For permanent work, FEMA estimates the cost to restore the facility to its pre-disaster design and function, including eligible codes and standards and a reasonable amount for soft costs, but nothing that is only triggered by changing the design or function. Emergency response work is harder to estimate, and FEMA funds it on an estimate only if you provide enough information.
For emergency work: enough detail on planned activities, durations and resources for FEMA to accept an estimate. For permanent work: the agreed damage description, the method of repair, the codes and standards that apply, and any engineering analysis needed to choose the repair method.
Soft costs such as design and environmental compliance are part of the estimate, so ask for them. If the repair method isn’t clear, request engineering and design funding up front rather than accepting a guessed scope.