Zone 0 Fence and Gate Planning in San Diego
Yes — Zone 0 applies to both fences and gates. Here is exactly how, under the California draft state rule and San Diego's adopted municipal code.
As of July 2026: combustible fences and gates may not be attached to a structure, must have a 5-foot non-combustible span where they attach or come within 1 foot of a structure, and no new combustible fence or gate may go within 5 feet of a structure after the effective date. Existing combustible fences may be repaired with combustible materials. Requirements vary by parcel and review by your authority having jurisdiction (AHJ — your local fire authority or building department); the tables below cite the specific rule for each situation.
Site assessment by appointmentUnderstanding the Regulation
What is Zone 0?
Zone 0 is the 0–5 ft ember-resistant zone immediately around a structure (CAL FIRE). The goal is to keep anything that can catch an ember — including combustible fencing tied to the home — out of those first five feet. The rule traces to AB 3074 (2020), which amended PRC §4291 and directed the Board of Forestry (BOF) to write implementing regulations.
The 5-Foot Non-Combustible Span
Where a fence or gate attaches to — or comes within 1 foot of — a structure, the draft state rule (§1298.04(b)(9)) requires a 5-foot non-combustible span at that point. San Diego's §512.0604 §4.6 calls this the transitional span.
San Diego Is Already Adopted
The statewide BOF rule is still a draft (updated April 17, 2026). The City of San Diego adopted Zone 0 ahead of the state via SDMC §512.0604 — effective Feb 28, 2026 for new structures and Feb 28, 2027 for existing structures.
Where It Applies
Zone 0 rules apply to structures in a Very High Fire Hazard Severity Zone. Many San Diego coastal, hillside, and canyon-adjacent parcels fall in High or Very High zones. Confirm your parcel's designation on the CAL FIRE FHSZ maps and with your AHJ.
The 0–5 ft Rule, Drawn
Where a Fence Meets the House
A side view of the first five feet. A combustible fence attached to the wall is not permitted for new work; the compliant detail is a 5-foot non-combustible span where the fence meets — or comes within 1 foot of — the structure.
Address / FHSZ lookup 01
Check your address
See whether an address point intersects CAL FIRE's current public Fire Hazard Severity Zone layers before you plan a fence-to-structure transition.
- Layer A
- LRA recommendations · all 2025 phases
- Layer B
- SRA zones · effective April 1, 2024
- Scope
- Point guidance, not parcel or code determination
Awaiting map point
Ready for an address
Choose an address match or press Enter. The checker tests both the current LRA and SRA public layers and reports only what the mapped point returns.
Unofficial convenience lookup based on public CAL FIRE map services — confirm with your AHJ; not a compliance determination.
Visual Guide
Defensible Space Zones
Zone 0 — Ember Resistant
0–5 feet from the structure. The strictest zone: no combustible fence or gate attached to the home, a 5-ft non-combustible span at attachment points, and no new combustible fence within 5 ft after the effective date.
⚠ Strictest RequirementsZone 1 — Lean, Clean, Green
5-30 feet from structure. Reduce fuel load, maintain spacing between plants and structures. Fire-resistant materials recommended.
Moderate RequirementsZone 2 — Reduced Fuel
30-100 feet from structure. Create horizontal and vertical spacing. Keep grass low, remove dead vegetation.
Standard MaintenanceMaterials that often require closer review near structures.
Combustible fencing materials draw the most scrutiny within 5 feet of a structure. The tables below show which materials are allowed, conditional, or not permitted for new installs under San Diego rules — always confirm the final call with your AHJ.
- Wood fencing
- Vinyl/PVC fencing
- Composite wood-plastic fencing
- Bamboo screening
Does Zone 0 Apply to Fences and Gates?
Yes — Both Fences and Gates
Zone 0 applies to fences and gates, not just vegetation. The rule depends on how the fence meets the structure and whether it is new or existing. As of July 2026, the statewide rule is a Board of Forestry draft; San Diego's SDMC §512.0604 is adopted.
| Situation | Rule | New / Existing | Authority |
|---|---|---|---|
| Combustible fence/gate attached to a structure | Not permitted | Both | BOF draft §1298.04(b)(8) |
| Fence/gate attached to, or within 1 ft of, a structure | 5-ft non-combustible span required at attachment/contact point | Both | BOF draft §1298.04(b)(9) |
| New combustible fence/gate within 5 ft of a structure | Not permitted after the effective date | New | BOF draft §1298.04(b)(9) |
| Existing combustible fence needing repair | Repair with combustible replacement materials allowed | Existing | BOF draft §1298.04(b)(9) |
| Parallel combustible fence in Zone 0 forming a continuous fuel path | Not permitted | Both | SDMC §512.0604 §4.6 |
| Existing vinyl/wood, parallel, ≥4 ft from wall, no vegetation between fence and wall | Conditional exception | Existing | SDMC §512.0604 §4.6 Exc. 1 |
The state rule is a draft and section numbers may change before adoption; San Diego's SDMC §512.0604 is adopted and administered by San Diego Fire-Rescue. Final acceptance depends on your parcel and AHJ review.
