Earthquake Insurance: The Basics
Earthquake damage is explicitly excluded from standard homeowners and renters insurance policies. This means if an earthquake damages your home — cracked foundation, collapsed walls, broken chimney, destroyed contents — your homeowners insurance pays nothing. You need a separate earthquake policy or endorsement.
While California gets the most attention, earthquake risk exists in 42 of 50 states. The New Madrid fault zone (Missouri, Tennessee, Arkansas), the Pacific Northwest (Cascadia subduction zone), and areas of Oklahoma, Utah, and South Carolina all have significant seismic risk. Even areas not traditionally considered earthquake-prone can experience damaging events.
1. What Earthquake Insurance Covers
Dwelling coverage: Structural damage to your home from earthquake shaking, including foundation, walls, roof, and attached structures. Coverage limits are typically tied to your home's replacement cost value.
Personal property: Damage to your belongings from earthquake shaking — furniture, electronics, clothing, and other possessions. Separate coverage limit from dwelling coverage.
Loss of use: Living expenses if your home is uninhabitable after an earthquake — hotel costs, restaurant meals, and temporary housing while your home is repaired.
NOT covered: Damage from fire following an earthquake (covered by standard homeowners insurance), flood or tsunami damage (requires flood insurance), land movement/landslide (often excluded), and vehicle damage (covered by auto comprehensive).
2. The Deductible Issue
Earthquake insurance deductibles are percentage-based, not flat dollar amounts. Typical deductibles range from 5% to 25% of the coverage limit. On a home insured for $500,000 with a 15% deductible, you pay the first $75,000 of damage out of pocket. This means earthquake insurance does not help with minor damage — it protects against catastrophic loss.
Choosing a deductible: Lower deductibles (5-10%) mean higher premiums. Higher deductibles (15-25%) significantly reduce premiums but require more out-of-pocket before coverage kicks in. Most experts recommend choosing the highest deductible you can absorb financially, since you are insuring against total loss scenarios.
3. How Much Does Earthquake Insurance Cost?
Premiums vary widely based on location, construction type, age of home, soil type, and distance from known faults. In California through the CEA (California Earthquake Authority), average annual premiums range from $800-$5,000. Outside California, premiums can be much lower — often $100-$500 per year in moderate-risk zones.
Factors that increase cost: Proximity to active faults, soft soil (amplifies shaking), unreinforced masonry construction, older homes without seismic retrofitting, and hillside locations.
Factors that decrease cost: Wood-frame construction (performs well in earthquakes), newer homes built to current seismic codes, seismic retrofitting (bolting to foundation, cripple wall bracing), and distance from active faults.
4. Do You Need Earthquake Insurance?
Consider earthquake insurance if: you live within 15 miles of a known active fault, your home is unreinforced masonry or older construction not built to seismic code, you could not afford to rebuild or make major repairs out of pocket, or your home has a large mortgage that you would still owe even if the house is destroyed.
You may skip it if: you live in a very low-risk seismic zone, your home is newer wood-frame construction (most earthquake-resistant), you have substantial savings to cover repairs, or the premium-to-benefit ratio does not make sense given your specific risk level.
Reducing Earthquake Risk
- Seismic retrofitting ($3,000-$10,000): Bolting the house to its foundation and bracing cripple walls. The most cost-effective earthquake protection. Many states offer grants and rebates for retrofitting
- Secure water heater ($15-$30): Strap your water heater to the wall to prevent tipping, gas line rupture, and fire
- Secure heavy furniture: Bolt bookcases, shelving, and heavy items to wall studs. Use museum putty under valuable items
- Flexible gas connections: Flexible connections on gas appliances prevent ruptures during shaking. Cost: $20-$50 per appliance
- Automatic gas shutoff valve ($200-$500): Shuts off gas supply automatically during strong shaking, preventing fire
Earthquake Considerations for Buyers and Sellers
If you are buying in a seismic zone, evaluate the home's construction type, foundation attachment, and proximity to faults. Newer wood-frame homes on engineered foundations perform best. Unreinforced masonry, raised foundation homes without bolting, and hillside properties carry higher risk and insurance costs.
If you are selling, seismic retrofitting can be a selling point — document the work and share it with buyers. In California, seismic hazard disclosures are required for all residential sales. Your real estate agent can help you present seismic safety features effectively and navigate disclosure requirements.