Larimer County, CO Swimming Pools & Spas: Pool Permits (2026)
Swimming pool permit rules in Larimer County, CO, also covering above-ground pools, in-ground pools, and spa installations, set fencing, barrier, alarm, and inspection requirements.
Key Facts
- Barrier threshold
- Pools over 24 inches deep
- Above-grade barrier
- On grade or on pool top
- Mesh fence limit
- Not on on-ground pools
- Ladders
- Removable or secured
- Submittal
- Manufacturer specs required
Summary
Above-ground pools deeper than 24 inches in unincorporated Larimer County still need a barrier. Where the pool is above grade, the barrier may be installed on grade or mounted on top of the pool structure. Mesh fences may not be installed on top of on-ground pools.
Where the pool or spa is above grade, the barrier shall be installed on grade or mounted on top of the pool or spa. ... Mesh fences shall not be installed on top of on ground residential pools.
Full Breakdown
The adopted 2021 ISPSC treats above-ground and on-ground pools the same as in-ground pools for barrier purposes once they exceed 24 inches deep. If the pool wall itself serves as the barrier it must meet the 48-inch effective height and the 4-inch sphere rule, and any ladder or steps must be removable or secured against access. On-ground storable pools require manufacturer specifications for the pool, ladders/stairs, and circulation equipment at permit submittal. Mesh barrier fences cannot be mounted on top of on-ground residential pools.
Violations & Fines
An above-ground pool without a compliant barrier or with an unsecured ladder fails inspection and may not be filled or used until corrected.
Frequently Asked Questions
Does my above-ground pool need a fence?
Can I put a mesh fence on the pool rim?
Sources & Official References
Other rules in Larimer County
Compare Larimer County to another location·View the Colorado swimming pools & spas overview
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