Will County, IL Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Will County, IL, also referred to as storage shed, backyard shed, or accessory building regulations, set size limits, setbacks, and when a building permit is required.
Key Facts
- Rear setback (accessory)
- 5 feet, all residential districts
- Max accessory area
- 1,200-3,000 sq. ft. by district
- Max accessory height
- 25 feet
- Permit needed
- Yes, even sub-200 sq. ft. sheds
- Small-shed permit fee
- $75 flat rate
Summary
Unincorporated Will County caps accessory buildings at 1,200-3,000 sq. ft. depending on district, allows a 5-foot rear setback, and requires a building permit even for the smallest sheds.
E-1 E-2 R-1 R-2 R-2A R-3 R-4 R-5 R-6 S4 Rear (Accessory Structures) 5 5 5 5 5 5 5 5 5 B2 Maximum Acc. Building Area (sq. ft.) 3,000 3,000 1,800 1,800 1,800 1,500 1,200 1,200 1,200 Accessory Buildings [height] 25 25 25 25 25 25 25 25 25
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2025 S-25: Supplement contains: Local legislation current through Ordinance No. 24-100, passed 4-18-2024 and Res. 23-387, passed 11-16-2023; and State legislation approved through 2024 Pamphlet #2).
Full Breakdown
In unincorporated Will County, sheds and detached garages are accessory buildings under the residential zoning table of Code § 155-3.30(B): they may sit as close as 5 feet to the rear lot line in every residential district (E-1 through R-6), versus 25-80 feet for the house itself, but must still meet the district's standard side setback. Maximum accessory building floor area ranges from 3,000 sq. ft. in the large-lot E-1/E-2 districts down to 1,200 sq. ft. in R-4/R-5/R-6, and accessory buildings are capped at 25 feet in height. A building permit is required regardless of size: even a shed under 200 sq. ft. without a concrete slab is billed at the flat $75 permit rate under § 158.02, with fees scaling up by square footage for larger structures. This applies only to unincorporated county land; Joliet, Bolingbrook, Romeoville, Plainfield and Lockport enforce their own municipal codes.
Violations & Fines
Building without a permit doubles the applicable permit fee under § 158.02 item 16; a shed that violates the setback or size table is a zoning violation subject to the county's standard zoning enforcement remedies.
Frequently Asked Questions
How close to my property line can I put a shed in Will County?
Do I need a permit for a small shed?
Sources & Official References
Other rules in Will County
How Will County compares: Shed Permit Requirements by City·Compare Will County to another location·View the Illinois accessory structures overview
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