How Much Dwelling Coverage Do I Need? Rebuild Cost, Not Market Value
Dwelling coverage should match what it costs to rebuild your home, not its sale price. How to estimate rebuild cost and avoid underinsurance.
Key takeaways
- Dwelling coverage (Coverage A) should equal the full cost to rebuild your home at today's labor and material prices.
- Rebuild cost is not market value: market value includes land and location, which a fire cannot destroy.
- Many insurers require you to insure at least 80% of replacement cost; falling below that can reduce what a partial claim pays.
- Extended or guaranteed replacement cost and ordinance-or-law coverage help when rebuilding costs more than expected.
- Review your dwelling limit after renovations, additions, and periods of rising construction costs.
On this page
- What is dwelling coverage?
- Why isn’t market value the right number?
- What is the 80% rule?
- How do you estimate your home’s rebuild cost?
- Which add-ons protect against rebuilding surprises?
- How does dwelling coverage affect your other limits?
- What about flood and earthquake?
- When should you update your dwelling limit?
- Check your numbers
You need enough dwelling coverage to rebuild your home from scratch at today’s construction prices. That figure, the rebuild or replacement cost, is usually based on your home’s size, construction type, finishes and local labor and material costs. It is not the price your house would sell for, and it is not your mortgage balance.
Getting this number right matters more than almost any other part of a homeowners policy, because dwelling coverage is usually the largest limit and the hardest gap to close after a total loss. This guide explains how to think about how much dwelling coverage you need, how insurers estimate it, and which add-ons protect you when rebuilding costs more than expected.
What is dwelling coverage?
Dwelling coverage, often called Coverage A, pays to repair or rebuild the structure of your home after a covered loss such as fire or wind. It covers the house itself and things built into it, such as walls, roof, built-in cabinets and usually an attached garage.
Other parts of the policy cover different things: other structures (a detached garage, fence or shed), personal property (your belongings), loss of use (living expenses while you are displaced) and personal liability.
Why isn’t market value the right number?
Because market value includes the land and the location, and neither burns down. A house on a valuable lot can sell for far more than it costs to rebuild, while an older home with plaster walls or custom woodwork can cost more to rebuild than it would sell for.
| Number | What it measures | Right basis for dwelling coverage? |
|---|---|---|
| Market value | What a buyer would pay for the house and land | No |
| Purchase price | What you paid, at that time’s market | No |
| Mortgage balance | What you still owe | No |
| Tax assessment | A government valuation for property tax | No |
| Rebuild (replacement) cost | Labor, materials, permits and debris removal to rebuild | Yes |
What is the 80% rule?
Many insurers require you to insure your home for at least 80% of its replacement cost. The Texas Department of Insurance notes that most companies require at least 80%, and some require 100%. The NAIC gives similar guidance to insure for at least 80 percent of replacement value.
The reason it matters: if you insure for less than the required share, some policies reduce what they pay on a partial loss, not just a total one.
Insuring to 100% of the rebuild cost avoids this problem and protects you fully against a total loss.
How do you estimate your home’s rebuild cost?
Start with square footage and a local cost per square foot, then adjust for features. Insurers usually run a replacement cost estimator that asks about size, construction, roof type, foundation, number of bathrooms, finishes and special features. Ask your agent to walk you through it and check that the details are right.
| Factor | Why it changes the cost |
|---|---|
| Square footage | Larger homes cost more to build |
| Construction type | Brick, stone and custom framing cost more than standard framing |
| Finishes | Hardwood, stone counters and custom cabinets add cost |
| Roof type | Tile and slate cost more than asphalt shingles |
| Age and style | Older details can be expensive to reproduce |
| Local labor and materials | Prices vary widely by region and over time |
| Code upgrades | Rebuilding may require newer electrical, plumbing or energy standards |
The Coverlee home and renters checker includes an optional owner section that multiplies your square footage by a rebuild cost per square foot you enter. It is a quick sense check, not a replacement for your insurer’s estimate.
Which add-ons protect against rebuilding surprises?
Rebuild costs can jump after a disaster, when many homes need work at once and labor and materials are scarce. A few endorsements help close that gap.
- Extended replacement cost. Pays a set percentage above your dwelling limit, often 20% to 50%, if rebuilding costs more than expected.
- Guaranteed replacement cost. Pays the full cost to rebuild even if it exceeds the limit. Less common and usually more expensive. The NAIC notes many insurers offer it for an extra premium.
