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. It applies Zone 0 requirements, the 5 feet nearest a structure, to new structures now, and to existing structures beginning approximately February 28, 2027. 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 comply one year after (~February 28, 2027).
  • •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 compliance clock for existing structures starts approximately February 28, 2027; with the guidance-level vinyl exception above as the one documented carve-out currently in place.

For the statewide picture and where San Diego's ordinance sits relative to the still-draft state rule, see our statewide Zone 0 explainer.

Ordinance and FHSZ information on this page reflects our understanding as of July 26, 2026; the regulation and City guidance may change. Verify current requirements with the City of San Diego or CAL FIRE.