Earthquake Insurance in Washington State: What Your Home Policy Won't Pay For

11.3%. That's the share of Washington residential insurance policies with any earthquake coverage in the last count by the Office of the Insurance Commissioner (OIC): about 1 in 9. West of the Cascades it was 13.8%; east, 1.7%. Those are policies in force at the end of 2016, the most recent state figures I could find.

The other number: in September 2025 the U.S. Geological Survey put an 85% chance on a magnitude 6.5 or larger deep earthquake under the Puget Sound region in the next 50 years, and 10% to 15% on a magnitude 9 on the Cascadia Subduction Zone.

A standard homeowners policy doesn't pay for shaking damage. I won't tell you whether to buy it. That depends on your house, your ground, your mortgage and your cash, and I'll lay those out.

The odds, from USGS

USGS gives each kind of western Washington quake its own odds in its 2025 fact sheet:

Source: USGS Fact Sheet 2025-3050, version 1.1 (September 30, 2025). The 10% figure treats quakes as random in time; the 15% figure accounts for the time since 1700.

These are odds of a quake somewhere in the region, not of damage to your house. Shaking depends on distance, depth and ground. USGS notes the deep quakes did their worst damage near the epicenter and where soft soils sit near the surface.

The last deep one, Nisqually, hit on February 28, 2001: M6.8, about 32 miles down. It damaged the SR 99 viaduct in Seattle and the Capitol dome in Olympia, and unreinforced masonry buildings took the worst structural damage (WA DNR). Insured losses were about $305 million (OIC). Estimates of total damage run from $500 million to $4 billion, depending on the source (WA Emergency Management Division).

Who actually has earthquake coverage

The OIC's 2017 Earthquake Data Call Report (dated January 2018, released February 2018), covering policies in force at the end of 2016, is the only official count I could find. The OIC called 11.3% "higher than predicted," and in the same report said the rate "does not adequately mirror the projected risk." By county:

Thurston18.1%Clark16.4%Kitsap16.0%King15.7%Western WA13.8%Snohomish12.9%Pierce12.2%Statewide11.3%Whatcom8.0%Skagit7.5%Eastern WA1.7%Spokane1.2%

Source: WA OIC, 2017 Earthquake Data Call Report (dated January 2018, released February 2018). County rates read from the report's map; the statewide, regional, Thurston, Clark and Kitsap figures also appear in its text.

Show the numbers

Area	Share with earthquake coverage
Thurston	18.1%
Clark	16.4%
Kitsap	16.0%
King	15.7%
Western WA	13.8%
Snohomish	12.9%
Pierce	12.2%
Statewide	11.3%
Whatcom	8.0%
Skagit	7.5%
Eastern WA	1.7%
Spokane	1.2%

Thurston, Clark and Kitsap had the highest rates in the state, with King close behind. In Whatcom and Skagit it drops: 8.0% and 7.5%. That's not because the north end is quiet. Whatcom County's hazard mitigation plan says the entire county is exposed to earthquake hazard, describes faults beneath Sandy Point and Birch Bay capable of M6.0 to M6.5, and rates 83.6% of Sumas's land area as moderately to highly susceptible to liquefaction.

The OIC also found that homes with earthquake coverage were worth 65% more than the average insured home, and flagged a possible affordability problem for owners of more modest houses.

You'll also see higher Triple-I survey figures. In its 2020 consumer poll, 28% of homeowners in the West said they had earthquake insurance; in a 2023 survey with Munich Re, over 37% of residents in the western U.S. said they had bought earthquake coverage. Those are self-reported answers, not policy counts, so they don't line up against the OIC's 11.3%. For California, the regulator publishes policy counts every year:

Sources: WA OIC, 2017 Earthquake Data Call Report (dated January 2018, released February 2018); California Department of Insurance, 2025 earthquake policy count summary (July 2026). The states collect data differently: rough context, not a ranking.

North of the border, a paper in the NAIC's Journal of Insurance Regulation (Vol. 39, 2020) put take-up in B.C.'s Lower Mainland above 60%, against roughly 14% west of the Cascades here (the same OIC figure).

What your homeowners policy pays after a quake

The OIC puts it plainly: homeowner insurance usually doesn't cover earthquakes. The NAIC's home insurance guide says the Special Form, the most popular homeowners form, commonly excludes earthquake, and the OIC says quake-triggered land movement is usually excluded too. But some of what a quake causes is a different peril, and that part can still be a claim:

Sources: WA OIC, Earthquake insurance; WA OIC, Landslide insurance; OIC handout, Earthquake insurance: Is it right for you? (2017); Triple-I, Background on earthquake insurance; NAIC, A Consumer's Guide to Earthquake Insurance. Your policy's wording controls.