- Ordinance or law coverage. Pays for upgrades required by current building codes when you rebuild.
- Inflation guard. Raises your dwelling limit automatically each year to track construction costs.
How does dwelling coverage affect your other limits?
Many homeowners policies set other limits as a percentage of the dwelling limit. Other structures and personal property, for example, are often calculated this way. The Texas Department of Insurance gives an example of personal property set at a percentage of the dwelling limit. If your dwelling limit is too low, those limits may be too low as well.
Your personal property limit should still be checked on its own, by adding up your belongings. Our guide to how much renters insurance you need shows the room-by-room method, which works for owners too.
What about flood and earthquake?
Dwelling coverage on a standard homeowners policy generally excludes flood and earthquake. The NAIC notes that standard policies cover neither. If your area has either risk, you need separate cover; see our guide to flood insurance basics. If an uninsured disaster does strike, the IRS explains in Publication 547 how casualty losses may be treated for tax purposes, but that is no substitute for insurance.
When should you update your dwelling limit?
Review it at every renewal, and update it after:
- a renovation, addition or finished basement,
- a new roof or major system upgrade,
- a period of rising construction costs in your area,
- changes in local building codes.
Also make sure the base for your dwelling claim is replacement cost, not actual cash value. Our guide to replacement cost vs actual cash value explains why that matters, especially for roofs.
Check your numbers
Use the owner section of the Coverlee home and renters checker to sense-check your dwelling limit against your square footage and a local rebuild cost, alongside your personal property and liability. It runs in your browser and saves nothing.
Try it here: Homeowners coinsurance calculator
Showing the worked example. Change any number to see your own result.
$37,500Estimated claim payment
You carry less than the required $320,000, so the policy pays only 75% of the loss. This claim would pay about $37,500, which is $12,500 less than if you were fully insured. Raising your limit by $80,000 would remove the penalty.
- Claim payment
- $37,500
- Coinsurance penalty
- $12,500
- Coverage required by the policy
- $320,000
- Raise your limit by
- $80,000
- Share of loss paid
- 75%
Questions people ask
How much dwelling coverage do I need?
Enough to rebuild your home from the ground up at current construction costs, including materials, labor, permits and debris removal. That is usually based on your home's square footage, construction quality and local building costs, not on what the house would sell for.
Should dwelling coverage equal my home's market value?
No. Market value includes the land and the location, which do not need rebuilding. In some areas rebuild cost is lower than market value; in others, especially for older or custom homes, it can be higher.
What is the 80% rule in homeowners insurance?
Many insurers require you to insure your home for at least 80% of its replacement cost. If you fall below that, a replacement-cost claim for partial damage may be paid at a reduced amount. Some insurers require 100%.
What is extended replacement cost?
An endorsement that pays a set percentage above your dwelling limit, for example an extra 20% to 50%, if rebuilding costs more than expected, such as after a widespread disaster when labor and materials are scarce.
What is ordinance or law coverage?
Coverage for the extra cost of rebuilding to current building codes. Older homes often need upgrades, such as wiring or energy rules, when rebuilt, and standard dwelling coverage may not pay for them.
How do I estimate rebuild cost per square foot?
Ask your insurer how they calculated your dwelling limit, ask a local builder for a per-square-foot range for your type of home, or hire an appraiser for an estimate. Prices vary a lot by region and finish quality.
Does dwelling coverage include my garage or fence?
An attached garage is usually part of the dwelling. Detached structures, such as a separate garage, shed or fence, are usually covered under other structures coverage, often a percentage of the dwelling limit.
How often should I review my dwelling coverage?
At every renewal, and after any renovation, addition or major upgrade. Construction costs change over time, so a limit that was right a few years ago may be too low now.
Sources
- Homeowners Insurance — National Association of Insurance Commissioners (NAIC), accessed
- Home insurance guide — Texas Department of Insurance, accessed
- Publication 547, Casualties, Disasters, and Thefts — Internal Revenue Service, accessed
Coverlee Editorial Team
The Coverlee Editorial Team researches, writes and checks every guide against official sources such as state insurance departments, the NAIC, FEMA, the IRS and the SSA.
Educational information, not insurance, legal or financial advice. Coverlee does not sell insurance. Last updated: October 18, 2026 · Spotted an error? Tell us
