permit requirement is handled by the applicable local government⁵. Illinois nevertheless has statewide baseline building-code requirements effective in 2025, including rules for jurisdictions without a locally adopted code⁶. Macoupin County's adoption of a local building code, its inspection requirements and any certificate-of-occupancy requirement remain unconfirmed, so ask the GIS Manager/Plat Officer what documentation and inspections apply to the particular project¹.

The Macoupin County GIS Manager/Plat Officer issues the county building-program permit for qualifying work in unincorporated Macoupin County¹. Call 217-854-3181, extension 5050, before designing the project or scheduling site work¹. Explain whether the parcel is inside a municipality, whether the project is new construction and whether it will use a private septic system; those facts determine whether the limited county permit described on the official hub applies¹. The county has not confirmed a general building-inspection process, a certificate-of-occupancy process, or an owner-builder exemption for unincorporated construction, so ask the office those questions directly^1,2. Illinois does not conduct permit review or building inspection for ordinary privately funded construction; those matters belong to the applicable local government⁵.

Unincorporated Macoupin County has no county zoning, so no county zoning district sets minimum lot size, minimum home size, setbacks, lot coverage or building height outside city and village limits¹. A city or village sets its own zoning inside its limits, so contact that municipality before relying on the unincorporated answer¹. No county zoning does not erase the county building-program permit for new construction needing septic, the countywide septic permit, the well permit or subdivision review^1,7. The Plat Officer reviews plats before recording for compliance with the State Plat Act and County Subdivision Code⁷. The county information does not confirm rules on agricultural buildings or short-term rentals, so ask the GIS Manager/Plat Officer¹.

A private septic system permit costs $300 and is required throughout Macoupin County, city or village included, unless public sewer is available¹. Installers need a septic contractor license, which costs $75, and the county page says homeowners must also obtain a license for septic installations and repairs¹. Illinois requires plan approval before construction of a new system and at least 48 hours' notice to the department or local authority before work begins⁸. Only about 8.9% of county soils avoid severe limitations for a conventional drain field, so settle system type and cost before committing to a homesite³. Call the Macoupin County Public Health Department's Environmental Health office at 217-839-4111 for the application sequence and site-specific requirements¹. A separate private well permit is $100¹.

Unincorporated Macoupin County has no county zoning, so county zoning does not restrict RV occupancy, temporary camping, tiny-home occupancy, manufactured-home occupancy or accessory dwellings there¹. Inside a city or village, that municipality's zoning can say otherwise¹. Living space still needs a lawful sewage solution: a private septic permit of $300 is required countywide unless public sewer is available, and new construction needing septic triggers the $100 county building-program permit¹. Illinois allows manufactured homes as dwellings subject to state installation rules and any local building, floodplain and utility requirements⁹. Ask the GIS Manager/Plat Officer and Environmental Health how a specific RV or tiny home would be treated¹.

1. Confirm jurisdiction: ask whether the parcel lies in unincorporated Macoupin County or inside a city or village, because municipal zoning differs¹.
2. Call the GIS Manager/Plat Officer at 217-854-3181, extension 5050, and confirm the building-program permit, code documents and inspections for the project¹.
3. Contact Environmental Health about the septic site review, the $300 septic permit and a licensed contractor¹.
4. Obtain sewage plan approval before construction and give the health authority at least 48 hours' notice before septic work begins⁸.
5. Obtain the county's $100 building-program permit when the unincorporated new construction requires septic¹.
6. Secure a county well permit ($100) before drilling a new well¹; also get an IDOT permit before work within a state-maintained highway right-of-way when applicable⁴.

Start with the boundary: unincorporated Macoupin County has no county zoning, but a city or village may have its own zoning and permits¹. Price the wastewater solution early because only about 8.9% of county soils avoid severe limitations for a conventional septic drain field³. For a private water supply, Macoupin County requires a well permit from the Health Department before drilling a new well or sealing an abandoned one¹. If access touches a state-maintained road, IDOT requires approval before work in the right-of-way⁴. Construction in regulated waterways, floodplains and wetlands can require state and federal authorization¹⁰. The median property-tax bill is about $1,990 a year and the effective rate is about 1.6%, useful baselines to compare with the parcel's actual tax record³.