Extended replacement cost

Extended replacement cost is extra dwelling coverage that sits on top of your Coverage A limit. If a covered loss costs more to rebuild than the limit, the insurer pays up to a stated percentage above it; Triple-I puts the usual range at 5 to 25 percent, and some insurers offer 50% or more. Say your dwelling limit is $400,000 and you have a 25% extension. If rebuilding truly costs $470,000, the policy pays it. If rebuilding costs $540,000, the policy stops at $500,000 and you cover the rest. The extension is a cap, not a promise.

Some policies include a standard extension and others sell it as an endorsement. ISO's HO 04 20, which adds a specified additional amount of Coverage A, works on a similar idea, and insurers' own forms vary. Conditions usually apply. You generally must insure the home to 100% of the insurer's rebuild estimate, report additions and remodels, and rebuild on the same lot.

The extension is meant to absorb surprises, such as construction costs that outrun your limit or the price spike after a regional disaster. It does not repair a limit set too low, and a large storm can use it up. Review your limit yearly. Compare it with guaranteed replacement cost, read extended and guaranteed replacement cost coverage for the trade-offs, and check the base limit against a fresh replacement cost estimate.