San Diego's Zone 0 Fence Rules: SDMC §512.0604, Explained

The City of San Diego adopted its own Zone 0 ordinance ahead of the state: San Diego Municipal Code §512.0604, added January 29, 2026 by Ordinance O-22042 and effective February 28, 2026. New construction is already live. Existing structures begin February 28, 2027 — Year 1 is maintenance. Fences are Year 3: February 28, 2029. San Diego has no single citywide fire-hazard tier; designations vary parcel by parcel.

The ordinance: SDMC §512.0604

San Diego Municipal Code §512.0604, "Maintenance of Defensible Space" (also called the SDWUI Code), was added January 29, 2026 by Ordinance O-22042 N.S., effective February 28, 2026. Codified text: https://docs.sandiego.gov/municode/MuniCodeChapter05/Ch05Art12Division06.pdf

Zone 0 requirements (subsection (e))

  • •Bans ember-ignitable landscape materials and combustible items within 5 feet of a structure.
  • •New structures comply from the effective date (February 28, 2026).
  • •Existing structures enter the program February 28, 2027 (Year 1, maintenance). Full compliance, including fences and gates, is Year 3 — February 28, 2029.
  • •Compliance plans are allowed under the code.
Existing-structure applicability is "subject to change at the discretion of the Fire Code Official." Source: City of San Diego guidance on §512.0604.

Fence exception: attribution matters

Read this carefully: the code text of §512.0604 itself contains no fence-specific language at all. The existing-vinyl-fence exception comes only from the San Diego Fire-Rescue Department's "Zone 0 Guidelines for Existing Structures" (Rev. 4/22/2026), which is guidance interpreting the code; not the code itself.

The City's guidelines interpret the code to allow existing vinyl fencing without combustible reinforcement to remain within 5 feet only if all five conditions hold. Source: https://www.sandiego.gov/sites/default/files/2026-04/zone-0-guidelines-for-existing-structures.pdf

The five conditions:

  1. Parallel to the structure wall.
  2. No less than 4 feet from the structure.
  3. No unreasonable fire risk from condition, height, or fuel accumulation.
  4. Maintained free of debris.
  5. No vegetation between the fence and the structure.

Fire-hazard designations in San Diego

San Diego has no single citywide fire-hazard tier; designation varies by parcel (vegetation density, slope, and other factors). The City adopted its updated 2025 LRA map under Ordinance O-21992, effective August 30, 2025, and that city map may only add to or increase the state's baseline recommendation, not reduce it.

City of San Diego parcel-level lookup (49-panel grid map): https://www.sandiego.gov/fire/community-risk-reduction/fire-hazard-severity-zones

Verify your parcel: fire-hazard designations vary within San Diego; verify your specific parcel on the official CAL FIRE FHSZ Viewer: https://osfm.fire.ca.gov/what-we-do/community-wildfire-preparedness-and-mitigation/fire-hazard-severity-zones

What this means for a fence owner

If an existing combustible fence sits within 5 feet of a structure on a covered property, the city’s guidelines ask for full compliance — “This includes replacing fences and gates that do not comply” — by February 28, 2029. February 28, 2027 is Year 1 maintenance (dead vegetation, debris, firewood), not the fence date. The vinyl exception above is a guidance-level carve-out, not in the ordinance itself.

For the statewide picture and where San Diego's ordinance sits relative to the statewide rule whose final draft is approved pending OAL, see our statewide Zone 0 explainer.

Ordinance and FHSZ information on this page reflects our understanding as of August 20, 2026; the regulation and City guidance may change. Verify current requirements with the City of San Diego or CAL FIRE.