How Much Dwelling Coverage Do You Need?

Set your dwelling coverage (Coverage A) to the full cost of rebuilding your home with today's materials and labor, not its market value or purchase price. Market price includes land and location, which a fire or storm cannot destroy; rebuild cost does not. Estimate it with a replacement-cost calculator, local per-square-foot construction costs, or a professional appraisal.

Why isn't dwelling coverage based on market value or what I paid?

Coverage A pays to reconstruct the physical structure of your house, so it is tied to construction cost, not real-estate value. Market price reflects the land, the lot, the neighborhood, school districts, and current buyer demand. After a total loss, the land is still there, which is exactly why you never insure it. As the Insurance Information Institute notes, the price you paid or the current market price may be more or less than the cost to rebuild. In competitive markets, rebuild cost can sit well below market price; for older, custom, or historic homes it can run higher. Basing your limit on your mortgage balance is also a common mistake, because a loan tracks purchase price, not the cost of materials and labor.

How do I estimate my home's rebuild cost?

There are three practical ways to arrive at a defensible number. Most homeowners start with the insurer's tool and confirm it against a second method, especially if the house has custom features.

• Insurer's replacement-cost estimator: your carrier or agent runs a calculator using square footage, construction type, roof, and interior finishes to produce a rebuild figure.
• Local per-square-foot building cost: multiply your home's total square footage by current local construction costs per square foot (land excluded). Ask a builder, a builders' association, a real estate agent, or your insurance agent for that figure.
• Professional replacement-cost appraisal: for custom, historic, high-value, or unusually built homes, hire a licensed appraiser or building estimator for a detailed reconstruction cost.
• Document what raises cost: note custom cabinetry, stone countertops, hardwood floors, vaulted ceilings, and specialty materials, since generic estimates often undercount them.

Whatever method you use, treat the output as a starting point and revisit it, because construction prices move over time and vary sharply by region. Avoid anchoring to a single online figure without confirming it locally.

What happens if I'm underinsured, and how do coinsurance penalties work?

Underinsuring is the central danger with Coverage A, and it can bite you on partial losses, not just total ones. Most companies require you to insure your house for at least 80% of its full replacement cost, and some require 100%, according to the Texas Department of Insurance. Insure below that threshold and a coinsurance clause can reduce even a partial claim in proportion to how far short you fell. In practice, a home insured well under the required percentage may see a covered repair reimbursed at a fraction of its cost, with you paying the remainder out of pocket. And regardless of the coinsurance rule, your insurer will never pay more than your Coverage A limit on a total loss, so a limit set too low leaves a permanent gap.

Should I add extended or guaranteed replacement cost coverage?

Even an accurate limit can fall short when construction costs spike after a widespread disaster, when demand for materials and labor surges. Two endorsements act as a buffer. Extended replacement cost pays a set percentage above your dwelling limit, commonly in the range of 5% to 25%, giving you cushion when rebuild bills come in high. Guaranteed replacement cost goes further and pays whatever it actually costs to rebuild your home as it was, though it is offered by a limited number of insurers. Note that neither typically covers the extra cost of meeting updated building codes, so if your home is older, ask about an Ordinance or Law endorsement. An inflation guard clause, which nudges your limit up at each renewal, is a lighter-touch complement.

How do my other coverages depend on the dwelling limit?

Coverage A anchors the whole policy, because several other limits are set as a percentage of it. That is why getting the dwelling number right cascades through everything else. Typical defaults look like this, though carriers vary and you can often adjust them:

• Other structures (Coverage B): often around 10% of the dwelling limit, for detached garages, fences, and sheds.
• Personal property (Coverage C): commonly about 50% to 70% of the dwelling limit for your belongings.
• Loss of use / additional living expenses (Coverage D): frequently around 20% of the dwelling limit, covering extra costs while you cannot live at home.

If your Coverage A is too low, these downstream limits shrink with it, so a single underestimate can quietly leave you thin across the policy. Review each percentage against your actual belongings and rebuilding timeline rather than accepting the defaults blindly.

When should I update my Coverage A limit?

Update your dwelling limit any time you materially change the home: a kitchen or bath remodel, a room addition, a finished basement, or upgraded finishes all raise reconstruction cost. Renovations that add square footage or higher-grade materials are the most common reason homeowners drift into underinsurance without realizing it. Beyond project-driven updates, review the limit at every renewal so it keeps pace with local construction inflation, and re-run a replacement-cost estimate every few years even if nothing has changed structurally.

Because insurers price extended and guaranteed replacement cost, inflation guard, and their own rebuild estimators very differently, the same home can carry meaningfully different limits and premiums from one carrier to the next. Compare quotes from several insurers, ask each how they calculate your Coverage A, and confirm which buffers are included before you buy, so you are protected without overpaying.

Because insurers price these coverage choices very differently, compare before you decide. Use our coverage calculator to size your policy, then get free quotes from top insurers.