Boone County, MO Swimming Pools & Spas: Pool Permits (2026)
Swimming pool permit rules in Boone County, MO, also covering above-ground pools, in-ground pools, and spa installations, set fencing, barrier, alarm, and inspection requirements.
Key Facts
- Barrier gap limit
- 4 inches max atop pool wall
- Barrier option
- Pool wall itself may serve as barrier
- Covers
- In-ground, above-ground, hot tubs, spas
- Authority
- Commission Order 140-2014 / IRC Appendix G
Summary
In unincorporated Boone County, an above-ground pool's own wall can serve as the required safety barrier; where a separate barrier sits on top of the pool structure, the gap can't exceed 4 inches.
Outdoor swimming pool: An outdoor swimming pool, including an in-ground, above-ground pool, hot tub or spa shall be surrounded by a barrier which shall comply with the following: ... Where the top of the pool structure is above grade, such as an above ground pool, the barrier may be at ground level, such as the pool structure, or mounted on top of the pool structure. Where the barrier is mounted on top of the pool structure, the maximum vertical clearance between the top of the pool structure and the bottom of the barrier shall be four (4) inches (102mm).
Official source re-checked September 7, 2026: the cited page had not changed since it was quoted.
Full Breakdown
Boone County's Building Code Addendum amends IRC Appendix G, adopted per County Commission Order 140-2014, to cover outdoor pools generally, in-ground, above-ground, hot tubs and spas alike, with a protective barrier. For an above-ground pool, the pool structure itself can serve as that barrier at ground level, or a separate barrier can be mounted on top of the pool wall instead. Where the barrier sits on top of the structure, the vertical clearance between the top of the pool wall and the bottom of the barrier cannot exceed four inches, closing off a gap a child could use to climb over.
Violations & Fines
Installing an above-ground pool without a compliant barrier, or leaving more than a 4-inch gap where a barrier is mounted atop the pool wall, is a Building Code violation subject to inspection failure or a stop-work order.
Frequently Asked Questions
Does an above-ground pool need a separate fence in Boone County?
How big a gap is allowed if the barrier sits on top of the pool?
Sources & Official References
Other rules in Boone County
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