Earthquake is the coverage most commercial building owners in Oregon and the wider Cascadia region know they should think about and most keep deferring. Part of the reason is that the options are genuinely confusing, and part is that the deductibles look frightening at first glance. There are three main ways to cover a building, and they really do differ. The honest review is that the right one depends on your building and your deductible tolerance, not on the lowest premium.
Why you have to add it
Standard commercial property policies generally exclude earthquake, so an owner who never raised the subject almost certainly has no earthquake protection, even on an otherwise thorough policy. That is the starting point. Covering the exposure is a deliberate act, and it comes through one of three routes, each with its own trade-offs in limit, terms, and available capacity.
The endorsement
Adding earthquake as an endorsement to your existing property policy is the simplest route. Same carrier, same policy, one more coverage part. For a straightforward building it can be an efficient way to address the exposure, and the administrative simplicity is a real advantage. The limits and terms are tied to what that carrier offers, so the fit is only as good as their earthquake appetite for your building. It is worth reading the endorsement terms rather than assuming it mirrors the rest of the policy.
Standalone and DIC
A standalone earthquake policy is separate coverage bought specifically for the peril, often through carriers that specialize in it. A difference-in-conditions policy is a broader standalone form that can pick up earthquake and, in some cases, flood together. Both can offer more capacity or broader terms than an endorsement, which matters on higher-value buildings or where you want more than one carrier will write. The trade-off is a second policy to manage and terms that need comparing against the endorsement rather than assumed to be better. Our fuller comparison of standalone versus endorsement gets into the specifics.
The deductible reality
This is the part owners underestimate. Earthquake deductibles are usually a percentage of the insured value, not a flat dollar amount, and that percentage can translate into a large sum on a real building. An owner who compares only premiums can bind coverage that looks affordable and carries a deductible they never worked out in dollars. Before choosing any option, convert the percentage into an actual figure for your building and ask whether you could absorb it. That number, more than the premium, tells you whether the coverage would function the way you expect.
Questions to ask your advisor
- Is earthquake currently excluded on my property policy, and by how much?
- What would my percentage deductible actually cost in dollars on this building?
- Would an endorsement, a standalone policy, or a DIC fit my building best?
- What limits and capacity can a carrier realistically offer on my building?
- How does the deductible differ across the options I am comparing?
Earthquake coverage for a commercial building comes down to matching the route to the building and being honest about the deductible you would face. An endorsement suits simple cases, a standalone or DIC suits buildings that need more capacity or broader terms, and the percentage deductible deserves more attention than the premium. Work the real numbers before you decide, and the choice gets a lot clearer.
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