Fire is the row people miss. Triple-I and the NAIC both say fire after a quake, including one from a ruptured gas line, is a homeowners claim, and earthquake policies exclude fire. Loss of use runs the other way: if shaking makes the house unlivable, the home policy won't pay your extra living costs, because the cause isn't a covered peril (NAIC).

Flood needs its own policy (see Washington flood insurance). Quake damage to a car falls under the comprehensive part of an auto policy, per Triple-I (see Washington auto insurance). The rest of what a home policy does is on the Washington home insurance page.

How earthquake coverage works

You add it to a homeowner or renter policy as an endorsement, or buy it as a separate policy (OIC). In the same 2017 OIC report (end-2016 data), 96.2% of the admitted insurers selling residential earthquake coverage offered it as an endorsement, and 16.3% of residential insurers didn't offer it at all. The OIC's current homeowner guide still says not every company does. Those that do may inspect first, and may require you to bolt the house to its foundation, brace interior walls or strap the water heater.

For ground movement more broadly, the OIC describes a Difference in Conditions (DIC) policy covering landslides, mudflows, earthquakes and floods, which an agent may be able to place with a surplus line insurer.

Beyond repairs to the house, the OIC says a typical earthquake form covers your belongings, debris removal and extra living costs. It may cover the extra cost of meeting current building codes, stabilizing the land under the house, and detached structures. Besides the items in the table, it excludes damage that existed before the quake and water from outside.

Contents have their own rules. The OIC handout says most earthquake policies cover contents, but usually not when the structure wasn't damaged or the deductible hasn't been met. Broken dishes in a structurally sound house may not be a claim. The building, contents and detached structures like garages and retaining walls can each carry a separate deductible (OIC).

Timing. The OIC says that after an earthquake you usually have to wait a while before you can buy coverage. It doesn't say how long. Either way, don't count on buying it the morning after.

The deductible, in dollars

Earthquake deductibles are a percentage, not a flat amount. The OIC's earthquake page says they're usually 10% to 25% of the most your policy will pay for the building: the dwelling limit on your declarations page. The policy pays only the damage above that. The OIC's homeowner guide puts the usual range at 10% to 20% and says insurers may offer higher, and in the 2017 OIC report 10% to 15% was the most common, with a range of 0% to 40%.

Example: say your dwelling limit is $600,000.

0$50K$100K$150K$200K

$60K

$90K

$120K

$150K

10%15%20%25%

Source: Deductible range from WA OIC, Earthquake insurance; dollar amounts are example math.

Show the numbers

	Deductible
10%	$60K
15%	$90K
20%	$120K
25%	$150K

Now say a quake does $180,000 of damage to that house (a made-up number):

• You pay (deductible)
• Policy pays

0$50K$100K$150K$200K

10%15%20%25%

Source: Example math using the 10% to 25% range on the OIC's earthquake page. Real forms may apply separate deductibles to contents and other structures.

Show the numbers

	You pay (deductible)	Policy pays
10%	$60K	$120K
15%	$90K	$90K
20%	$120K	$60K
25%	$150K	$30K

At 10%, the policy pays $120,000. At 25%, $30,000. If the damage were $55,000, it would pay nothing at any of these levels, since that's below even the 10% deductible.

The 2017 OIC report said it directly: because of the deductible, many earthquake policies only pay off when a significant portion of the structure is damaged. That's the job this coverage does. It isn't for cracked drywall. It's for the house that slides off its foundation. In the same example, a total loss at 15% means you carry $90,000 and the policy pays up to $510,000, if the limit matches the rebuild cost.

What to do: multiply your dwelling limit by the percentage you're quoted, and ask yourself where that money would come from. Then ask whether contents and detached structures carry their own deductibles on top.

What FEMA and the SBA can and can't do

Federal aid exists. The grants are small, and the bigger money is a loan.

FEMA's household grants come only after a declared emergency or major disaster. By law, FEMA can't pay for anything your insurance covers, and the OIC's FEMA page says it generally doesn't cover full rebuilding costs or insurance deductibles. For disasters declared on or after October 1, 2025, the cap is $44,800 for housing assistance plus a separate $44,800 for other needs, per household (Federal Register notice, published September 29, 2026). FEMA adjusts it each year for inflation; no newer figure was out as of this writing.

SBA disaster loans go up to $500,000 for a primary residence and $100,000 for belongings. They're loans, and insurance payouts may be deducted from what you can borrow.

