# The underinsurance gap
Direct answer. If your home is destroyed, the odds are better than even that your policy will not pay enough to rebuild it. That is not a Florida problem or a California problem; it shows up after every fire, flood and hurricane that produces total losses. The gap has four parts: a dwelling limit set too low, depreciation held back until you rebuild, code-upgrade costs that standard coverage excludes, and living expenses that run out before the house is done. Each one has a fix, and most of the fixes are cheap before the loss and impossible after it.
This page is written from the homeowner's side. Insurers are not villains here; the system is built on software estimates and policy forms that most people never read. Read yours tonight.
How big the gap is
The best public data comes from the Marshall Fire (Boulder County, December 2021). Researchers at CU Boulder and the University of Wisconsin examined nearly 5,000 claims from 24 insurers and found 74% of policyholders were underinsured, 36% severely (coverage below 75% of rebuild cost), by an average of about $139,000. Underinsured households were about 25% less likely to pull a rebuilding permit within a year and more likely to sell the lot. Wealth, policy age and inflation did not explain it; which insurer wrote the policy did.
United Policyholders, the consumer nonprofit, reports the same pattern from its own post-disaster surveys going back two decades: more than half underinsured after nearly every event, and nearly 75% after some California fires. A 2026 analysis of California data by law professor Ken Klein, reported by UP, found that roughly 90% of destroyed homes carried extended or guaranteed replacement cost and still came up short, which points at the carriers' own replacement-cost estimates, not the extras, as the root cause. Rebuild costs did move: Triple-I's 2024 Issues Brief put the cumulative increase in homeowners replacement costs at about 55% between 2020 and 2022, far ahead of general inflation.
The practical conclusion: your dwelling limit is a number a piece of software produced from a short questionnaire. It is a starting point, not an answer.
The four parts of the gap
1. The dwelling limit (Coverage A)
Your policy pays up to the limit, and the limit was set by an estimating tool. Market value is irrelevant; land does not burn. What matters is the cost to rebuild your specific house, in your county, after a disaster when every contractor is booked and materials are scarce.
Fixes before a loss: get an independent replacement-cost estimate every few years, buy the largest extended replacement cost endorsement available (25% to 100% above the limit; 50% is common), add inflation guard, and ask whether guaranteed replacement cost is offered. After a loss: unspent contents coverage can sometimes be applied to the dwelling; ask.
2. Depreciation and the holdback
Replacement cost policies usually pay in two steps. First the insurer pays actual cash value, which is replacement cost less depreciation for age and wear. The difference, called recoverable depreciation, is released once you repair or replace. If you never rebuild, or miss the deadline, you keep only the ACV.
Two things to know. Depreciation should apply to things that wear out, not to labor; California's claims regulations say so explicitly, and a number of other states (Arizona, Illinois and Missouri among them) restrict labor depreciation by statute or case law, so it is worth arguing everywhere. And deadlines matter: California gives at least 36 months from the first ACV payment to collect full replacement cost after a total loss; Florida requires that on a total loss the insurer pay replacement cost without any holdback, but on partial losses it may pay ACV on the roof until you prove you paid any separate roof deductible.
3. Code upgrades: ordinance-or-law coverage
Standard dwelling coverage puts back what was there. It does not pay to elevate the house because the floodplain rule now requires it, to add impact openings because the wind-borne debris code now requires them, or to demolish the undamaged half of a house the code says cannot be partially rebuilt. That is ordinance-or-law (also "law and ordinance," "code upgrade" or "building code upgrade") coverage, usually sold as 10%, 25% or 50% of the dwelling limit.
This is the coverage that pays for resilience. In Florida, every homeowner policy is deemed to include law-and-ordinance coverage at 25% of the dwelling limit unless you refused it in writing, and insurers must offer 50%. In California, a replacement-cost policy cannot be issued or renewed without building-code upgrade coverage of at least 10% of the dwelling limit, as additional coverage that does not deplete Coverage A (Insurance Code §10103(c)). Elsewhere it is often an optional endorsement that costs little and that most people decline without knowing it. If you are in a flood zone or an older house, 50% is not excessive.
4. Additional living expenses (ALE)
ALE, or loss of use, pays the extra cost of living elsewhere while you rebuild: rent, the difference in commuting, boarding pets. It is capped either in dollars (often a percentage of Coverage A) or in time (12 or 24 months), and it is the benefit that runs out first because rebuilding after a regional disaster takes two to four years. California requires at least 36 months after a declared emergency, with extensions for good-faith delays, and insurers there must advance at least four months of ALE on request after a total loss in a declared emergency (Insurance Code §2061); most states have no such rules. Read the ALE line on your declarations page; if it says 12 months, that is the single cheapest line to raise.
What California just changed. SB 876, the Disaster Recovery Reform Act, signed September 27, 2026, requires insurers to offer extended replacement cost of at least 50% above the dwelling limit and extended ALE of at least 50% above the standard limit at every issue and renewal, with a signed declination if you refuse; to give you an updated replacement-cost estimate at new business and renewal; and, on a total loss, to pay ACV within 30 days and undisputed replacement cost within 30 days of a triggering event. The Department of Insurance describes the law as taking effect January 1, 2027; law-firm summaries place its principal coverage provisions operative January 1, 2028. It is an offer mandate, not automatic coverage: you still have to say yes.
A worked example (illustrative only)
A pre-2008 Gulf Coast house insured for $340,000. Rebuild cost after the storm: $420,000. Code upgrades (elevation, impact openings, connections): $110,000. The policy, with no extended coverage and the default 25% ordinance-or-law, pays at most $340,000 plus up to $85,000 for code items, minus the hurricane deductible. Gap: roughly $100,000 to $150,000 depending on the deductible, before living expenses. With a 50% extended replacement cost endorsement and 50% ordinance-or-law, the gap closes to near zero. The numbers are invented to show the mechanics; the premium for those endorsements varies by carrier and state, and the only reliable figure is a quote on your own policy.
Closing the gap after a loss
- Get the policy and every endorsement in writing, including the replacement-cost worksheet the insurer used. You are entitled to it in most states; ask.
- Document the scope. A contractor's line-item estimate that includes code-required work is the basis of every negotiation.
- Invoke the code coverage explicitly. Adjusters do not volunteer ordinance-or-law benefits; put the request and the code citation in writing.
- Challenge depreciation on labor and on items that do not wear out.
- Use the SBA. After a disaster declaration, Small Business Administration home loans are the lowest-cost gap financing most families can get, and they can fund mitigation above the repair cost. United Policyholders recommends them first.
- Mind the second policy. Once you start rebuilding, your homeowners policy may not cover the structure under construction; builder's risk coverage is a recurring question in post-fire forums (anecdotal, r/altadena), and the answer varies by carrier.
- Consider the smaller, stronger house. A rebuild that is 15% smaller and built to code-plus, with the insurance credits that follow, can cost less to own than a same-size replica. That trade is what our advisory models.
Before the next one
Do these this month, not after the storm: an independent replacement-cost estimate; extended replacement cost of at least 50%; ordinance-or-law of 25% to 50%; ALE of 24 months or more; flood insurance regardless of zone; a photo inventory of contents. The whole package usually costs less than one month of the rent you would otherwise be paying in year three of a rebuild.
Rebuilding on a gap? BuiltStrong's advisory starts from what your policy will actually pay, then designs a path, repair, elevate or rebuild, in whichever construction system fits your budget and site. No builder allegiance; every relationship disclosed. Start the intake · How the advisory works