Skip to content

San Diego County · Building on your lot

Swimming pools in San Diego County

A new pool at a single-family home or duplex needs a permit, a permanent enclosure from neighbors and one more listed safety feature.

Key points

  • New pools: A new pool at a single-family home or duplex needs a permit, a permanent enclosure from neighbors and one more listed safety feature.

Each rule below links to the section of the San Diego County Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What San Diego County's code says

San Diego County code What San Diego County's code adds
Pool barrier
  • A non-climbable fence or other structure with no horizontal openings over 5 inches.
    Applies: Pools on lots under 1 net acre, built or enlarged between July 29, 1977, and April 17, 1996.
    § 3109.5 · code text
    A non-climbable fence or other structure having a minimum height of five feet measured from the exterior grade with no horizontal openings greater than five inches.
  • No enclosure from neighbors is needed if the pool edge is at least 100 feet from the nearest property line.
    Applies: Lots of 3 acres or more net area.
    § 3109.3 · code text
    the minimum distance from the closest edge of the pool, measured directly to the nearest property line, is at least 100 feet.
Barrier height
  • At least 5 feet, measured from the outside grade.
    Applies: Pools on lots under 1 net acre, built or enlarged between July 29, 1977, and April 17, 1996.
    § 3109.5 · code text
    A non-climbable fence or other structure having a minimum height of five feet measured from the exterior grade with no horizontal openings greater than five inches.
Equipment and alarms
  • Doors with direct pool access need a self-closing, self-latching device, with the release at least 54 inches above the floor.
    Applies: One safety-feature option for a new pool at a single-family home or duplex.
    § 3109.3 · code text
    All doors providing direct access from the home to the swimming pool shall be equipped with a self-closing, self-latching device with a release mechanism placed no lower than 54 inches above the floor.
  • An electric safety cover meeting ASTM F 1346, with 1 switch at least 54 inches above the ground.
    Applies: One safety-feature option for a new pool at a single-family home or duplex.
    § 3109.3 · code text
    Sec. 3109.3 Swimming pool construction permit; safety features required. Commencing January 1, 1998, whenever a construction permit is issued for construction of a new swimming pool at a private, single-family home or duplex, the swimming pool shall be separated from neighboring properties by a permanent enclosure that meets the requirements of section 3109.4. Additionally the pool shall be equipped with the safety features required by section 3109.2, with at least one of the safety features also complying with one of the following: 1. The pool shall be isolated from access to a home and other habitable buildings on the lot by an enclosure that meets the requirements of section 3109.4. 2. The pool shall be equipped with an electrically operated approved safety pool cover meeting ASTM F 1346 that can be opened or closed with a single switch. The switch shall be placed at least 54 inches above the ground. 3. The residence shall be equipped with an exit alarm on each door providing direct access to the pool. The alarm shall sound continuously for a minimum of 30 seconds, within seven seconds after the door and its screen, if present, are opened, and be capable of providing a sound pressure level of not less than 85 B when measured indoors at a distance of 10 feet from the alarm. The alarm shall automatically reset under all conditions. The alarm system shall be equipped with a manual means, such as a touchpad or switch, placed no lower than 54 inches above the floor, to temporarily deactivate the alarm for a single opening, but the alarm shall not be equipped with an on/off switch. The deactivation shall be for no more than 15 seconds. 4. All doors providing direct access from the home to the swimming pool shall be equipped with a self-closing, self-latching device with a release mechanism placed no lower than 54 inches above the floor. The home shall also have a minimum of one exit door that does not provide direct access to the swimming pool and that complies with exit door regulations of the County Building Code. 5. Other means of protection, if the degree of protection afforded is equal to or greater than that afforded by any of the devices set forth in Items 1-4 above, as determined by the building official. Any ordinance governing child access to pools adopted by the County on or before January 1, 1997, is presumed to afford protection that is equal to or greater than that afforded by any of the safety features listed in Items 1-4. Exception: On a lot or parcel having a net area of three acres or greater, a swimming pool enclosure that separates the pool from neighboring properties is not required when the minimum distance from the closest edge of the pool, measured directly to the nearest property line, is at least 100 feet. Exception: The enclosure and safety feature requirements of this chapter do not apply to a self-contained hot tub or spa equipped with a locking safety cover listed to ASTM F 1346. (Added by Ord. No. 10146 (N.S.), effective 5-13-11; repealed and reenacted by Ord. No. 10464 (N.S.), effective 4-14-17; repealed and adopted by Ord. No. 10651 (N.S.), effective 2-28-20; repealed and adopted by Ord. No. 10829 (N.S.), effective 3-10-23; repealed and adopted by Ord. No. 10982 (N.S.), effective 4-3-26)
  • Exit alarm on each door with direct pool access; it sounds at least 30 seconds within 7 seconds of opening.
    Applies: New home pool option: at least 85 B indoors at 10 feet; resets automatically; shutoff at least 54 inches high, at most 15 seconds.
    § 3109.3 · code text
    3. The residence shall be equipped with an exit alarm on each door providing direct access to the pool. The alarm shall sound continuously for a minimum of 30 seconds, within seven seconds after the door and its screen, if present, are opened, and be capable of providing a sound pressure level of not less than 85 B when measured indoors at a distance of 10 feet from the alarm. The alarm shall automatically reset under all conditions. The alarm system shall be equipped with a manual means, such as a touchpad or switch, placed no lower than 54 inches above the floor, to temporarily deactivate the alarm for a single opening, but the alarm shall not be equipped with an on/off switch. The deactivation shall be for no more than 15 seconds.
Gates
  • Gates must be self-closing and self-latching, with latches at least 4 feet 6 inches above grade.
    Applies: Pools on lots under 1 net acre, built or enlarged between July 29, 1977, and April 17, 1996.
    § 3109.5 · code text
    All gates must be self-closing and self-latching, with latches placed at least four feet six inches above the grade
Maintenance and empty pools
  • The owner must maintain the safety features required by the code in effect when the pool was built.
    Applies: Pools built or enlarged on or after July 29, 1977.
    § 3109.5 · code text
    When a swimming pool was constructed or enlarged on or after July 29, 1977, the property owner shall maintain the safety features required by the code in effect at the time of construction.
  • Barriers and safety features must be installed to meet this chapter's pool safety rules.
    Applies: Existing pools that are remodeled, enlarged or modified.
    § 3109.5 · code text
    When an existing swimming pool is remodeled, enlarged, or modified it must have barriers and safety features installed in compliance with this chapter.
Permit
  • A construction permit; the new pool needs a permanent enclosure from neighbors plus 1 more listed safety feature.
    Applies: New pools at private single-family homes or duplexes, from January 1, 1998.
    § 3109.3 · code text
    whenever a construction permit is issued for construction of a new swimming pool at a private, single-family home or duplex

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

What are the pool fence and setback rules in San Diego County?

A new pool at a single-family home or duplex needs a permit, a permanent enclosure from neighbors and one more listed safety feature.

General information, not legal advice.

Ask about a specific San Diego County property

Ask GoCodebook how San Diego County's swimming pools rules apply to your situation and get an answer that cites the section.

Ask your question

More on building on your lot in San Diego County