Sources: FEMA, Notice of maximum amount of assistance under the IHP (disasters declared on or after Oct. 1, 2025); U.S. Small Business Administration, disaster assistance; WA OIC, Filing a FEMA assistance claim.

On that hypothetical $300,000 repair, the maximum FEMA housing grant still leaves $255,200. An SBA loan could cover it, as a second debt next to your mortgage. The mortgage doesn't pause either: the OIC reminds owners they still have to pay it.

Condo owners: two policies, two gaps

The OIC's condo insurance page lists "flood or earth movement" among the things a standard unit owner policy (HO-6) doesn't cover. Your unit policy won't pay for quake damage unless earthquake coverage has been added to it.

The building falls under the association's master policy. Washington's condo statutes (RCW 64.90.470 and, for older condominiums, RCW 64.34.352) require insurance against risks of direct physical loss "commonly insured against," to at least 80% of actual cash value, where reasonably available. Neither mentions earthquakes, so don't assume your building has the coverage.

Read the Certificate of Insurance. Owners get one each year when the master policy renews, showing its limits and deductible (OIC). Look for earthquake and its deductible. The OIC notes you may owe the master policy's deductible for damage to your unit.

Check loss assessment coverage. If a loss runs past the master policy, the association can assess owners. The OIC says that if the cause of the damage is covered under your unit policy, the loss assessment for that cause is covered too. So don't count on an earthquake assessment being covered unless your unit policy has earthquake coverage that extends to assessments. Ask to see that in writing, along with the limit.

Retrofitting: bolts, bracing and Seattle's plan set

Washington adopted its first statewide building code in 1975, and the Seattle Fault and the Cascadia Subduction Zone first went into the state building code in 2005, per DNR's homeowner's guide to earthquakes. Its point: the code your house was built to may not be enough for the hazards we know about now.

In older wood-frame houses, the weak spots are usually below the floor:

• No anchor bolts. Many older houses aren't bolted to their foundations and can shake off them. DNR says a handy homeowner can anchor a stem-wall foundation, at far less cost than a new foundation after a quake.
• Unbraced cripple walls. These short wood walls between the foundation and the first floor can buckle in sideways shaking. Bracing them with plywood or OSB is, per DNR, likely too advanced for most homeowners.
• Masonry chimneys. DNR suggests replacing an unreinforced chimney above the roofline with a lighter metal flue.

Seattle's Earthquake Home Retrofit Permit uses prescriptive plan sets built on the "ABC": anchor the house to the foundation, brace the wall between the foundation and the first floor, and connect that wall to the floor framing. If your house fits the plan set's eligibility table, you don't need a design professional, the permit fee is reduced, and initial review typically takes two weeks. Elsewhere in the state, the Washington Association of Building Officials publishes a standard plan set on the same approach.

I couldn't find a statewide Washington retrofit grant like California's Earthquake Brace + Bolt (up to $3,000), or any Washington rule requiring insurers to discount for a retrofit. The state Emergency Management Division suggests asking local building officials about grants and tax breaks, and the NAIC says retrofitting can lower an earthquake premium, so ask. DNR adds that a retrofit doesn't guarantee a house comes through undamaged.

Is it worth it? The factors that decide it

There's no answer that fits every Washington homeowner. These are the factors that move it:

1. The house. Brick homes, wood-frame homes with crawl spaces and multi-story homes are more likely to be damaged, per the OIC's handout. Add the build year (before 1975? before 2005?) and whether it's bolted and braced.

2. The ground. River valleys, deltas, tidal estuaries and man-made fill can liquefy, and parts of Seattle, Tacoma and Olympia sit on fill over former tidelands (WA DNR). Look up your address on DNR's Geologic Information Portal.

3. The mortgage. The lender still expects payment if the house is destroyed. Owe $400,000 on a house nobody can live in, and you still owe $400,000, plus rent somewhere else.

4. Your equity. If most of your net worth is in the house, an uninsured total loss takes most of it. If you own a modest house outright and have large savings, carrying the risk yourself is a real option.

5. Cash versus the deductible. 15% of a $600,000 limit is $90,000. The deductible you pick also helps set the price, along with location, age, construction and rebuild cost (OIC handout).

