Zone 0 in San Diego: Fire-Safe Backyard Rules This Fire Season

Q: How do I check Zone 0 rules for my existing San Diego home?

Check your address on CAL FIRE’s hazard severity map to see whether it falls within a State Responsibility Area or a Very High Fire Hazard Severity Zone. State rules adopted by the Board of Forestry on August 19, 2026, are still pending state review. The City of San Diego began applying Zone 0 guidelines to new structures in its very high fire severity zones on February 28, 2026.

Q: Can I keep live plants in Zone 0?

Keeping live plants in Zone 0 - the 5-foot ember-resistant area next to your home - is generally discouraged or restricted to limit materials that embers could ignite. Keep this space noncombustible. The state rules, adopted by the Board of Forestry on August 19, 2026, are pending state review. They prohibit bark mulch, wood chips, firewood, and dead vegetation in this area.

Start with the 5 feet beside your home: clear combustible mulch, firewood, and dead vegetation, then check which Zone 0 rules apply to your property. Your address and project type determine whether state requirements or San Diego’s local guidance govern the work.

As of October 8, 2026, the state regulations adopted on August 19 are pending state review. San Diego’s guidance says Zone 0 requirements began applying to new structures in the city’s Very High Fire Hazard Severity Zones on February 28, 2026.

Before you start your remodel, read the San Diego backyard remodeling planning guide and run through these Zone 0 checks:

Check your parcel on CAL FIRE’s Fire Hazard Severity Zone map and confirm requirements with your local department.
Review attached fences and gates, including the adopted state rule’s 5-foot noncombustible fence connection.
Plan noncombustible hardscape with drainage, utility access, and permits in mind, whether you choose paver installation, gravel, or concrete.

Confirm the rules before construction. Keep the strip clear before Santa Ana winds and after debris collects.

San Diego Zone 0: Your 5-Foot Fire-Safe Checklist

San Diego implementing Zone Zero for new builds | NBC 7 San Diego

Who the Rules Apply To: State Responsibility Areas and Very High Fire Hazard Severity Zones

Check whether your address falls under the state rule or the City’s local Zone 0 guidance.

The state rule applies in State Responsibility Areas (SRAs) and in Local Responsibility Areas (LRAs) mapped as Very High Fire Hazard Severity Zones. It does not apply to every home in San Diego County. Before choosing materials or starting work on the 5-foot strip, verify your parcel on CAL FIRE’s map.

Check Your Address on CAL FIRE’s Hazard Severity Map

Enter your property address in CAL FIRE’s Fire Hazard Severity Zone map viewer. Check whether your parcel is in an SRA or a mapped VHFHSZ and whether its rating is Moderate, High, or Very High. Save or print the parcel result rather than relying on a neighborhood name or mailing address.

The map result is a starting point, not the whole answer. Outside the mapped areas, don’t assume local rules are the same. San Diego projects may also need to follow local guidance.

Confirm City Rules for New Structures

The City of San Diego’s Zone 0 guidelines say the city began applying Zone 0 to new structures in its Very High Fire Hazard Severity Zones on February 28, 2026. Before finalizing plans or choosing fence, gate, or hardscape materials, confirm your project’s requirements with the fire, building, or planning department that governs your parcel.

Check the 5-Foot Perimeter, Mulch Beds, and Fences

Review the state Zone 0 regulations adopted by the California Board of Forestry on August 19, 2026, and pending state review. Confirm which rules govern your project before making changes. Once your parcel is confirmed, start at the wall line and work outward to 5 feet.

Map the Safety Zone and Low-Combustibility Zone

Start at wall bases, corners, and spaces beneath eaves. The adopted framework divides the area into two parts: an inner safety zone beside the structure and a low-combustibility zone extending out to 5 feet. Check the adopted text for the inner zone’s boundary.

Use a tape measure and chalk or flags to mark 5 feet outward from exterior walls or other applicable structure edges. Include narrow side yards, backyard transitions, and attached features. Photograph any boundary that needs professional confirmation.

Remove Bark Mulch, Wood Chips, Firewood, and Dead Vegetation

The adopted state version prohibits bark mulch, wood chips, firewood, and dead or dying vegetation within Zone 0. Check beds beneath windows, behind gates, and under stairs or decks.

