Building Safety in Winnebago County, IL (2026)
4 county-level rules, plus city-specific rules for 1 city in Winnebago County, Illinois.
Verified from official government sources
Carbon Monoxide Detectors
Winnebago County requires every dwelling unit in the unincorporated county to have a carbon monoxide detector, mandated under the county's adopted International Property Maintenance Code and the Illinois Carbon Monoxide Detector Act. The Winnebago County Health Department's Neighborhood Code Enforcement Program enforces the rule, issuing notices of violation and pursuing fines up to $500.00 per day for noncompliance under the county's general penalty ordinance.
Winnebago County Carbon Monoxide Detector Rule
Some RestrictionsWinnebago County Code of Ordinances § 18-401(30) (IPMC § 305.7)
(30)Section 305.7 is added to read as follows: 305.7 Carbon monoxide detector. Every dwelling unit shall be outfitted with a carbon monoxide detector as required by the Illinois Carbon Monoxide Detector Act, 430 ILCS 135/1 et seq.
Building Permits
Winnebago County requires a building permit from the county building official before you construct, enlarge, alter, demolish, or change the occupancy or use of a structure in unincorporated areas, with ordinary repairs exempted.
Winnebago County Building Permit Requirements
Some RestrictionsWinnebago County Code of Ordinances § 18-3(a)
It shall be unlawful to construct, enlarge, alter or demolish a structure; change the occupancy of a building or structure requiring greater strength, exitway or sanitary provisions; to change to another use...without first filing an application with the building official in writing and obtaining the required permit therefor; except that ordinary repair...shall be exempt from this provision.
Electrical Permits
Winnebago County requires a permit before any electrical work begins in the unincorporated county, issued under the 2014 National Electrical Code as locally amended. Fees follow the chapter 18 permit schedule set by the county board, and starting work before the permit issues doubles the fee. Low-voltage wiring like phone lines is exempt, but fire-alarm and smoke-control wiring is not.
Winnebago County Electrical Work Permit Rule
Some RestrictionsWinnebago County, IL Code of Ordinances § 18-58
(a)Permit fees. Permit fees for all electrical work shall be as set forth in section 18-3, Permits and fees.(b)Double fee penalty. When a permit is required by this Code and the work is started or proceeded with, prior to obtaining said permit the fees above specified shall be doubled. (Exception: Emergency work requirements will be handled on a case by case basis.)(c)Low voltage permits. A per...
Plumbing Permits
Winnebago County adopts the 2014 Illinois State Plumbing Code by reference for all plumbing work, with local amendments and permit fees under the county building code.
Winnebago County Adopted Plumbing Code
Some RestrictionsWinnebago County Code § 18-346
The 2014 Illinois State Plumbing Code is hereby adopted by reference thereto as though fully set forth in this section and the whole thereof, save and except those portions as are deleted, modified, or amended in section 18-347, three copies of which have been on file in the office of the county clerk for use and examination by the public for at least 30 days prior to the adoption thereof.
Building Safety by City in Winnebago County
1 cities in Winnebago County have their own building safety rules. Each link goes to that city's dedicated page with code citations.
All Winnebago County ordinances
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