How To Determine Substantial Improvement According to FEMA's 50% Rule
Substantial Improvement is defined as any reconstruction, rehabilitation, addition, or other improvement of a structure, the cost of which equals or exceeds 50 percent of the market value of the structure before the "start of construction" of the improvement. This term includes structures which have incurred "substantial damage," regardless of the actual repair work performed.
Projects that are considered substantial improvement must meet current Florida Building Code, 6th Ed. (2017), as well as the provisions of the Collier County Flood Damage Prevention Ordinance.
Learn more from FEMA's Answers to Questions About Substantially Improved/Substantially Damaged Buildings brochure, dated August 2018 (published November 2, 2018).
The forms below are required to be submitted when the scope of work for a building permit includes reconstruction, rehabilitation, addition, or other improvement to the structure. These forms will assist in the determination of whether the scope of work will be a substantial improvement or repair of substantial damage.
Main Campus: 2800 North Horseshoe Drive, Naples, FL 34104
Phone: (239) 252-2400