How to Check Your Fire Hazard Severity Zone

By Address, Zip Code, and County

If you own a home anywhere near the East Bay hills, the fastest way to find your fire hazard severity zone is CAL FIRE’s own map tool, not a private company’s estimate. If you would rather enter an address directly instead of navigating the state’s map viewer, our fire hazard zone checker tool runs the same lookup. Type your address into the Fire Hazard Severity Zone Viewer, published by the Office of the State Fire Marshal, and the map returns your exact designation: Moderate, High, or Very High. That single result determines whether Zone Zero’s five-foot ember-resistant rule applies to your property at all, and it is the starting point for nearly every other fire-safety requirement homeowners in this region eventually run into.

The Official Fire Hazard Severity Zone Viewer

California’s Office of the State Fire Marshal, a division within CAL FIRE, maintains the state’s official fire hazard severity zone maps. These are not advisory guidelines. Zone designations are backed by state law, and they determine which properties fall under mandatory defensible space and building code requirements. OSFM publishes an interactive viewer at osfm.fire.ca.gov where anyone can search a specific address and see the zone that applies to it.

A handful of private sites and blogs publish their own fire zone maps or estimates, sometimes pulled from outdated data or rough county boundaries rather than the parcel-level detail the state maintains. For anything tied to compliance, insurance, or a building permit, the OSFM viewer is the source that holds up if a question ever comes down to the official record.

Looking Up Your Address, Step by Step

1. Open the viewer and find the search field. The tool opens to a statewide map of California, with a search bar for entering a specific location.
2. Enter your full street address. Type your complete address, including city and zip code, then select your address from the suggestions that appear, the same way you would in any map application.
3. Let the map zoom to your parcel. Once you select your address, the map recenters and zooms in until you can see your property alongside the surrounding parcels and streets.
4. Read the color overlay. Fire hazard severity zones are color-coded, generally running from yellow (Moderate) to orange (High) to red (Very High). Your parcel sits inside one of these colored zones, or in some cases outside any zone if the state has not designated the area as fire-hazard-rated.
5. Check the legend. The viewer includes a key explaining what each color represents. Use it to confirm exactly which severity level your parcel’s color corresponds to, rather than guessing from the shade alone.
6. Note whether you sit in an SRA or LRA. Along with the severity zone, the map typically indicates whether your property falls in a State Responsibility Area or a Local Responsibility Area, which matters for the next question: who actually enforces the rules for your specific address.

What Moderate, High, and Very High Actually Mean

The three tiers are not just a warning label. Each one carries different legal weight.

Moderate zones sit at the lowest end of the scale. Properties here are not automatically subject to the state’s mandatory defensible space and Zone Zero requirements, though a local jurisdiction can still choose to apply its own rules on top of the state minimum.

High zones carry meaningfully more risk, and depending on whether the property sits in a State Responsibility Area or a Local Responsibility Area, may trigger local building and vegetation requirements even before the strictest state rules apply.

Very High Fire Hazard Severity Zones are where the state’s mandatory defensible space law and the phased Zone Zero rollout apply most directly. Properties in this tier face the strictest requirements: full 100-foot defensible space maintenance, the five-foot Zone Zero standard as it phases in locally, and often additional building code requirements for anything built or substantially remodeled going forward. Much of the hillside terrain across Berkeley, Oakland, Piedmont, Orinda, and Moraga falls into this tier.

Reading Your Results for Your Specific Property

A fire hazard severity zone map is drawn at a broad scale, based on terrain, vegetation, and fire history across an entire region, not surveyed lot by lot. That means two adjacent properties can occasionally sit on opposite sides of a zone boundary, and a boundary line running through the middle of a hillside neighborhood is not unusual.

If your property sits close to a boundary on the map, zoom in as far as the tool allows and confirm which side of the line your actual structure sits on, not just the general area. A screenshot or printed map from a few years ago may not reflect the current boundary either, since OSFM periodically updates these maps as fire data changes. When in doubt, your local fire department or building department can confirm your exact designation using the same records the state maintains, and that confirmation is the version that holds up if a permit or insurance question ever comes down to it.