Remove combustible mulch - don’t just cover it with another material. Move firewood outside the zone, away from structures and access paths. If you have an outdoor fire feature, review San Diego fire pit safety rules to ensure proper clearances. Clear dead leaves, branches, and other collected litter.

Check these areas again before Santa Ana winds and after leaf drop. Inspect roofs and gutters, too.

Check the 5-Foot Noncombustible Fence Connection

Check each fence that meets the house. Where a fence directly attaches to a building or structure, the adopted state rule requires a 5-foot noncombustible section at the connection.

Identify each attachment and measure 5 feet along the fence line from the structure. Record the materials used for boards, gates, posts, and framing. Then ask your contractor to check the hardware and attachments against the rule text.

City guidance separately addresses attached fences and gates, so verify the local requirement that applies. Do not apply this rule to detached fencing.

Plan Hardscape Along the House

Once you’ve cleared combustible materials, replace them with noncombustible surfaces that suit your yard and drain properly.

Compare Pavers, Gravel, and Concrete

Use noncombustible hardscape in the 5-foot zone to replace mulch and other surfaces that can burn.

Noncombustible Material	Upkeep	Drainage	Typical Use
Pavers	Sweep debris from joints.	Permeable systems let water soak through; other systems need grading.	Perimeter paths and patios
Gravel	Remove weeds and debris.	Lets water soak through, but drainage depends on the soil underneath.	Side yards and mulch replacement
Concrete	Check for cracks.	Needs a slope to direct runoff.	Paths and utility pads

Compare installed costs, not just material prices. Include excavation, base preparation, edging, and drainage. Let soil conditions guide the base and drainage design.

Before settling on a layout, check grading, access, and permit requirements.

Check Drainage, Access, and Permits

Review these items before construction starts. Check the San Diego backyard remodel permit guide for approval requirements.

[ ] Mark proposed perimeter hardscape, drainage, and utility locations. Keep vents, meters, and cleanouts accessible.
[ ] Confirm that grading sends water away from the house, and identify where it will discharge.
[ ] Verify permit requirements for hardscape, grading, drainage, and utility work before construction begins.

Include Zone 0 in Your Backyard Remodel

Plan hardscape with room for maintenance and inspections. Add drainage and utility locations to your backyard remodeling plan.

Position paths, pads, and drainage so they don’t block access to the house.

Conclusion: Your Checklist Before Santa Ana Winds

Before making changes, check your parcel on CAL FIRE’s map and confirm which local rules apply.

Inspect the wall line, the under-eave area, and the full 5-foot strip. Remove bark mulch, wood chips, firewood, and dead vegetation. Where a fence meets the house, check the 5-foot noncombustible fence connection.

Keep patio cushions, firewood, and other combustible items outside Zone 0. Once the strip is clear, maintain it with routine cleanup after wind events. Sweep up leaves and keep drainage and access paths clear.

Replacing mulch with noncombustible surfaces works best when you settle the grade first. Where the strip needs regrading, plan drainage and grading services before the new surface goes down. United Turf & Pavers builds perimeter hardscape as part of its backyard remodeling services, planning paver installation, drainage, and access together. Confirm required approvals with your local authority.

FAQs

How do I check Zone 0 rules for my existing San Diego home?

Check your address on CAL FIRE’s hazard severity map to see whether it falls within a State Responsibility Area or a Very High Fire Hazard Severity Zone. State rules adopted by the Board of Forestry on August 19, 2026, are still pending state review.

The City of San Diego began applying Zone 0 guidelines to new structures in its very high fire severity zones on February 28, 2026.

Can I keep live plants in Zone 0?

Keeping live plants in Zone 0 - the 5-foot ember-resistant area next to your home - is generally discouraged or restricted to limit materials that embers could ignite. Keep this space noncombustible.

The state rules, adopted by the Board of Forestry on August 19, 2026, are pending state review. They prohibit bark mulch, wood chips, firewood, and dead vegetation in this area.

How do I measure Zone 0 in a narrow side yard?

Start at the house’s exterior walls and the underside or edge of any eaves. The safety zone follows these surfaces, while the low-combustibility zone extends outward up to 5 feet. Along the side yard, use a measuring tape to measure straight out from each exterior wall.

If a fence or gate meets the house, measure the 5-foot noncombustible, ember-resistant section from that connection.