Simi Valley sits in a region with meaningful wildfire exposure, especially in the hillside tracts on the north, south, and east edges of the city. CAL FIRE publishes Fire Hazard Severity Zone maps at fhsz.fire.ca.gov; portions of Simi Valley fall into Moderate, High, and Very High zones. This page covers how the zones are defined, which tracts sit in elevated zones, what defensible-space rules apply, how the California FAIR Plan works when standard carriers decline, and what specific questions a buyer should ask in a Brush Zone transaction.
How CAL FIRE classifies fire-hazard zones
CAL FIRE publishes Fire Hazard Severity Zones (FHSZ) in three tiers: Moderate, High, and Very High. The maps are based on fuel, terrain, weather, and crown fire potential. The most current maps are at fhsz.fire.ca.gov. In State Responsibility Areas (SRA), CAL FIRE has primary jurisdiction; in Local Responsibility Areas (LRA), local fire agencies set rules and CAL FIRE publishes recommended designations.
Simi Valley sits primarily in a Local Responsibility Area served by Ventura County Fire. The recently updated CAL FIRE LRA maps designated additional areas of Simi Valley as elevated fire-hazard zones. Always confirm the current zone for a specific parcel on the official map rather than relying on a third-party score.
Which Simi Valley tracts sit in elevated zones
Bridle Path, on the north side of the city, sits along the foothills with open-space fuel adjacent to many lots. Multiple Bridle Path streets are in elevated FHSZ designations. The hillside portions of Big Sky on the eastern edge of the city sit against the open space leading toward Las Llajas Canyon and are in elevated zones. Santa Susana Knolls, on the south side of the 118 freeway, sits against the Santa Susana Mountains with significant fuel exposure.
Portions of Wood Ranch that back against the open space toward Bard Reservoir are in elevated zones. Some north-side streets in Indian Hills and the Strathearn area also touch elevated zones. The central flat tracts are generally in lower zones because of fuel separation and street grid.
| Area | Typical FHSZ designation | Why |
|---|---|---|
| Bridle Path | High to Very High | Foothill fuel adjacency |
| Big Sky (hillside) | High to Very High | Backs to open-space fuel |
| Santa Susana Knolls | High to Very High | Adjacent to mountain fuel |
| Wood Ranch (perimeter) | Moderate to High | Backs to Bard Reservoir open space |
| Central Simi | Moderate or lower | Flat tracts, street separation |
| Tamarack (interior) | Moderate or lower | Interior tracts, less fuel adjacency |
Defensible space — the 0-5-100 framework
California's defensible-space rules around homes in elevated fire areas use three zones: Zone 0 (0 to 5 feet around the structure), Zone 1 (5 to 30 feet), and Zone 2 (30 to 100 feet). Zone 0 — ember-resistant zone — should be free of combustible materials, including bark mulch, wood fencing within 5 feet, and wood furniture stored against the wall.
Zone 1 emphasizes well-spaced, well-maintained landscaping with no ladder fuels (where ground vegetation can carry fire into the tree canopy). Zone 2 emphasizes thinning and horizontal/vertical spacing between trees and shrubs. Specific rules and enforcement timing are evolving; check current CAL FIRE guidance and any local Ventura County Fire requirements.
- Zone 0 (0-5 ft) — ember-resistant, no combustibles
- Zone 1 (5-30 ft) — spaced landscaping, no ladder fuels
- Zone 2 (30-100 ft) — thinning and spacing
- Clear roof and gutters of dead leaves
- Ember-resistant attic vents
- Class A roof assembly
Insurance reality in Brush Zones
Standard homeowners insurance for homes in elevated Fire Hazard Severity Zones has become harder to obtain in California. Some standard carriers decline to write new policies in High and Very High zones. Buyers in Brush Zone tracts should get an insurance quote before removing the loan and appraisal contingencies, not after.
The California FAIR Plan is the insurer of last resort for fire coverage when standard carriers decline. FAIR Plan coverage is dwelling-fire only (no comprehensive perils) and typically needs to be paired with a difference-in-conditions (DIC) policy to replicate what a standard HO-3 policy covers. Premiums and coverage limits have changed under recent regulation. AB-2756 and related rule changes have affected FAIR Plan capacity and surcharge structures. Talk to an independent broker who writes both standard and FAIR Plan policies before committing.
