Which of the following is required for a house built over a floodable garage?

When a house is constructed over a floodable garage, a non-conversion certification is required. This certification is designed to ensure that the area above the flood-prone garage is not converted into living space or any other type of habitable space that would undermine flood safety regulations. The purpose of the certification is to maintain the integrity of floodplain management practices by preventing the risk associated with placing people in areas that could be subject to flooding.

The idea is that the space occupied by the garage must remain open and free from any conversion that would make it a living area, potentially endangering occupants during flood events. This requirement is especially important to comply with the National Flood Insurance Program (NFIP) regulations, which aim to minimize risks to life and property in flood-prone areas.

Other options like a floodplain management strategy document, site and/or building plans, and a land-use compatibility analysis do not specifically address the need for preventing the conversion of garage space into living areas in the context of NFIP requirements. Instead, they may pertain to broader planning measures or structural considerations that do not directly relate to the maintenance of space intended to remain non-habitable due to flood risk.