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SetbackIQ

Setback requirements in San Diego, CA

We haven't verified San Diego's accessory-structure setback tables yet.

Rules last checked by a person on October 19, 2026. Guidance only; confirm with San Diego before you build.

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Citywide placement rules

ADU: Side setback (max a city can require)4 ftNo setback at all for an ADU inside an existing structure or rebuilt in the same footprint.
ADU: Rear setback (max a city can require)4 ft
Fence: Front yard setback6 ft max

Sources

  1. City of San Diego DSD, When Is a Permit Required? (Feb 2025). Checked 2026-10-19.
    Storage sheds or playhouses over 120 sq. ft. in projected roof area require a permit... Fences up to seven feet tall do not require a permit. However, fences over six feet are prohibited in the front yard setback, and fences over three feet are prohibited i…
  2. 44 CFR 59.1, definition of development (NFIP). Checked 2026-10-19.
    Development means any man-made change to improved or unimproved real estate, including but not limited to buildings or other structures...
  3. 44 CFR 60.3, floodplain management criteria. Checked 2026-10-19.
    Require permits for all proposed construction or other development in the community...
  4. 2024 IRC R105.2, Work exempt from permit (text published by the City of Benson, AZ). Checked 2026-10-19.
    One-story detached accessory structures, provided that the floor area does not exceed 200 square feet. Fences not over 7 feet high. Decks not exceeding 200 square feet in area, that are not more than 30 inches above grade at any point, are not attached to a…
  5. San Diego Municipal Code Ch. 12, Art. 9, Div. 2 (Sec. 129.0203, exempt structures). Checked 2026-10-20.
    Decks... that do not exceed 200 square feet... not more than 30 inches... above grade at any point, that are not attached to a dwelling, and that do not serve the exit door.
  6. HCD Accessory Dwelling Unit Handbook (March 2026). Checked 2026-10-19.
    A setback of no more than four feet from the side and rear lot lines shall be required for an attached or detached ADU (Gov. Code, 66314(d)(7)).