Shed permit rules in Kirkwood, MO — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Sheds in Kirkwood are accessory structures regulated under Chapter 25, Article V (Accessory Uses and Structures). They must be set back at least five feet from all lot lines, stay at least 10 feet from the principal building, and the total of all accessory structures may not exceed 7% of lot area or 1,500 square feet, whichever is less; sheds larger than 120 square feet or taller than 12 feet are major accessory structures requiring Architectural Review Board approval.
Kirkwood treats detached storage and utility sheds as accessory buildings under Chapter 25 (Zoning and Subdivision Code), Article V (Accessory Uses and Structures). The default rule is a minimum five-foot setback from all lot lines unless a more specific provision applies. Any accessory structure with a wall or facade length of 25 feet or more must maintain a side and rear yard setback equal to the side setback required for principal structures in the underlying zoning district (R-1, R-2, R-3, R-4, or R-5), which in larger-lot districts can be substantially greater than five feet. Detached accessory structures must be separated from the principal building by a minimum of 10 feet unless a reduced setback is permissible under the applicable building and fire codes. In all residential districts, the cumulative site coverage of all accessory structures under roof - including small sheds otherwise exempt from individual review - cannot exceed 7% of total lot area or 1,500 square feet, whichever is less. Small sheds of 120 square feet or less and 12 feet or less in height are subject to the basic setback rules but generally do not require Architectural Review Board (ARB) review. Major accessory structures - any shed larger than 120 square feet or taller than 12 feet - must comply with Article VII (Architectural Guidelines) and obtain ARB approval before a permit will issue. A building permit is issued by the Kirkwood Building Division (314-822-5823); construction is reviewed under the city's adopted building code (the 2015 International Residential Code with local amendments under Chapter 5 of the Municipal Code, in effect through March 31, 2026). Lots in any of Kirkwood's three local historic districts also require Historic Preservation review before exterior alterations, including new sheds. St. Louis County does not issue building permits inside Kirkwood city limits, but County permit thresholds (sheds over 200 square feet or 15 feet) are informative for unincorporated areas and may be referenced in dual-jurisdiction situations. Missouri's RSMo Chapter 67 reserves general police powers to the city; there is no state preemption that overrides Kirkwood's accessory-structure standards. Special floodplain or stormwater conditions may apply within the FEMA Special Flood Hazard Area along Meramec or Sugar Creek tributaries.
Building a shed without a required permit, encroaching into a required setback, exceeding the 7% / 1,500 square foot accessory coverage cap, placing a major shed without ARB approval, or installing a structure too close to the principal building is a zoning and building violation enforceable by Kirkwood Code Enforcement and the Building Division. Remedies include stop-work orders, mandatory removal or relocation of the structure, retroactive permitting, and fines under Chapter 1 of the Municipal Code.
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