Swimming pool rules in Woodside, California
Yes, with a building permit. Pools, spas and hot tubs in Woodside must meet the same setbacks as the house (in R-1, 30 feet front, 25 feet rear and 15 feet sides), need a geotechnical report, and new outdoor pools and spas need a cover. The Town's pool handout (dated December 2019) also bars pools on slopes over 35% and requires a state-compliant barrier.
| Permit | Building permit for all pools, spas and hot tubs [1] |
| Setbacks | Same as the main house in the zoning district [2] |
| Steep slopes | No pools, spas or hot tubs on slopes over 35% or in natural-state areas [3] |
| Cover | Required for new outdoor pools and spas when not in use [4] |
| Geotechnical report | Required for all swimming pools [5] |
| Cuts and fills for pool decks | Max 6 ft high [6] |
| Grading over 1,500 cubic yards | Grading exception from the Planning Commission [7] |
| Barrier | Per state Swimming Pool Safety Act and CBC 3109.4; fence permit if a fence is the barrier [8] |
Permits and review
Some submittal details here come from the Building Division's pool handout, dated December 2019, and may have changed. All pools, spas and hot tubs need a building permit [1]. Larger grading jobs also need a site development permit under Chapter 151 (the code exempts pool excavation itself up to 1,500 cubic yards). Projects whose pool, lighting or other parts don't fit the Town's design criteria go to the Architectural and Site Review Board or Administrator before you apply. Grading over 1,500 cubic yards, or cuts and fills over 8 ft, needs a grading exception, which the Planning Commission decides after a hearing [7]. The Town requires a geotechnical report for every swimming pool [5].
Where it can go
Swimming pools must meet the same setbacks as the main house in each zoning district [2]. In R-1 that's 30 ft from the front, 25 ft from the rear and 15 ft from the sides. In SR it's 50 ft front, 25 ft rear and 20 ft side, and in RR and SCP it's 50 ft on all sides (see Sheds for setback details). Pools, spas and hot tubs aren't allowed on slopes steeper than 35% or in areas kept in a natural state [3]. Pool and decking count toward the lot's paved-area coverage limit. Cuts and fills for decks or terraces around a pool can't exceed 6 ft in height [6]. Keep the pool 25 ft from a septic leach field.
Covers and safety
Woodside's water-efficient landscape rules require covers for all new outdoor pools and spas when they're not in use [4]. The pool must be enclosed by a barrier meeting the state Swimming Pool Safety Act and California Building Code §3109.4. The barrier must be installed before the pool is filled, and a fence permit is required if a fence serves as the barrier [8]. New and remodeled pools at single-family homes also need two of the seven state drowning-prevention features.
Hot tubs
The code defines a private swimming pool as a water-holding structure 24 inches or more deep with filtration. The Building Division applies the same setback, cover and permit requirements to spas and hot tubs.
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Next steps
- Check setbacks, slope (no pools on slopes over 35%) and paved-area coverage for your lot with the Planning Department (650-851-6790).
- Hire a geotechnical engineer and prepare a soils report, structural calculations, a grading/drainage plan and a site plan showing setbacks and coverage.
- Submit a building permit application to the Woodside Building Division (650-851-6796) with plans showing the barrier or ASTM safety cover; add a fence permit if a fence is the barrier.
- Submit the CF2R-PLB-03-E energy form before the pre-plaster inspection.
Common questions
- Do I need a permit for a pool in Woodside, California?
- Yes. All pools, spas and hot tubs in Woodside need a building permit, and the Town requires a geotechnical report for every swimming pool. Larger grading jobs may also need a site development permit or a grading exception.
- What are the pool setbacks in Woodside, California?
- Pools must meet the same setbacks as the main house. In R-1 that's 30 ft from the front, 25 ft from the rear and 15 ft from the sides; in SR it's 50 ft front, 25 ft rear and 20 ft side; in RR and SCP it's 50 ft on all sides.
- Can I build a pool on a slope in Woodside, California?
