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San Luis Obispo County, CA Swimming Pools & Spas: Fencing & Safety Requirements (2026)

Q: Does my hot tub need a fence in unincorporated SLO County?

Not if it is a self-contained spa (one-piece factory unit where heater/pump/controls are all under the skirt) with a locking safety cover that complies with ASTM F1346-91. Non-self-contained spas are treated as swimming pools and require the full 60-inch enclosure under BLD-1054 and County Code 15.04.320.

Q: Can the wall of my house serve as part of the pool enclosure?

Yes. BLD-1054 illustrates three acceptable configurations: pool isolated by enclosure, home as part of the enclosure, and boundary-line enclosure. When the house is part of the enclosure, one of the additional safety features in HSC 115922(b) (exit alarm, self-closing door, pool cover, etc.) is still required.

Q: How high does the gate latch need to be?

The self-latching device on a pool access gate must be placed no lower than 60 inches above the ground (HSC 115923 / CBC 3109 / BLD-1054). Door-mounted self-closing/self-latching devices serving as the secondary safety feature have a lower 54-inch minimum.

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified June 2026

Key Facts

Minimum Barrier Height: 60 inches (5 feet)
Max Ground Clearance: 2 inches
Max Gap/Opening: <4-inch sphere
Gate Direction: Opens away from pool, self-closing/latching
Latch Height: 60 inches minimum above ground
Code Citation: CBC § 3109; P.C.C. 15.04.320; HSC 115923
Self-Contained Spa Exemption: Yes, with ASTM F1346-91 cover

Summary

Residential pools and non-self-contained spas in unincorporated San Luis Obispo County must be enclosed by a permanent, non-removable barrier at least 60 inches tall before they can be filled with water, per CBC Section 3109 and County Code 15.04.320.

These county ordinances apply to unincorporated areas of San Luis Obispo County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

The pool or spa shall be equipped with a permanent, non-removable enclosure... a. Any access gates through the enclosure open away from the swimming pool and are self-closing with a self-latching device placed no lower than 60 inches above the ground. b. The top of the enclosure shall be at least 60 inches above grade... c. Maximum vertical clearance from the ground to the bottom of the enclosure of 2 inches. d. Gaps or voids, if any, do not allow passage of a sphere equal to or greater than 4-inch in diameter.

Source: SLO County Planning & Building BLD-1054 - Barrier Requirements for Residential Pool & SpaView official code

Full Breakdown

County handout BLD-1054 (07/09/2024) implements the California Swimming Pool Safety Act (Health and Safety Code Section 115922-115923) and CBC Section 3109 for unincorporated areas. The enclosure must be at least 60 inches above grade measured from the outside (the side facing away from the pool), have no more than 2 inches of vertical clearance between the ground and the bottom of the barrier, and have no gaps that allow passage of a 4-inch sphere. The outside surface must be free of handholds or footholds that a child under five could use to climb.

Access gates must open away from the pool, be self-closing and self-latching, with the latch placed no lower than 60 inches above the ground. ' Driveway gates that form part of the enclosure must be electronically operated and auto-close within one minute. Self-contained spas with an ASTM F1346-91 locking safety cover are exempt from the fence requirement.

Violations & Fines

Building inspector will not approve final inspection and the pool cannot be filled with water until a compliant enclosure is in place. Maintaining the enclosure is the ongoing responsibility of the owner/occupant per BLD-1054. Failing or absent barriers can also expose the owner to civil liability under the Swimming Pool Safety Act.

Frequently Asked Questions

Does my hot tub need a fence in unincorporated SLO County?

Not if it is a self-contained spa (one-piece factory unit where heater/pump/controls are all under the skirt) with a locking safety cover that complies with ASTM F1346-91. Non-self-contained spas are treated as swimming pools and require the full 60-inch enclosure under BLD-1054 and County Code 15.04.320.

Can the wall of my house serve as part of the pool enclosure?

Yes. BLD-1054 illustrates three acceptable configurations: pool isolated by enclosure, home as part of the enclosure, and boundary-line enclosure. When the house is part of the enclosure, one of the additional safety features in HSC 115922(b) (exit alarm, self-closing door, pool cover, etc.) is still required.

How high does the gate latch need to be?

The self-latching device on a pool access gate must be placed no lower than 60 inches above the ground (HSC 115923 / CBC 3109 / BLD-1054). Door-mounted self-closing/self-latching devices serving as the secondary safety feature have a lower 54-inch minimum.

Sources & Official References

Other rules in San Luis Obispo County

Pool PermitsSome Restrictions Parking Rules: Abandoned VehiclesSignificant Restrictions Animal Ordinances: BeekeepingSome Restrictions Landscaping Rules: Native PlantsFew Restrictions Special Events & Permits: Parade PermitsLight Restrictions Gambling & Gaming: Card Room LicensingSignificant Restrictions Local Taxes & Fees: Business Tax ClassificationSome Restrictions

All San Luis Obispo County rules

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