Code upgrade is the largest hidden number. Sprinkler standards, corridor widths, door and hardware requirements, fire alarm systems, emergency power, and accessibility have all moved. An older building rebuilt after a serious loss is rebuilt to today rules, and an ordinance or law sublimit set at a token percentage of the building value does not fund that gap.
Water is the loss that actually closes buildings. A supply line failure or a sprinkler head discharge produces modest dollar damage and displaces an entire wing, because wet ceilings, wet carpet and remediation take rooms out of service and residents cannot occupy them meanwhile.
Displacement has a licensure dimension. Residents moved out of a damaged licensed building have to be placed somewhere appropriately licensed, which means negotiating with other operators, transporting residents, and frequently paying more than the revenue those residents generated. Whether that lands in extra expense is a question to answer in advance.
Census recovery lags physical restoration. A building that reopens at seventy percent occupancy is still losing revenue relative to before, and whether the extended period of indemnity covers that gap is a term rather than an assumption.
Generators and chillers are life safety equipment. In heat, a chiller failure endangers residents. Equipment breakdown, load testing records and fuel arrangements are underwriting questions and regulatory ones at once.