- Not on a steep one. Pools, spas and hot tubs aren't allowed on slopes steeper than 35% or in areas kept in a natural state, and cuts and fills for pool decks can't exceed 6 ft in height.
- Does a hot tub need a permit in Woodside, California?
- Yes. The Building Division applies the same building permit, setback and cover requirements to spas and hot tubs as to pools. New outdoor pools and spas need a cover when not in use.
- What are the pool fence requirements in Woodside, California?
- The pool must be enclosed by a barrier meeting the state Swimming Pool Safety Act and California Building Code §3109.4, installed before the pool is filled. A fence permit is required if a fence serves as the barrier.
California state rules for swimming pools
Pools need a city or county building permit, and local zoning sets setbacks. The state's Swimming Pool Safety Act (Health & Safety Code §115920 et seq.) adds safety rules:
- Drowning prevention features: when a building permit is issued for a new pool or spa, or to remodel one, at a private single-family home, it must have at least two of seven safety features (§115922):
- an enclosure that isolates the pool from the house
- removable mesh fencing (ASTM F2286) with a self-closing, self-latching gate
- a safety pool cover (ASTM F1346-23)
- exit alarms on doors and windows that open directly to the pool
- self-closing, self-latching devices on those doors, released at least 54 inches up
- a pool alarm (ASTM F2208; child-worn alarms don't count)
- other equally protective, independently verified means
- Some pairs don't count, such as a safety cover plus a pool alarm. The building official inspects before final approval.
- Enclosure standards (§115923): at least 60 inches high, no more than 2 inches of clearance at the bottom, gaps that won't pass a 4-inch sphere, no handholds or footholds, and gates that open away from the pool with self-latches at least 60 inches up.
- What counts as a pool: any structure with water over 18 inches deep, including above-ground pools, hot tubs and spas (§115921). Spas with a locking ASTM F1346 cover, apartment complexes and public pools are exempt (§115925).
- Small pools: the 2025 Residential Code exempts prefabricated pools under 24 inches deep from a building permit.
What the ordinance says
- Submittal Requirements: Swimming Pools and/or Hot Tubs, Permit Requirements, Submittal Requirements: Swimming Pools and/or Hot Tubs (Building Division), p. 2
Pools, spas, & hot tubs all require a Building Permit
- Sec. 153.207(A)(7), Municipal Code §153.207 Setbacks (ministerial and discretionary exceptions)
Swimming pools shall conform to the same setback requirements as the principal structure within each zoning district.
- Submittal Requirements: Swimming Pools and/or Hot Tubs, Area Calculation, Submittal Requirements: Swimming Pools and/or Hot Tubs (Building Division), p. 1
No pools, spas, or hot tubs are allowed in areas with slopes exceeding 35%, or areas being retained in a Natural State
- Sec. 150.40(1), Municipal Code Ch. 150 Building Regulations (§150.01 building code amendments; §150.40 pool/spa covers)
Section 492.6(a)(2)(D) is modified as follows: "Covers are required for outdoor pools and outdoor spas, when not in use, for all new outdoor pools and outdoor spas constructed after the effective date of this ordinance."
- Sec. 151.58, Municipal Code Ch. 151 Site Development (§151.42 Sport courts and swimming pools)
A geotechnical report shall be required for all swimming pools and buildings for human occupancy.
- Sec. 151.42, Municipal Code Ch. 151 Site Development (§151.42 Sport courts and swimming pools)
Cuts and fills for such accessory uses as sport courts and decking or terraces around swimming pools shall not exceed a height of six feet measured vertically from the toe to the top of the slope.
- Sec. 151.22(B), Municipal Code Ch. 151 Site Development (§151.42 Sport courts and swimming pools)
Grading work in excess of 1,500 cubic yards, and cuts and fills exceeding eight feet, require a grading exception.
- Submittal Requirements: Swimming Pools and/or Hot Tubs, Pool Barrier Requirements, Submittal Requirements: Swimming Pools and/or Hot Tubs (Building Division), p. 1
A Fence Permit is required if a fence is to be used as the pool barrier.