Questions to ask in any Brush Zone offer
Standard contingency periods may not be enough time to secure a non-FAIR Plan insurance quote in some Brush Zone transactions. Buyers should consider extending the loan contingency long enough to verify insurance availability and to compare quotes from multiple carriers.
Ask the seller for any defensible-space compliance documentation, copies of recent insurance declarations, evidence of any past wildfire damage and repairs, whether the roof is a Class A assembly, and whether the attic vents are ember-resistant. Permit history matters for any structural change, especially additions.
- Get an insurance quote before removing contingencies
- Ask for defensible-space compliance documentation
- Confirm roof class and vent type
- Review past insurance declarations
- Ask about past fire damage and repairs
- Verify permit history on additions
Home hardening — what actually helps
Hardening a home against ember intrusion and radiant heat is the highest-leverage set of improvements in a Brush Zone tract. The most effective items: Class A roof, ember-resistant attic and foundation vents, dual-pane tempered windows, non-combustible siding within 5 feet of grade, and metal gutter covers. These are the items insurers actively look at.
Inside a Brush Zone, the highest fire losses historically come from ember intrusion (through vents, gaps, or open windows) rather than direct flame front. Targeting embers — vents, gutters, eaves, and Zone 0 vegetation — is the highest-yield investment.
Evacuation routes and red flag warnings
Simi Valley's main evacuation corridors are the 118 freeway east-west, Madera Road, Tapo Canyon Road, and Sycamore Drive. In a wind-driven fire scenario, traffic on these corridors backs up quickly. Hillside tracts often have limited exit routes; Bridle Path and Santa Susana Knolls have specific concerns about how many homes share each exit point.
Sign up for VC Alert, the Ventura County emergency notification system. Pay attention to Red Flag Warning days. During a Red Flag, plan to leave early rather than late if you live in an elevated zone.
Past fire events and what they showed
The 2018 Hill Fire and Woolsey Fire burned to the south and east of Simi Valley. The Easy Fire in 2019 burned across the hills directly above the city, including the area near the Reagan Library, and required evacuation of multiple Simi neighborhoods. Each of those events produced lessons about evacuation timing, ember exposure, and the effectiveness of hardened homes.
Homes built with hardened features and maintained defensible space have consistently survived events that destroyed neighboring homes without those features. The investment pays off in both insurance availability and in actual outcome.
Where to verify the data yourself
CAL FIRE Fire Hazard Severity Zones at fhsz.fire.ca.gov is the primary source. Ventura County Fire Department publishes local defensible-space guidance. The California Department of Insurance publishes carrier availability data and FAIR Plan information. The natural-hazard disclosure provided during escrow will note whether the parcel is in any state-mapped fire hazard zone.
Talk to an independent insurance broker early. The cheapest insurance surprise to fix is the one you find out about during the offer process, not after.
Frequently Asked Questions
Are all Simi Valley homes in a fire hazard zone?
No. Central flat tracts are generally in lower zones. Hillside tracts on the perimeter — Bridle Path, Big Sky hillside, Santa Susana Knolls, and Wood Ranch perimeter — sit in elevated zones.
How do I check the fire hazard zone for a specific home?
Pull the address on the CAL FIRE Fire Hazard Severity Zone map at fhsz.fire.ca.gov. The natural-hazard disclosure during escrow will also note the designation.
Will I be able to get insurance?
It depends on the zone, the carrier, and the home's hardening. Get a quote before removing contingencies. FAIR Plan paired with a DIC policy is the fallback when standard carriers decline.
What is the FAIR Plan?
The California FAIR Plan is the state's insurer of last resort for fire coverage. It is dwelling-fire only and typically needs to be paired with a difference-in-conditions policy.
What is defensible space?
The cleared and managed area around a structure in a fire-prone zone, divided into Zone 0 (0-5 ft), Zone 1 (5-30 ft), and Zone 2 (30-100 ft). Each zone has specific vegetation and combustible-material rules.
What hardening features matter most?
Class A roof, ember-resistant vents, dual-pane tempered windows, non-combustible siding within 5 feet of grade, and metal gutter covers. Ember intrusion is the primary cause of home loss in wildland-urban interface fires.
Do past fires affect future insurance?
Yes, indirectly. Carriers price risk based on regional loss history. Past events in the area have tightened underwriting across the wildland-urban interface.
