St. Louis, MO Swimming Pools & Spas: Pool Permits (2026)
Swimming pool permit rules in St. Louis, MO, also covering above-ground pools, in-ground pools, and spa installations, set fencing, barrier, alarm, and inspection requirements.
Key Facts
- Permit required
- before construction, install, or enlargement
- Exempt pools
- under 24 in. deep, under 250 sq ft
- In-ground plans
- sealed by MO-licensed designer
- Rear/side setback
- 6 feet from property line
- Street setback
- 10 feet from street line
Summary
St. Louis requires a building permit and approved construction documents before any pool, spa, or hot tub is built, installed, enlarged, or altered.
A swimming pool, spa or hot tub or appurtenances thereto shall not be constructed, installed, enlarged, or altered until construction documents have been submitted and a permit has been obtained from the building official. The approval of all authorities having jurisdiction over swimming pools shall be obtained before a permit can be issued.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 11).
Full Breakdown
Under the City's amended Building Code, no swimming pool, spa, or hot tub may be constructed, installed, enlarged, or altered until construction documents are submitted and a permit is issued by the building official, with sign-off from every authority with jurisdiction over pools. In-ground pool plans must be sealed by a Missouri-licensed design professional. The code exempts only pools under 24 inches deep with less than 250 square feet of surface area that lack a recirculating system or structural materials. Sited pools must clear 6 feet from rear or side lot lines and 10 feet from any street property line.
Violations & Fines
Building without a permit or approved plans is enforced by the Building Division as a Building Code violation; the building official can order work stopped and require the pool brought into compliance or removed.
Frequently Asked Questions
Do I need a permit for a small above-ground pool in St. Louis?
Who approves the pool permit application?
Sources & Official References
Other rules in St. Louis
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