Questions to ask before you decide

1. Do I have any earthquake coverage now? Look for an earthquake endorsement on the declarations page.
2. What's the deductible in dollars, and do contents and detached structures have their own?
3. Is brick or stone veneer covered? Chimneys?
4. Are extra living costs, building-code upgrades and land stabilization covered, and up to what limits?
5. Are my belongings covered if the house has no structural damage?
6. How does the policy define an earthquake? The OIC says the policy spells this out, along with its limitations.
7. Will the insurer inspect first? Does it require bolting, bracing or water-heater straps, and is there any credit for a retrofit?
8. Condo owners: does the master policy include earthquake, what's its deductible, and does my loss assessment coverage apply?
9. If the house were destroyed tomorrow, what would I still owe the lender? That one comes from the OIC's own handout, and it's where I'd start.

FAQ

Does homeowners insurance cover earthquakes in Washington?

Not the shaking damage. The OIC says homeowner insurance usually doesn't cover earthquakes; you add earthquake coverage to the policy or buy it separately. A standard home policy does usually cover fire caused by an earthquake, such as one started by a broken gas line.

How much is the earthquake insurance deductible in Washington?

It's a percentage of the dwelling limit, usually 10% to 25% according to the OIC's earthquake page. On a house insured for $600,000, that's $60,000 to $150,000 before the policy pays anything on the house.

Does FEMA pay to rebuild a house after an earthquake?

No. FEMA grants go toward repairs that make a home safe, sanitary or functional, and generally not full rebuilding costs or insurance deductibles. For disasters declared on or after October 1, 2025, the housing assistance maximum is $44,800 per household. SBA disaster loans of up to $500,000 for a primary residence have to be repaid.

Does condo insurance cover earthquakes in Washington?

A standard condo unit policy (HO-6) doesn't cover earth movement, per the OIC. Whether the building is covered depends on the association's master policy, so check the Certificate of Insurance and ask whether your loss assessment coverage applies to an earthquake.

Is earthquake insurance worth it in Seattle?

There's no single answer. It depends on the house's age and construction, the soil under it, how much you owe on the mortgage, how much of your net worth is in the home, and whether you could pay a deductible of 10% to 25% of the dwelling limit.

Your own policy wording and Washington law control. Confirm your situation with a licensed agent or the Washington OIC (Consumer Advocacy, 800-562-6900), or with an attorney for legal questions. More common questions are on the Washington insurance FAQ.

Sources

1. WA OIC: Earthquake insurance
2. WA OIC: Insurance for natural disasters
3. WA OIC: Landslide insurance
4. WA OIC: A consumer's guide to homeowner insurance (PDF)
5. WA OIC: 2017 Earthquake Data Call Report (dated January 2018, released February 2018); copy hosted on DocumentCloud, as the OIC's own link no longer resolves
6. WA OIC: Earthquake insurance: Is it right for you? (handout, Nov. 2017, hosted by WA EMD)
7. WA OIC: Learn how condo insurance works
8. WA OIC: Filing a condo unit insurance claim
9. WA OIC: Filing a FEMA assistance claim
10. NAIC: A Consumer's Guide to Home Insurance (PDF)
11. NAIC: A Consumer's Guide to Earthquake Insurance (PDF)
12. Triple-I: Background on earthquake insurance and risk
13. Triple-I: Facts + Statistics: Earthquakes and tsunamis
14. USGS Fact Sheet 2025-3050: earthquake hazards in the Pacific Northwest (Sept. 2025)
15. USGS Fact Sheet 2025-3050 (PDF)
16. WA DNR: Earthquakes and faults
17. WA DNR: Nisqually earthquake fact sheet (Feb. 2026)
18. WA DNR: A Homeowner's Guide to Earthquakes in Washington State (PDF)
19. WA DNR: Geologic Information Portal
20. WA Emergency Management Division: Earthquake
21. Federal Register: FEMA notice of maximum IHP assistance, FR Doc. 2026-19854 (Sept. 29, 2026)
22. U.S. Small Business Administration: Disaster assistance
23. RCW 64.90.470: Insurance (Uniform Common Interest Ownership Act)
24. RCW 64.34.352: Insurance (Condominium Act)
25. City of Seattle SDCI: Earthquake Home Retrofit Permit
26. Washington Association of Building Officials: Earthquake Home Retrofit
27. California Residential Mitigation Program: Earthquake Brace + Bolt
28. California Department of Insurance: Earthquake premium and policy count data call, 2025 summary
29. Kelly, Bowen and McGillivray: The Earthquake Insurance Protection Gap: A Tale of Two Countries, Journal of Insurance Regulation (NAIC), Vol. 39, No. 11 (2020)
30. Whatcom County Natural Hazards Mitigation Plan 2021, Section 2
31. Whatcom County Natural Hazards Mitigation Plan 2021, Section 3
32. Whatcom County Natural Hazards Mitigation Plan 2021, City of Sumas annex