Ontario, CA Swimming Pools & Spas: Pool Permits (2026)
Swimming pool permit rules in Ontario, CA, also covering above-ground pools, in-ground pools, and spa installations, set fencing, barrier, alarm, and inspection requirements.
Key Facts
- Permit required
- Yes - plan check and permit fees by job valuation
- Engineered drawings
- Wet signature of civil/structural engineer of record
- Site plan must show
- Property lines, structures, slopes, walls, gates, fences, barriers
- Gunite special inspection
- Required for surcharge or pools within 7 ft of slope top
- Issuing office
- Building Department, 303 E. B Street (909-395-2023)
- Barrier timing
- Installed, inspected, approved before plaster and fill
Summary
A City of Ontario Building Department permit, plan check, and engineered drawings are required to build a residential swimming pool, and site plans must show all property lines, structures, slopes, walls, gates, fences, and barriers controlling access to the pool.
The Department policy for plan review, permits and inspections for swimming pools are as follows: 1. All drawings, including the site plan, shall have a 'wet' signature by the civil/structural engineer of record. 2. Every pool drawing submitted is required to pay a plan check fee and permit fees based on the job valuation. 3. Site plans shall indicate all property lines, structures, slopes and walls, including all gates and fences and barriers with regard to access to the pool. 4. Special inspections for shotcrete (gunite) is required only when: A. The engineer of record indicates the necessity of such on the plans. B. The pool is designed for a surcharge; for instance, retaining walls, houses, solid covered patios and deck footings. ... C. The pool walls within a horizontal distance of seven (7) feet from the top of a slope shall be capable of supporting the water in the pool without soil support (when the pool wall is designed as a freestanding wall).
Official source re-checked September 7, 2026: the cited page had not changed since it was quoted.
Full Breakdown
Under the Building Official's policy memorandum 'New Requirements for Swimming Pools' (Feb. 7, 2008), every pool project requires a plan check fee and permit fees based on job valuation, and all drawings including the site plan must bear a 'wet' (original) signature of the civil or structural engineer of record. Site plans must indicate all property lines, structures, slopes, and walls, including all gates, fences, and barriers with regard to access to the pool. Special inspection for shotcrete (gunite) is required only when the engineer of record indicates it on the plans, when the pool is designed for a surcharge (for example from retaining walls, houses, solid-covered patios, or deck footings), or when the pool walls fall within seven feet horizontally of the top of a slope and must be designed to support the water without soil support.
Swimming pool site plans and structural drawings are reviewed over the counter by plan checkers once the counter technicians confirm the basic information has been provided. Pool construction is reviewed under the currently adopted California Building, Residential, Electrical, and Plumbing Codes, and the required barrier (see fencing requirements) must be installed, inspected, and approved before plastering and filling. The Building Department is located at 303 East B Street, Civic Center, Ontario (909-395-2023).
Violations & Fines
Building a pool without a permit, without engineer-stamped drawings, or without the required plan check and inspections violates the adopted California Building Code as enforced by Ontario. The pool cannot be plastered or filled until the barrier and alarms are inspected and approved, and unpermitted work can be subject to stop-work orders, exposure for inspection, and code-enforcement action.
Frequently Asked Questions
Do I need engineered plans for a backyard pool in Ontario?
When is a special gunite (shotcrete) inspection required?
Where do I submit pool plans?
Sources & Official References
Other rules in Ontario
California rules heatmap·Compare Ontario to another location·View the California swimming pools & spas overview
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Pool Permits in Nearby Cities
How other cities in San Bernardino County handle pool permits.