CA Hazard Zones for Home Search

Shows California fire, earthquake fault, liquefaction, and landslide zones on Zillow, Redfin, and other home search maps.

See California’s official natural hazard zones right on the map while you shop for a home. CA Hazard Zones for Home Search adds the state’s fire, earthquake, and landslide hazard maps to the search map on popular real estate sites like Zillow and Redfin. No more switching between a listing and a government map viewer to find out whether a house is in a fire zone or sits on a fault. WHAT IT SHOWS • Fire Hazard Severity Zones (Moderate, High, Very High) from CAL FIRE, covering both State Responsibility Areas (2024 map) and Local Responsibility Areas (2025 map) • Alquist-Priolo Earthquake Fault Zones from the California Geological Survey • Fault traces, drawn the way the official maps draw them: solid where accurately located, dashed where approximate or inferred, dotted where concealed, with “?” marks where the trace is uncertain • Liquefaction Zones and Earthquake-Induced Landslide Zones (Seismic Hazard Zones) from the California Geological Survey • City of Berkeley local fire zones: the 2025 city Very High and High zones, plus the city’s hillside Fire Zones 2 and 3 HOW TO USE IT • Open a home search map on a supported site and zoom in on a California neighborhood. The zones appear automatically. • Click anywhere on the map to see which zones that spot falls in, for example “Very High fire hazard (Local Responsibility Area)” or “Hayward Fault: approximately located”. • A small legend on the map explains the colors and line styles. • Use the toolbar button to turn layers on or off, adjust opacity, or hide the legend. WHERE IT WORKS Most major U.S. home search and brokerage sites. It works with search maps built on Google Maps, Mapbox or Leaflet. Hazard data covers California only. PRIVACY The extension doesn’t collect, store, or send any personal information, and it has no analytics or tracking. To draw the zones it requests map data for the area you’re viewing directly from the public CAL FIRE, California Geological Survey and City of Berkeley map services. Your layer settings are saved in Chrome’s own storage. IMPORTANT This extension is for general information while you browse. The zones are display copies of official data and are simplified slightly for speed, so they aren’t precise enough to decide whether a specific property is in a zone. For a legal determination, rely on the Natural Hazard Disclosure (NHD) report for the property and the official maps from CAL FIRE, the California Geological Survey, and your city or county. Not affiliated with or endorsed by any real estate website, CAL FIRE, the California Geological Survey or the City of Berkeley.