The Hidden Gap in HOA Earthquake Coverage: What Per-Building Deductibles Really Mean for Your Community
Many California HOA boards have earthquake insurance. Far fewer understand what it would actually pay after a major quake.
If you serve on the board of a California condominium association, there's a good chance your community carries earthquake insurance. You might even feel confident that your coverage is solid — the policy is in place, the premiums are paid, the broker reviews it every renewal.
But here's the problem: for most HOAs, there's a significant gap between what boards assume their policy will cover and what it will actually pay after a damaging earthquake. And that gap comes down to three words that rarely get the scrutiny they deserve: per-building deductibles.
How Earthquake Deductibles Work in HOA Policies
Unlike a standard homeowner's insurance policy, where you pay one deductible per claim, commercial earthquake policies for HOAs typically apply deductibles on a per-building basis. That means if your community has 40 buildings, you don't have one deductible — you have 40.
These deductibles are usually calculated as a percentage of each building's insured value — commonly 10% to 25%. So for a building insured at $5 million with a 15% deductible, the first $750,000 in earthquake damage to that building comes out of the association's pocket.
Now multiply that across every building in your community.
For a 200-unit community with 20 buildings, the aggregate deductible exposure can easily reach $10 million to $20 million — even before the policy pays a single dollar. Most boards have never seen that number.
Why This Matters More Than You Think
California sits on some of the most active seismic zones on Earth. According to the USGS, there is a greater than 99% probability of a magnitude 6.7 or larger earthquake striking the state within the next 30 years. That's not a question of if — it's a question of when and where.
When that earthquake hits, the financial reality for HOAs can be devastating:
- Moderate damage across many buildings — the most common scenario — often falls entirely within deductibles. The insurance pays nothing, but the repair bill is still in the millions.
- Special assessments become the fallback. Under the Davis-Stirling Act, boards can levy special assessments to cover uninsured losses, but these can reach five or six figures per unit. After the 1994 Northridge earthquake, some homeowners faced assessments exceeding $50,000.
- Reserve funds weren't designed for this. Most HOA reserves are earmarked for roofs, elevators, and painting — not seismic repair. Using reserves for earthquake damage creates a cascade of deferred maintenance problems.
The Per-Building Math Your Board Should Run
Here's a simplified example that illustrates the gap:
| Community | 300 units across 25 buildings |
| Average building insured value | $8 million |
| Earthquake deductible | 15% per building |
| Per-building deductible | $1.2 million |
| Aggregate deductible exposure | $30 million |
In a moderate earthquake, suppose each building sustains $800,000 in damage — well below the deductible threshold. Total damage across the community: $20 million. Amount the insurance pays: $0.
The entire $20 million falls on the association — funded through special assessments, emergency loans, or some combination. For a 300-unit community, that's roughly $67,000 per homeowner.
This isn't a worst-case scenario. It's the most likely scenario for many communities near active faults.
What Boards Should Do About It
Understanding your community's actual earthquake risk isn't just good governance — it may be a fiduciary obligation. Under California law, HOA board members have a duty to make informed decisions in the best interest of the association. When it comes to earthquake risk, "informed" means knowing your building-by-building exposure, not just the coverage limits on page one of your policy.
Here's where to start:
1. Request a Per-Building Loss Analysis
A personalized loss estimate models how each building in your community would perform in various earthquake scenarios — factoring in building age, construction type, soil conditions, and proximity to active faults. This gives the board actual numbers to work with, rather than assumptions.
2. Compare Your Coverage Against Realistic Scenarios
Once you have building-level estimates, compare them against your policy terms. Where do the deductibles bite? In which scenarios does insurance actually pay? Are there buildings where the expected damage will almost certainly fall within the deductible?
3. Explore Your Options
Armed with data, boards can make informed decisions:
- Adjust deductible levels — sometimes a higher premium with a lower deductible makes financial sense
- Negotiate policy terms — brokers need data to make the case to underwriters
- Set aside earthquake reserves — some boards create a dedicated earthquake fund to cover the deductible gap
- Communicate with homeowners — transparency about earthquake exposure reduces the shock if an assessment ever becomes necessary
4. Use Free Screening Tools
Before commissioning a full study, boards can get an initial read on their community's exposure. EQE Risk's Rapid Risk tool provides a free earthquake risk screening that takes minutes and gives your board a starting point for the conversation.
The Bottom Line
Earthquake insurance is essential for California HOAs. But having a policy isn't the same as being protected. The per-building deductible structure means that for many communities, the most likely earthquake scenarios result in millions of dollars in damage that insurance won't cover.
The boards that understand this before an earthquake strikes are the ones that can actually do something about it — adjust coverage, build reserves, or simply prepare their homeowners for what a seismic event would really mean financially.
The ones that don't find out the hard way.
EQE Risk provides independent earthquake risk assessments for California HOA communities. Our per-building loss estimates help boards understand their actual exposure and make informed insurance decisions. We do not provide insurance advice, but we provide information to help you and your insurance professionals make better decsions. Get a free screening →