Oak Park, IL Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Oak Park, 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
- Permit-exempt sheds
- One-story detached, floor area under 70 sq ft
- Larger sheds
- Need a permit under Section 105.1
- Fee break
- Accessory buildings under 500 sq ft skip plan review fee
- Historic districts
- Certificate of advisory review still required
- Code location
- Village Code § 7-1-2 (Sec. 105.2); § 7-8-2A
Summary
Oak Park exempts small one-story detached tool and storage sheds and playhouses from needing a building permit, but only under a strict floor-area cap set by the Village's amended Section 105.2. Anything larger falls back under the general permit requirement of Section 105.1, and accessory buildings under 500 square feet also skip the plan review fee under § 7-8-2.
Permits shall not be required for the following: Building: 1. One-story detached accessory structures used as tool and storage sheds, playhouses and similar uses provided the floor area does not exceed 120 is less than 70 square feet (11 m2).
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-9: Code current through: Ord. 26-159, passed - -2026).
Full Breakdown
2. The first item under 'Building' covers one-story detached accessory structures used as tool and storage sheds, playhouses, and similar uses, and exempts them from the permit requirement provided the floor area is under 70 square feet (11 m2), as printed in the code's own text. 1: the owner or owner's authorized agent must apply to the building official and obtain a permit before building it, and work performed without one is declared illegal and an unlawful act subject to administrative penalties. A, Plan Review Fee Conditions, in Chapter 7's Fees article, gives a different-sized break to a different set of structures: accessory buildings under 500 square feet, along with repairs to one-, two-, and three-family homes, are exempt from the Village's plan review fee, which is otherwise nonrefundable once paid.
That fee exemption applies even when the shed is large enough to need a permit; it only waives the plan review charge, not the permit itself. 2.
Violations & Fines
A shed that exceeds the small permit-exempt threshold and is built without first obtaining a permit from the building official violates § 7-1-2's amended Section 105.1: the work is declared illegal and an unlawful act, subject to administrative penalties under the code and any further Village Code fine. A shed within a designated historic district that skips the required certificate of advisory review faces the same exposure.
Frequently Asked Questions
How big can a shed be in Oak Park without a permit?
Do I still pay a plan review fee for a small shed in Oak Park?
Does a shed in an Oak Park historic district need extra approval?
Sources & Official References
Other rules in Oak Park
How Oak Park compares: Shed Permit Requirements by City·Compare Oak Park to another location·View the Illinois accessory structures overview
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