Dwelling Coverage

Dwelling coverage is the section of a homeowners or dwelling policy that pays for physical damage to the insured house itself. Texas's insurance regulator puts it in one line: dwelling coverage "pays if your house is damaged or destroyed by something your policy covers." The National Association of Insurance Commissioners labels the same item "Damage to House" on its consumer material and describes the face amount as the most the policyholder will receive if the house is totally destroyed. Nebraska's insurance department draws the boundary more precisely: the coverage pays for damage to the house and to structures attached to it, including plumbing, electrical wiring, heating systems and permanently installed air conditioning.

The naming varies by who is writing, and no single official form of words exists. Regulators variously call it dwelling coverage, damage to house, or simply the dwelling. What they agree on is the boundary: attached is dwelling, detached is the separate other-structures coverage, which Nebraska's department describes as covering fences, tool sheds, freestanding garages and similar structures on the property.

The derived-percentage structure is the reason this number matters more than its own coverage. NAIC states the mechanism plainly: most of the coverages in a homeowners policy are a flat percentage of the amount of insurance on the home itself, giving contents at 50% of the dwelling amount as its illustration, so a home insured for $100,000 carries $50,000 of contents coverage. Wisconsin's insurance regulator publishes a fuller version of the same table, worked through for the broad form it labels Homeowners Form 2: detached structures at 10% of the dwelling amount, unscheduled personal property on the premises at 50%, unscheduled personal property away from the premises at 10% of the personal property limit, and additional living expenses at 20%, alongside flat limits for personal liability and medical payments that do not derive from the dwelling figure. It also notes that trees, plants and shrubs are typically covered at 5% of the insurance on the house, subject to a per-item cap.

The percentages themselves are not uniform, and it is worth being precise about that rather than quoting one and implying it is national. Texas's regulator illustrates personal property at 20% of the dwelling limit, and additional living expenses as possibly limited to 10 to 20% of the dwelling amount. Those are examples of what particular policies do, under different state forms, not a rule. The rule is the structure: several other limits are computed from the dwelling limit, so they all move together when it moves.

Which is why the commonest error here is expensive in four places at once. A dwelling limit set from the mortgage balance, or from what the house would sell for, is not set from what rebuilding would cost. Wisconsin's regulator addresses the confusion directly: do not confuse replacement cost with market value, because market value is a real estate term describing what the home would fetch if sold, including the price of the land. Land is not damaged by a fire and does not need rebuilding. A dwelling limit anchored to a figure that includes it, or to a loan balance that has nothing to do with construction costs, understates the dwelling coverage and, through the percentages above, understates the contents, the detached structures and the living-expense coverage in the same stroke.

The peril basis differs between the structure and its contents, and almost nobody is told this. Texas's regulator sets out the two policy types: all-risk policies, also called open perils, cover any event the policy does not specifically exclude, while named perils policies cover only the events listed in the policy. Wisconsin's regulator then describes what the common special form actually does with them: the Special Form, designated HO-3, insures the dwelling and detached structures against loss or damage from any peril except those specifically listed as excluded, and provides coverage for damage to personal property caused by any of the perils covered by the broad form, which is a named list. So on that form the house is covered on an open-peril basis and the contents on a named-peril basis, and an endorsement is available at extra premium to broaden the contents side. A loss to the building from an unusual cause is therefore covered unless the policy excludes it, while the same cause acting on the furniture is covered only if the cause is on the list.

What this page does not decide. How much of the rebuilding cost you must insure in order to be paid on a replacement cost basis, commonly expressed as the 80% requirement, and how replacement cost is actually paid out, are set out in full on the homeowners insurance page with a worked example. The choice between replacement cost and actual cash value has its own pages. Flood and earthquake are excluded from the dwelling coverage and bought separately, which those pages cover. This page is about what the dwelling number covers and what it drives.

The dwelling limit is set at purchase from an estimate of what it would cost to rebuild the house at current construction prices. The insurer then computes the other limits as percentages of it, according to the form. After a covered loss to the structure the insurer applies the deductible, values the damage on the policy's settlement basis, and pays up to the dwelling limit.

A hypothetical, to show how one number moves four. Suppose a policy carries a dwelling limit of $400,000 and derives other structures at 10%, personal property at 50% and additional living expenses at 20%. Other structures are therefore insured for $40,000, personal property for $200,000, and additional living expenses for $80,000. Now suppose a rebuilding estimate comes in at $460,000 and the owner raises the dwelling limit to match. Other structures become $46,000, personal property $230,000, and additional living expenses $92,000. A single $60,000 increase in one limit added $6,000, $30,000 and $12,000 to three others, for $108,000 of additional coverage in total. The percentages are the ones Wisconsin's insurance regulator publishes for its homeowners form and the dollar amounts are invented; a specific policy's percentages are on its declarations page.

Run it in the other direction and the same arithmetic is the warning. A house that would cost $460,000 to rebuild, insured for $400,000 because that was the mortgage balance, is short $60,000 on the structure and short $48,000 across the three derived coverages. None of that shortfall is visible on the policy or in the premium. It becomes visible when a claim is paid.

The maintenance task follows: rebuilding costs move, and a dwelling limit set several years ago against a lower cost of construction drifts below what it should be without anything on the policy changing. Wisconsin's regulator notes that most policies include an inflation guard that raises the limit automatically, and advises checking with the insurer periodically anyway.

Pros

• It covers the largest asset in the policy, and on the common special form it does so against any peril the policy does not specifically exclude.
• Deriving the other limits from it means a household that gets this one number right is roughly right on three others without further work.
• The limit is stated on the declarations page, so it is one of the few things about a policy that can be checked in under a minute.
• Automatic inflation adjustment, where the policy has it, keeps the limit moving with construction costs between reviews.

Cons

• The derived structure cuts both ways: one understated number understates several coverages at once, invisibly.
• Setting it from market value or a mortgage balance is the standard error, and market value includes land that never needs rebuilding.
• On the common special form the contents are covered on a narrower, named-peril basis than the structure, which is a distinction few policyholders are told about.
• Rebuilding costs move faster than most people revisit their policy, so a limit that was right at purchase quietly stops being right.