Once you receive the community’ s letter stating that the cost to repair flood damage to your building is 50 percent or more of its market value, you may file an ICC claim. You should contact your flood adjuster or your flood insurer’ s claims representative to file the ICC claim. You have 4 years from the date of the community’ s letter declaring the building to be substantially damaged to complete your chosen mitigation activity under the terms of the Standard Flood Insurance Policy . Your flood insurer will provide you with additional information to assist you in completing your ICC claim