Swimming pool rules in Pasadena, California
Pools and hot tubs are allowed as accessory structures on residential lots, but the pool, hot tub and all related equipment must be at least 5 feet from every property line and can't go in the front or corner-side setback. Pasadena's zoning code doesn't add its own barrier rules; the state pool safety law sets fencing requirements.
| Pools are | Accessory structures/uses on residential lots [1] |
| Setback from property lines (pool, hot tub, equipment) | 5 ft [2] |
| Front or corner-side setback | Not allowed [3] |
| Separation from other buildings | 6-ft rule doesn't apply to pools or hot tubs [4] |
| Timing | Can't be built before the main house [5] |
| Pool fence height (front setback / side and rear next to homes) | 4 ft, 50% open / 6 ft [6] |
Pools are accessory structures
Pasadena's zoning code lists a pool, or a hot tub and related equipment, among the accessory uses and structures allowed with a home [1]. That means the general accessory-structure rules apply: an accessory structure can't occupy a required front or corner side setback [3], it can't be built before the main structure [5], and it may sit in a required side or rear setback only if it is more than 100 feet from the front property line or in the rear 25 feet of the lot (the code doesn't say whether this placement rule is applied to in-ground pools; ask Planning).
Setbacks
Pools, hot tubs, related equipment (pumps, filters, heaters) and all mechanical equipment must be at least 5 feet from any property line [2]. The Zoning Administrator can modify that distance for pool equipment next to an alley. Unlike sheds and other accessory buildings, pools and hot tubs are exempt from the 6-foot separation required between structures on the same lot [4].
Fences around the pool
The zoning sections reviewed don't set pool barrier standards; the state Swimming Pool Safety Act applies (shown separately on this page). A pool fence still has to meet Pasadena's fence height limits in the RS and RM-12 zones: 4 feet and at least 50% open in the front setback [6], and 6 feet in interior side and rear setbacks next to other homes [7]. Outdoor lighting for a private sport court or similar recreational facility needs a Minor Conditional Use Permit, and fences for that facility are reviewed in the same permit.
Above-ground pools and spas
The local text doesn't distinguish above-ground from in-ground pools; the 5-foot setback covers pools and hot tubs alike. Covered structures such as cabanas count toward the lot's accessory-structure floor-area cap (600 sq ft or 6% of the lot on RS lots).
Permits
The zoning code sections reviewed don't spell out the building permit process; new pools and spas need a building permit under state law, which also triggers the state drowning-prevention requirements. Check with the Building Division.
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Next steps
- Draw a site plan showing the pool, spa and equipment at least 5 ft from every property line and outside the front and corner-side setbacks.
- Choose at least two state-required drowning-prevention features (e.g., an isolating enclosure plus door alarms) for the permit plans.
- Apply for a pool building permit at the Planning & Community Development Permit Center (175 N. Garfield Ave., 626-744-4200).
Common questions
- Do I need a permit for a pool in Pasadena, California?
- Yes. Apply for a pool building permit at the Planning & Community Development Permit Center. Pools and hot tubs are allowed as accessory structures on residential lots.
- How far must a pool be from the property line in Pasadena, California?
- The pool, hot tub and all related equipment must be at least 5 feet from every property line. They can't go in the front or corner-side setback.
- Does Pasadena, California have its own pool fence rules?
- Pasadena's zoning code doesn't add its own barrier rules; the state pool safety law sets fencing requirements. Zoning limits pool fences to 4 ft and 50% open in the front setback, and 6 ft on sides and rear next to homes.
- Can I build a pool before the house in Pasadena, California?
- No. A pool can't be built before the main house.
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
- Sec. 17.50.250.A, Zoning Code Chapter 17.50 - Standards for Specific Land Uses (ADUs 17.50.275, accessory structures 17.50.250, home occupations 17.50.110, short-term rentals 17.50.296)
Accessory structures shall be limited to uses which are accessory to the main use, including but not limited to, cabana, garage or carport, gazebo, greenhouse, pergola, pool, or hot tub and related equipment, or workshop.
- Sec. 17.50.250.F.3, Zoning Code Chapter 17.50 - Standards for Specific Land Uses (ADUs 17.50.275, accessory structures 17.50.250, home occupations 17.50.110, short-term rentals 17.50.296)
Pools, hot tubs, and related equipment, and all mechanical equipment shall not be closer than five feet from a property line. The Zoning Administrator may modify this requirement for pool equipment when adjacent to an alley.
- Sec. 17.50.250.D.1, Zoning Code Chapter 17.50 - Standards for Specific Land Uses (ADUs 17.50.275, accessory structures 17.50.250, home occupations 17.50.110, short-term rentals 17.50.296)
An accessory structure shall not occupy a required front or corner side setback.
- Sec. 17.50.250.F.2, Zoning Code Chapter 17.50 - Standards for Specific Land Uses (ADUs 17.50.275, accessory structures 17.50.250, home occupations 17.50.110, short-term rentals 17.50.296)
An accessory structure, other than mechanical equipment, a hot tub, or a swimming pool, shall maintain a minimum separation of six feet from any other structure (excluding walls and fences) on the site.
- Sec. 17.50.250.C, Zoning Code Chapter 17.50 - Standards for Specific Land Uses (ADUs 17.50.275, accessory structures 17.50.250, home occupations 17.50.110, short-term rentals 17.50.296)
An accessory structure shall not be constructed before the main structure.
- Sec. 17.40.180.B.2.c, Zoning Code Chapter 17.40 - General Property Development and Use Standards (17.40.160 setbacks/encroachments, 17.40.180 walls and fences)
Between the front property line and the occupancy frontage, the maximum wall or fence height shall be four feet. Walls and fences in the front setback shall be at least 50 percent open and any concrete block materials shall have a finished stucco appearance.
- Sec. 17.40.180.B.2.a, Zoning Code Chapter 17.40 - General Property Development and Use Standards (17.40.160 setbacks/encroachments, 17.40.180 walls and fences)
In interior side or rear setbacks abutting property in a OS or PS zoning district or abutting property with a residential use, the maximum wall or fence height shall be six feet.