Is My California Home Underinsured? How to Check Before a Loss
Construction costs jumped, but a lot of policies did not keep up. After the 2025 fires, underinsurance was one of the most common and most painful surprises. Here is how to check yours now, while you still can.
A lot of California homes are quietly underinsured, meaning the dwelling limit on the policy is lower than what it would actually cost to rebuild the house today. It is one of the most common problems I find when I read a policy, and it is invisible until the worst moment: after a total loss, when the payout falls short of the rebuild. The good news is that it is easy to check and usually easy to fix, as long as you do it before you file a claim, not after.
Why are so many homes underinsured right now?
Because construction costs rose sharply and many policies did not keep up. Your dwelling limit is supposed to reflect what it costs to rebuild your home, and when labor and materials jump, that number should rise too. A lot of policies are still carrying limits set before the recent run-up in building costs, which leaves a gap.
The cost to rebuild a home went up a lot over the last few years, faster than most people's coverage adjusted. If your dwelling limit has not been reviewed recently, there is a real chance it reflects an older, lower construction cost. This was one of the hardest lessons of the 2025 Los Angeles fires: many owners discovered after a total loss that their policy limit would not cover an actual rebuild at current prices. The time to find that out is now, not then. The same forces I described in why California premiums went up are the ones that quietly pushed rebuild costs past a lot of policy limits.
What is replacement cost, and how is it different from market value?
Replacement cost is what it would cost to rebuild your home from scratch with similar materials and quality. It is not the market value, and not what you paid. Market value includes the land, location, and the market; replacement cost is just the structure. In many California areas the home can be worth far more than it costs to rebuild, and in others the reverse is true.
This confuses people constantly, so let me be clear. The price you paid for your home and the price it would sell for both include the land and the desirability of the location. Your insurance does not rebuild the land; it rebuilds the structure. So your dwelling limit (often called Coverage A) should be based on a construction cost estimate, not on your purchase price or a real-estate site's value estimate. A $1.5 million home might cost $700,000 to rebuild, or a modest home on expensive land might cost more to rebuild than it would sell for. The number you want is the rebuild cost.
What is extended or guaranteed replacement cost?
They are buffers above your dwelling limit. Extended replacement cost pays a set percentage over your limit, often 10% to 50%, if rebuild costs come in higher than expected. Guaranteed replacement cost pays the full cost to rebuild with no cap. Both protect you against exactly the underinsurance problem, and in a volatile cost environment they are worth asking for.
Even a carefully set limit can fall short, because after a widespread disaster, rebuild costs spike as everyone rebuilds at once. That is what these features protect against:
- Extended replacement cost gives you a cushion above your limit, commonly an extra 10% to 50%, so a cost overrun does not leave you short.
- Guaranteed replacement cost pays whatever it actually costs to rebuild, with no cap. It is the strongest protection and is harder to find in high-catastrophe states, but worth asking about.
- Inflation guard nudges your limit up automatically each year to track construction costs, which helps you avoid drifting back into underinsurance.
Do not forget ordinance and law coverage
When you rebuild after a loss, you have to rebuild to today's building codes, which can cost much more than the original construction. Ordinance and law coverage pays that extra code-upgrade cost. Standard policies often include only a small amount, so older homes especially may need more added by endorsement.
This is a gap inside the gap. Say a fire destroys an older home. The rebuild has to meet current codes, which might mean new electrical, updated framing, fire-resistant materials, or accessibility requirements the original house never had. Ordinance and law coverage pays for that difference. Many policies include it only at a low percentage of the dwelling limit, which can fall short on an older home. It is worth checking the amount you carry and raising it if your home predates current codes.
How do I actually check if I am underinsured?
Compare your dwelling limit against a real rebuild-cost estimate, not your home's market value. If the limit is meaningfully below the rebuild cost, you have a gap. Review it every year or two, because construction costs move. A broker can run a replacement-cost estimate and read your policy for the supporting features.
- Find your dwelling limit. It is the Coverage A figure on your declarations page.
- Get a rebuild-cost estimate. Based on your home's square footage, construction, and local building costs, not its market value or your purchase price.
- Compare the two. If your limit is well below the rebuild estimate, you are underinsured and should raise it.
- Check the supporting features. Do you have extended or guaranteed replacement cost? Inflation guard? Enough ordinance and law coverage for the age of your home?
- Re-check periodically. Costs change, and so do renovations you make. A limit that was right three years ago may not be right now.
Underinsurance is the kind of problem that costs nothing to fix today and a fortune to discover after a loss. If you want a straight answer, send me your declarations page and your home's basic details, and I will run a rebuild estimate, compare it to your limit, and tell you whether you are covered to actually rebuild. If you are fine, I will tell you that too.