Two Different Rules
Can I Have a Wood Fence Within 5 Feet of My House?
Search results often conflate two separate rules. It helps to keep them apart:
| Question | Ordinary setback / zoning law | Zone 0 fire law (VHFHSZ) |
|---|---|---|
| What does it govern? | Fence height and placement on your lot, everywhere | Combustible materials within 0–5 ft of a structure, in a Very High Fire Hazard Severity Zone |
| Does a wood fence break it? | Not by material — only if it exceeds height/placement limits | A new combustible (wood) fence within 5 ft, or one attached to the structure, is not permitted |
| What about my existing wood fence? | Generally unaffected if it already complies | May be repaired with combustible materials; San Diego allows a narrow exception for existing parallel fencing ≥4 ft from the wall |
| Where to check | San Diego code SEC. 92.1.712A | BOF draft §1298.04(b)(9); SDMC §512.0604 §4.6 |
Bottom line: the fire rule does not ban every wood fence within 5 feet. It bars new combustible fences/gates within 5 ft and any combustible fence attached to the structure, requires a 5-ft non-combustible span at attachment points, and still allows repair of existing combustible fences.
Regulation Timeline
Key Public Milestones
The dated path from statute to San Diego adoption. The statewide rule is still a draft; San Diego's dates are adopted. Confirm current enforcement with your AHJ before relying on a date.
Review the current rules with your AHJ before scheduling a project.
Request a Zone 0 ReviewZone 0 Considerations
Fencing Materials to Review
We help evaluate noncombustible and lower-fuel fence, gate, and wall options that may make sense near structures. Test standards and documented material data are collected in our technical data. Final material acceptance should be verified with your local AHJ.
| Material | Combustibility (test standard) | Zone 0 status (San Diego) | Notes |
|---|---|---|---|
| Aluminum (6063-T6) | Non-combustible (ASTM E136) | Allowed | Fire performance still depends on the specific product and test reports. |
| Steel | Non-combustible (ASTM E136) | Allowed | Galvanized/powder-coat assemblies; specify per product documentation. |
| Gabion / masonry (CMU) block | Non-combustible (ASTM E136) | Allowed | Confirm project-specific acceptance with your AHJ. |
| Vinyl (existing) | Combustible | Conditional | SDMC §512.0604 §4.6 Exc. 1: parallel, ≥4 ft from wall, no vegetation between fence and wall. Your insurer or IBHS may not allow vinyl within 5 ft. |
| FRTW (new parallel wood) | Conditional (per OSFM WUI Products Handbook listing) | Conditional | SDMC §512.0604 §4.6 Exc. 2: must be Fire Retardant Treated Wood on the OSFM WUI Products Handbook, approved for exterior use. Insurer may not allow. |
| Composite / WPC | Per product test report (ASTM E84 class) | Depends on product | Combustible unless documented; verify the specific product's test report. Confirm with AHJ. |
| Untreated wood (attached, or new within 5 ft) | Combustible | Not allowed for new installs | BOF draft §1298.04(b)(9): existing may be repaired with combustible materials. |
Documentation for Insurance Conversations
California homeowners are increasingly being asked about fire-conscious exterior improvements during policy renewals and inspections. We can provide project documentation that the homeowner can share with their insurer where applicable. No coverage outcome is guaranteed.
- Project documentation provided for the homeowner's records
- Insurance impacts vary by carrier, policy, property, and underwriting review
- Photos, written scope, and material details on request
- Confirm specific documentation requirements with your insurer
- Final decisions remain with the carrier and the homeowner
San Diego Neighborhood Notes
Zone 0 considerations by San Diego neighborhood
Zone 0 planning looks different in coastal La Jolla than in canyon-adjacent Rancho Santa Fe. Below are the planning conversations that come up most often in each of our primary San Diego neighborhoods. Each location page covers material recommendations, submarket variations, and on-site considerations in more detail.
Rancho Santa Fe
Canyon-edge estates with significant defensible-space depth. Common conversations: estate-perimeter Zone 0 material strategy, vehicle gates with noncombustible build, plant-line transitions into Zone 1.
La Jolla
Coastal salt exposure with hillside fire-risk overlap (Mount Soledad, Bird Rock). Common conversations: noncombustible aluminum or steel with marine-grade finishes, pool-code intersections, view-preserving designs.
Del Mar
Coastal bluffs with HOA design review and view easements. Common conversations: low-profile noncombustible fencing, HOA-approvable material palettes, transitions into landscape-screened Zone 1.
Coronado
Lower fire-zone severity overall, but coastal salt and historic-district aesthetics drive material choice. Common conversations: noncombustible perimeter strategies that respect historic-district guidelines and salt exposure.
