How Much Dwelling Coverage Do I Need to Rebuild My Home?

You need enough dwelling coverage to fully rebuild your home at today's construction costs, using similar materials and quality. That figure is your home's replacement cost, and it is usually different from its market value, purchase price or mortgage balance. Most insurers estimate it for you, but you should check their number rather than accept it blindly.

Dwelling coverage, also called Coverage A, is the largest limit on your policy and the one that matters most after a major fire or storm. Set it too low and you may be unable to rebuild; set it too high and you pay for coverage you cannot use. Here is how to land on the right number.

What dwelling coverage pays for

Dwelling coverage pays to repair or rebuild the house itself and anything attached to it, such as an attached garage, porch or deck, plus built-in fixtures like cabinets, flooring, plumbing, wiring and heating systems. Detached structures fall under a separate limit, and your belongings are covered under personal property. For how all the parts fit together, see what homeowners insurance covers.

Why market value is the wrong number

The price you paid or could sell for includes things that do not burn down.

In high-priced metro areas, land can make up a large share of a home's value, so insuring to market value overinsures the house. In areas with older, well-built homes and modest prices, rebuilding with comparable plaster walls, hardwood trim or masonry can cost more than the home would sell for, so insuring to market value leaves you short.

How to estimate your home's replacement cost

Start with the insurer's estimate

Most insurers use a replacement cost estimator that factors in square footage, construction type, number of stories, roof type, finishes and local labor and material prices. Ask for a copy of the estimate and review the inputs. Errors in square footage, the number of bathrooms or the grade of finishes are common and directly affect the result.

Cross-check with local rebuilding costs

A simple check is to multiply your finished square footage by a local per-square-foot rebuilding cost. Local builders, contractors or an independent appraiser can give you a realistic range for your area and finish level. Rebuilding after a disaster is often more expensive than new construction because of demolition, debris removal, working around an existing foundation and demand spikes after widespread damage.

Account for what makes your home different

Adjust upward for features that are expensive to replicate:

• Custom millwork, plaster walls or specialty masonry
• High-end kitchens, bathrooms and flooring
• Complex rooflines, slate or tile roofing
• Hillside or difficult-access lots
• Recent renovations or additions

For a sense of how much roof work alone can cost, see our guide to roof replacement cost.

The 80% rule and underinsurance

Many policies include a coinsurance-style provision: to receive full replacement cost on a partial loss, your dwelling limit must be at least 80% of the home's replacement cost. Fall short and the insurer may reduce your payout in proportion to the shortfall.

Endorsements that protect your dwelling limit

Even a well-set limit can fall short after a regional disaster, when material and labor prices jump. These endorsements help:

• Extended replacement cost: Pays a set percentage above your dwelling limit, commonly 25% or 50%, if rebuilding costs more than expected.
• Guaranteed replacement cost: Pays the full cost to rebuild regardless of the limit. It is less widely available.
• Ordinance or law: Pays for upgrades that current building codes require when you rebuild, such as new electrical standards or wind-resistant construction, which standard policies may not fully cover.
• Inflation guard: Automatically raises your limit each year to track construction cost trends.

Also confirm that the dwelling is settled on a replacement cost basis rather than actual cash value; our guide to replacement cost vs actual cash value explains why that choice matters.

Common mistakes when setting dwelling coverage

Several errors come up again and again:

• Using the purchase price. It includes land and market conditions and can be badly off in either direction.
• Accepting the default estimate without checking. A missing bathroom, wrong square footage or understated finish quality can lower the limit by tens of thousands of dollars.
• Forgetting renovations. A remodeled kitchen or finished basement raises rebuild cost, but insurers only know about it if you tell them.
• Ignoring code upgrades. Older homes may need significant changes to meet current building codes, which is where ordinance or law coverage matters.
• Counting on the land to cover the gap. You cannot sell the lot to pay for rebuilding if you plan to stay.

Avoiding these mistakes is usually a matter of reviewing the estimate once a year and updating the insurer when the house changes.

How dwelling coverage affects your premium

Your dwelling limit is one of the biggest inputs in your premium, and several other limits, including other structures, personal property and loss of use, are often calculated as percentages of it. Raising Coverage A therefore tends to raise the total cost. That is not a reason to underinsure; accurate coverage is worth paying for. If price is a concern, look at your deductible, discounts and bundling instead, as described in how much homeowners insurance costs.

The bottom line

Set your dwelling coverage at the full cost to rebuild your home, not its market value or loan balance. Check the insurer's estimate against local construction costs, adjust for custom features and add extended replacement cost and ordinance or law coverage for a cushion. Revisit the number every year and after any renovation.