Swimming pool permit rules in Longmont, CO — also covering above-ground pools, in-ground pools, and spa installations — set fencing, barrier, alarm, and inspection requirements.
Longmont requires a building permit for any swimming pool (in-ground or above-ground over 24 inches deep), spa, or hot tub. Permits are issued by Building Services at 385 Kimbark Street under the city's adopted 2021 International Codes (effective January 1, 2022). Pool barriers, electrical bonding, and gas/plumbing all require inspection.
Under Longmont's permit-requirements policy, swimming pools are listed as 'additions' requiring a building permit, and hot tubs are listed as 'appliances' requiring a permit. The city adopted the 2021 International Building Code, 2021 International Residential Code, 2021 International Fire Code, and the rest of the 2021 I-Code family effective January 1, 2022; this includes the residential pool/spa standards in IRC Appendix V (and the IBC pool provisions in Section 3109 and Appendix G). Permit application requires a site plan/Improvement Location Certificate, equipment specifications (pump, heater, electrical bonding), barrier details, and (for in-ground pools) a structural plan. Permits are issued at the Development Services Center, 385 Kimbark St., 8 a.m.-5 p.m. weekdays, or online through the Citizen Access portal (aca.ci.longmont.co.us/CitizenAccess/). Fees are determined at issuance and depend on valuation. A final inspection is required and the pool may not be filled or used until the barrier and all safety features pass inspection. Longmont plans to adopt the 2024 I-Codes effective July 1, 2026.
Installing a pool, spa, or hot tub without a permit can trigger stop-work orders, double permit fees, required exposure/removal of buried work for inspection, and code enforcement action. Filling and using a pool before final inspection passes is a violation and creates serious liability if a child is injured.
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