Do California apartment building owners need earthquake insurance?
California law does not require earthquake insurance, but lenders often mandate it, and the state's seismic exposure makes it a critical coverage for most apartment owners.
California does not legally require apartment building owners to carry earthquake insurance, but the state's seismic risk makes it an essential consideration. The U.S. Geological Survey estimates a 72% probability of at least one magnitude-6.7 or greater earthquake striking the San Francisco Bay Area before 2043 (USGS UCERF3 model). Standard commercial property policies exclude earthquake damage per the ISO CP 10 30 exclusion, so a separate earthquake policy or endorsement is required.
Earthquake insurance for California apartments is available from private carriers and through the California Earthquake Authority (CEA) for residential properties, though the CEA program is primarily designed for homeowners and small residential structures rather than large apartment complexes. Commercial apartment earthquake policies typically carry percentage deductibles of 5% to 15% of the total insured value, meaning a $10,000,000 building with a 10% deductible requires the owner to absorb the first $1,000,000 of earthquake damage.
Fannie Mae's Multifamily Selling and Servicing Guide requires earthquake coverage for properties in Seismic Zones 3 and 4 when the Probable Maximum Loss (PML) exceeds 20% of the replacement cost. Freddie Mac's Seller/Servicer Guide imposes a similar threshold. For properties near major fault lines, lenders typically require a site-specific PML study by a seismic engineering firm. California Civil Code Section 1103 also requires disclosure of seismic hazards in certain real property transactions, which can affect the insurance and due-diligence process during acquisitions.