Most renovation work in unincorporated Cook County requires building permits. Permits are needed for structural modifications, electrical, plumbing, mechanical work, and changes to building systems. Cosmetic work like painting and flooring does not require permits.
Under the Cook County Building Code, permits are required for renovation work including: structural alterations, removal or modification of load-bearing walls, electrical work (new circuits, panel upgrades, wiring), plumbing modifications (adding fixtures, rerouting pipes), HVAC replacement or installation, roofing replacement, window and door replacements that change structural openings, bathroom and kitchen remodels involving plumbing or electrical changes, and basement finishing or conversions. Work that does not require permits includes: painting, wallpapering, floor covering installation, replacing fixtures in kind (same type, same location), and minor cosmetic repairs. The permit process involves submitting plans through the ePermit portal or in-person, plan review by the Building and Zoning department, permit issuance, inspections during construction, and final inspection. Licensed contractors are required for electrical, plumbing, and structural work. The department offers online services for many permit types through the ePermit portal.
Work without a permit requires an after-the-fact application, may incur double permit fees, and may require opening walls for inspection. Stop-work orders can be issued for active unpermitted work.
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