Built-in outdoor kitchens in St. Louis require permits through the Building Division: a building permit for the structure, a gas-line permit for natural-gas connections, an electrical permit, and a plumbing permit for sinks. Structures must comply with SLRC Title 26 (Zoning) accessory-structure setbacks. Properties in Local Historic Districts require Preservation Board review through the Cultural Resources Office.
St. Louis Building Division administers outdoor kitchen permits under the building, mechanical, plumbing, and electrical codes adopted in SLRC Title 25. A building permit is required for the masonry counter, structural slab, and any roofed pergola or pavilion. A mechanical permit is required for natural-gas line extensions to a built-in grill, including a pressure-test inspection coordinated with Spire (the local natural-gas utility) before service. A plumbing permit is required for any new sink, hose-bib, or ice-maker line connected to the water system. An electrical permit is required for outdoor GFCI outlets and lighting, which must be rated for damp/wet locations. Stationary propane tanks larger than 5 gallons require Fire Bureau review under IFC Chapter 61 (LP-Gas). Outdoor kitchens must comply with SLRC Title 26 (Zoning) accessory-structure setbacks — typically 3 ft minimum side and rear in single-family districts, with greater setbacks for roofed structures. Properties in any of St. Louis's Local Historic Districts (Lafayette Square, Soulard, Compton Heights, Central West End, Tower Grove East, Benton Park, Skinker-DeBaliviere, Hyde Park, Shaw, and others) must obtain Preliminary and Final review from the Preservation Board through the Cultural Resources Office before the Building Division issues a permit.
Building an outdoor kitchen without required permits is a SLRC Title 25 violation with stop-work orders and double permit fees on after-the-fact applications. Unpermitted gas-line work is particularly serious — the Fire Bureau can order shutdown and Spire can disconnect service. Local Historic District violations carry separate Preservation Board enforcement and orders to remove non-conforming work.
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