The insured has a property policy on his cottage with a $120,000 limit of insurance.

Under a typical property policy, detached private structures such as a boathouse may be covered up to a stated percentage of the dwelling or cottage limit. Here, 10 percent of the $120,000 cottage limit equals $12,000. The key point is that this amount is included within the overall cottage limit rather than automatically added on top of it. Option A is incorrect because boathouses are not necessarily excluded merely because they are separate structures, though eligibility depends on wording, location, and use. Option C is wrong because it treats the detached-structure amount as additional insurance, which is not the typical treatment reflected in this question. Option D is incorrect because the full $120,000 limit applies to the cottage building, not automatically to the boathouse. Brokers must explain detached-structure limits carefully, especially for cottages, garages, sheds, docks, boathouses, and other secondary structures, because clients often assume every structure is insured for full replacement cost. References/topics: Property Insurance—Wordings; detached private structures, cottage insurance, boathouse coverage, policy limits.