Definition:Other structures coverage
📋 Other structures coverage is a standard component of a homeowners insurance policy — typically designated as Coverage B under the ISO HO forms — that protects buildings on the insured premises which are separated from the main dwelling by a clear space. Detached garages, tool sheds, fences, swimming pools, and gazebos are classic examples. The coverage is distinct from Coverage A ( dwelling coverage) because it addresses structures that serve a different function or are physically disconnected from the primary residence.
⚙️ Under most standard homeowners forms, Coverage B is set at 10 percent of the Coverage A limit by default — so a home insured for $400,000 would carry $40,000 in other structures protection. Policyholders with high-value outbuildings, such as a detached guest house or a large barn on a residential estate, can request a higher limit through an endorsement, which the underwriter evaluates separately for construction type, use, and replacement cost. Importantly, structures used for business purposes or rented to non-household members may be excluded or require their own commercial policy, a nuance that agents must communicate clearly to avoid coverage gaps.
🏠 Getting other structures coverage right matters because a gap here can leave a homeowner significantly under-insured after a windstorm, fire, or falling-tree event that damages multiple structures simultaneously. Adjusters must allocate the loss correctly between Coverage A and Coverage B when the dwelling and a detached structure are both damaged in the same occurrence, since each carries its own deductible treatment and limit. As property values and construction costs rise, periodic reviews of the Coverage B limit have become an important part of the policy review process — an area where insurtech tools using aerial imagery and property data analytics can flag under-insurance before a loss ever occurs.
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