Do I need a permit for accessory dwelling unit (adu) in Unincorporated Effingham County?
Unincorporated Effingham County does not issue residential building permits. Effingham County has no zoning; building permits and certificates of occupancy in unincorporated areas are not required, per a County Engineer letter on the county site. Check the adjacent city for extraterritorial zoning (Effingham, Teutopolis). Right-of-way permits still apply.
The requirements below come from Illinois rules and describe the standard the work must still meet. They are not a statement that Unincorporated Effingham County will issue you a permit.
Most likely yes. Accessory dwelling unit (adu) usually requires a permit in Illinois. Confirm the specifics with Unincorporated Effingham County.
Illinois has no statewide law requiring cities or counties to allow accessory dwellings. HB 1813, the Accessory Dwelling Unit Permissibility Act, was re-referred to the House Rules Committee and did not become law, so local zoning still decides whether an ADU is allowed. The Illinois Energy Conservation Code applies to new residential buildings statewide, and where a local government does not regulate energy standards, construction is still subject to the Energy Efficient Building Act (20 ILCS 3125/20). The Smoke Detector Act requires hardwired, interconnected smoke detectors with battery or generator backup in any dwelling unit newly constructed, reconstructed or substantially remodeled (425 ILCS 60/3(f)).
Get your exact answer
Answer a few questions to see the specific permits, documents, and next steps for your accessory dwelling unit (adu) in Unincorporated Effingham County.
Check my projectDocuments you may need
- Building permit applicationLikely required
- Plat of survey or site plan showing the unit, setbacks, lot coverage and utility routesLikely required
- Construction drawings with floor plan, foundation, framing and energy code complianceLikely required
- Zoning approval confirming an accessory dwelling is allowed on the lotLikely required
- Plumbing permit and licensed plumber informationLikely required
Possible inspections
- Footing and foundation inspection
- Framing and rough electrical, plumbing and mechanical inspections
- Insulation inspection
- Final inspection and occupancy approval
Frequently asked questions
- Do I need a permit for accessory dwelling unit (adu) in Unincorporated Effingham County?
- Most likely yes. Accessory dwelling unit (adu) usually requires a permit in Illinois. Confirm the specifics with Unincorporated Effingham County. The documents and inspections sections on this page list what the building department typically asks for.
- Who issues the permit in Unincorporated Effingham County?
- The local building department for Unincorporated Effingham County handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.