Jefferson County enforces residential pool barrier rules through the 2018 IRC (effective until June 30, 2026) and the 2024 IRC (effective July 1, 2026), as modified by the Jefferson County Residential Code Supplement. Barriers must be at least 60 inches high (stricter than the IRC 48-inch baseline) with self-closing, self-latching gates and the latch a minimum of 54 inches above the ground. Picket spacing on wrought iron fences may not exceed 4 inches.
Colorado has no statewide residential pool barrier statute (5 CCR 1003-5 governs public and semi-public pools, not private residential pools). Jefferson County enforces residential barrier rules through its adopted building codes: the 2018 International Residential Code is in effect until June 30, 2026; the 2024 IRC and 2024 IBC become effective July 1, 2026. The Jefferson County 2018 Residential Code Supplement (July 2021) modifies IRC Appendix G to require a barrier minimum of 60 inches (stricter than the IRC default of 48 inches) for any pool, hot tub, or spa with water depth greater than 24 inches. Gates must be self-closing and self-latching, opening outward away from the pool, with the latch release at least 54 inches above the ground. Wrought iron picket spacing may not exceed 4 inches. Where a dwelling wall serves as part of the barrier, doors with direct pool access must have an alarm or self-closing/self-latching device. Building permits are required and are issued through the Jefferson County Citizen Portal; final inspection verifies barrier compliance before pool use.
Installing a pool, hot tub, or spa without a building permit, or with a non-compliant barrier (less than 60 inches, gate not self-closing, latch under 54 inches, or picket spacing over 4 inches), violates the Jefferson County adopted Residential Code. Non-compliant installations are subject to stop-work orders, denial of final inspection, after-the-fact permitting, and code-enforcement fines until corrected.
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See how Jefferson County's fencing requirements rules stack up against other locations.
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