Longmont follows the 2021 International Fire Code (LMC Chapter 16.32, Ord. O-2021-66) Chapter 61 for liquefied petroleum gas storage and use. Longmont Fire Services specifies that propane devices are not allowed on balconies or within 10 feet of combustible construction, with exceptions for one- and two-family dwellings, fully sprinklered properties, and small LP-gas containers of 2.5 pounds or less. Natural gas appliances may be permanently installed per the Mechanical Code and manufacturer specifications.
Longmont's propane and LP-gas rules come from the 2021 International Fire Code (IFC) Chapter 61, adopted via LMC Chapter 16.32 (Ordinance O-2021-66). Longmont Fire Services states that propane devices and LP-gas containers are not allowed on balconies or within 10 feet of combustible construction. Three exceptions apply: (1) one- or two-family dwellings, (2) fully sprinkler-protected properties, and (3) small LP-gas containers of 2.5 pounds or less (consistent with IFC Chapter 61 size thresholds). This effectively bars charcoal grills and full-size propane grills on multi-family apartment balconies but permits small portable canisters used for camp stoves and similar low-volume devices. Natural gas appliances (BBQs, fire features) are allowed if permanently installed per the Mechanical Code and manufacturer specifications. Larger propane container installations, refilling stations, and bulk storage are governed by IFC Chapter 61 with NFPA 58 (Liquefied Petroleum Gas Code) referenced; commercial installations must comply with IFC permit requirements administered by Longmont Fire Codes and Planning at 303-774-4471. Storage indoors is limited; tanks should be stored upright outside in a well-ventilated area, away from heat sources and ignition.
Violations of LP-gas storage and use rules are enforced under the 2021 IFC (LMC Chapter 16.32) by Longmont Fire Codes and Planning. Property managers can be cited for grills/propane on apartment balconies. Larger commercial LP-gas installations without an IFC permit are subject to stop-work and citation. Contact Fire Codes and Planning at 303-774-4471 (jason.o'donnell@longmontcolorado.gov).
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