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Columbia, MO Swimming Pools & Spas: Fencing & Safety Requirements (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Minimum barrier height
48 inches above grade
Maximum opening size
no 4-inch sphere passage
Adopted standard
2018 ISPSC Section 305
Governing code
Code of Ordinances § 6-17

Summary

Columbia, Missouri requires a code-compliant barrier around every backyard pool and spa, minimum 48 inches tall with no gap wide enough for a 4-inch sphere, under the city's adopted 2018 ISPSC standard.

3109.2 Barrier requirements. Barrier requirements must meet the standards of the 2018 International Swimming Pool and Spa Code (ISPSC) Section 305. ... The top of the barrier shall be not less than 48 inches (1219 mm) above grade where measured on the side of the barrier that faces away from the pool or spa. ... Openings in the barrier shall not allow passage of a 4-inch-diameter (102 mm) sphere.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 138).

Full Breakdown

Columbia's amended Building Code, adopted at Code of Ordinances § 6-17, requires every pool and spa in the city to be surrounded by a barrier meeting the 2018 International Swimming Pool and Spa Code Section 305: minimum 48-inch height measured from grade on the side facing away from the pool, and openings that cannot pass a 4-inch sphere. The rule applies citywide in Columbia, Missouri, Boone County, to new pool construction, not to unincorporated county land, which follows separate county rules. The Division of Building and Site Development inspects the barrier before final approval.

Violations & Fines

A noncompliant barrier is a Building Code violation enforced by the Division of Building and Site Development; conviction is a misdemeanor punishable by a fine up to $500 or up to one year imprisonment under § 114.4, each day a separate offense.

Frequently Asked Questions

Is a fence required around a pool in Columbia, Missouri?
Yes. Columbia's Building Code (§ 6-17, IBC § 3109.2) requires pools and spas to be surrounded by a barrier meeting 2018 ISPSC Section 305: 48-inch minimum height and no 4-inch-sphere gaps.
Does this barrier rule apply outside Columbia in Boone County?
No: this is a City of Columbia Building Code ordinance. Unincorporated Boone County land is governed by separate county rules, not the city code.

Sources & Official References

Other rules in Columbia

Fence Regulations: Height LimitsLight RestrictionsPool PermitsSome RestrictionsNoise Ordinances: Decibel LimitsSome RestrictionsFence Regulations: Neighbor Fence RulesLight RestrictionsFence Regulations: Material RestrictionsSome RestrictionsAnimal Ordinances: Veterinary Clinic ZoningSome RestrictionsLandscaping Rules: Tree Removal & Heritage TreesSome Restrictions

All Columbia rules

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