State Responsibility Area vs. Local Responsibility Area

Your fire hazard severity zone tells you how much risk the state has mapped for your property. Whether you sit in a State Responsibility Area (SRA) or a Local Responsibility Area (LRA) tells you who enforces the rules that come with it.

In a State Responsibility Area, CAL FIRE carries direct fire protection responsibility and handles inspection and enforcement of defensible space requirements. Most SRA land sits in unincorporated, wildland-adjacent areas.

In a Local Responsibility Area, that job belongs to a city or county fire department instead. Much of the incorporated East Bay hills, including cities like Berkeley, Oakland, and Orinda, fall under LRA jurisdiction even where the fire hazard severity zone itself is rated Very High. That distinction matters because a Local Responsibility Area fire authority sets its own enforcement timeline and, in some cases, stricter local standards than the state’s own default schedule.

If your city or county fire department gives you a different answer than the state map shows, ask them directly which record they are using. Local agencies sometimes maintain their own supplemental maps or apply additional ordinances on top of the state’s zone designation, and their answer is the one that governs your specific compliance deadline.

How Your Zone Affects Insurance and Building Codes

A fire hazard severity zone designation reaches beyond a compliance checklist. Insurance carriers writing policies in Very High Fire Hazard Severity Zones have grown more selective in recent years, and some ask directly about a property’s zone, along with defensible space and Zone Zero compliance, before renewing or writing a new policy. This is not a universal rule, and it varies by carrier, so asking your insurance agent directly whether your specific zone affects your premium or renewal terms is worth doing before a renewal notice forces the question.

Building codes follow a similar pattern. Homes built or substantially remodeled inside a Very High Fire Hazard Severity Zone are typically required to meet California’s Chapter 7A building standards, covering ignition-resistant materials for roofing, vents, siding, decks, and windows, regardless of when the rest of the neighborhood is required to comply. Anyone planning new construction or a major addition in one of these zones should confirm the current building code requirements with their local building department before finalizing plans, since the exact standard can vary by zone and by jurisdiction. Our Zone Zero and insurance guide covers how carriers weigh a zone designation at renewal.

What to Do Once You Know Your Zone

Finding your zone designation is the first step, not the last one. If your address comes back Very High, or even High depending on your local jurisdiction, the practical next step is understanding what the designation actually requires, starting with the ember-resistant Zone Zero rule for the five feet closest to your home. Our Zone Zero explainer covers exactly what that standard requires and how the state has been rolling it out, and our complete defensible space guide walks through the full 100-foot picture, from Zone 0 out to Zone 2.

From there, a licensed contractor familiar with fire hazard requirements can walk your specific property, compare what is currently there (a wood fence against the house, mulch under a window, shrubs pressed against a wall) against what your zone actually requires, and put together a plan that satisfies the standard without unnecessary cost. Getting that assessment before a deadline or a permit application forces the decision gives you more room to plan the work on your own schedule. Our Zone Zero compliance timeline covers how that phase-in schedule works and how to find your specific deadline.

If You Think Your Zone Designation Is Wrong

Occasionally a property owner looks up their address and gets a result that does not match what they expected: a rural-feeling lot showing Moderate, or a suburban block showing Very High. The map is built from terrain, vegetation, and fire history data, so results can genuinely surprise homeowners whose sense of their own risk does not match the state’s model.

If you believe your zone designation is incorrect, the first call is your local fire department or building department, not a dispute filed with CAL FIRE directly. Local agencies field questions about how a specific parcel is mapped and can explain the data behind your designation, or direct you to the correct process if a correction is actually warranted. A designation review moves on fire science data, not a quick appeal, so in the meantime, your current mapped designation is the one that applies to any deadline or building requirement your property faces.

Start With Your Actual Zone, Not an Assumption

Every other decision, whether Zone Zero applies to your fence, how much defensible space your property needs, whether your insurance renewal is at risk, starts with knowing your actual fire hazard severity zone rather than guessing from a neighbor’s experience or a general sense of the neighborhood. The state’s own viewer takes a few minutes to search, and the result is the same record any contractor, insurance agent, or building department will reference later. Look up your address, note your zone and your SRA or LRA status, and use that as the starting point for whatever comes next.

Frequently Asked Questions