Carmel Valley
Canyon-adjacent inland with significant Zone 0 review pressure. Common conversations: canyon-edge noncombustible fencing, pool-barrier code overlap, side-yard combustible-fence replacement plans.
Poway
Inland canyon and brush exposure with active fire-prevention focus. Common conversations: estate-perimeter noncombustible runs, defensible-space transitions, segmented combustible-fence replacement strategies.
Carlsbad
Coastal-to-ranch gradient: La Costa, Aviara, Olde Carlsbad, Bressi Ranch. Common conversations: coastal salt-air on the west, canyon-adjacent fire planning inland, mixed-material perimeter strategies.
Encinitas
Leucadia, Cardiff, Old Encinitas, Olivenhain. Common conversations: coastal-to-rural transitions, Olivenhain canyon Zone 0 planning, view and HOA design considerations along the coast.
Common Questions
Zone 0 FAQ
Does Zone 0 apply to fences and gates?
Yes — Zone 0 applies to both fences and gates. Under the California draft state rule and San Diego's adopted SDMC §512.0604, combustible fences and gates may not be attached to a structure, must have a 5-foot non-combustible span where they attach or come within 1 foot of a structure, and no new combustible fence or gate is permitted within 5 feet of a structure after the effective date. Existing combustible fences may be repaired with combustible materials.
Can I keep my existing wood fence?
In most cases, yes. The Zone 0 fire rule does not ban every wood fence within 5 feet. It bars new combustible fences and gates within 5 feet after the effective date and any combustible fence attached to the structure, and it requires a 5-foot non-combustible span at attachment points. An existing combustible fence may be repaired with combustible materials, and San Diego (SDMC §512.0604 §4.6) allows a narrow exception for existing parallel fencing that sits at least 4 feet from the wall with no vegetation between the fence and the structure. Your parcel and AHJ review determine the final call.
When does Zone 0 take effect in San Diego?
The City of San Diego adopted Zone 0 through SDMC §512.0604 ahead of the state. It took effect February 28, 2026 for new structures and applies to existing structures beginning February 28, 2027, subject to change at the discretion of the Fire Code Official. The statewide Board of Forestry rule remains a draft as of July 2026 (updated April 17, 2026), so San Diego's municipal dates are the operative ones for City parcels.
What is Zone 0 in California fire regulations?
CAL FIRE guidance describes Zone 0 as the 0-5 foot ember-resistant area immediately around a structure (source). The intent is to remove or harden anything within those first five feet that could catch an ember and carry fire to the building, including combustible fencing connected to the home. Specific requirements vary by jurisdiction and are still being finalized for many areas; always confirm with the local AHJ.
When do local defensible space requirements take effect?
AB 3074 set the framework for Zone 0 statewide, but specific implementation, enforcement timing, and inspection processes are being phased in at the local level. As of 2026, San Diego County jurisdictions are at varying stages of formal adoption. Check current rules with your city or county fire prevention office for the most accurate timeline for your address.
What fencing materials are commonly considered for defensible space?
Within Zone 0 (0-5 ft from structure), noncombustible materials like aluminum, steel, masonry block, and gabion are commonly considered. Within Zone 1 (5-30 ft), the conversation broadens to include composite (with documentation), low-volume vegetation strategies, and segmented combustible fencing with noncombustible breaks. Wood fencing connected directly to a structure is the highest-risk scenario most homeowners are advised to address first.
How do I know if my property is in a fire hazard zone?
CAL FIRE publishes Fire Hazard Severity Zone (FHSZ) maps showing Moderate, High, and Very High zones for State Responsibility Area and Local Responsibility Area lands. Search your address on the official CAL FIRE FHSZ viewer. Many San Diego coastal, hillside, and canyon-adjacent properties fall in High or Very High zones. We can also help interpret a parcel's classification during a site visit.
Can fire-hardening measures affect insurance?
Carriers increasingly factor home-hardening measures into underwriting and renewal decisions in California fire-risk zones. Documenting noncombustible fencing within Zone 0, product spec sheets, and photos of completed work can support insurance conversations. Specific impacts on premium, eligibility, or renewal vary by carrier and policy and should be confirmed directly with your insurance agent. See Insurance & Wildfire for more.
Official Resources
Plan a Fire-Conscious Perimeter
Tell us about the structure and the first five feet around it — where combustible fencing meets the building, gate locations, and any Zone 0-sensitive transitions. We’ll review noncombustible material options for your San Diego property. Final requirements depend on your parcel, jurisdiction, and AHJ review.
Plan a Fire-Conscious Perimeter
Site assessment by appointment. We help evaluate Zone 0-sensitive areas, combustible fence transitions, gates, and noncombustible material options for your San Diego property. Timing depends on project scope, location, and site conditions.
Request an EstimatePrefer the full estimator? Open the estimate builder.