Lee County Building & Permitting: Flood-Zone Permits and the 50% Rule

Lee County's floodplain staff describe three conditions that together put a project under the 50% rule.

The property is in a FEMA flood zone (an A or V zone, also called the Special Flood Hazard Area). The building is below the required flood elevation. And the work is a repair, remodel, renovation or addition.

The county's own flowchart starts with one question: is the building already flood compliant?

If an elevation certificate shows it already meets the required elevation, the 50% rule generally does not apply and the project goes through standard permit review. If you are not sure, the county suggests looking up the property's elevation certificate first, since many are already on record with DCD.

The county's floodplain administrator estimates the market value of the building before construction starts, or asks the applicant for an appraisal from a qualified independent appraiser.

For storm repairs, the market value is the value before the damage happened. Staff then compare that value with the full cost of the work: the improvements, the cost of restoring any damage to its pre-damage condition, or both combined.

Two details trip up owners. First, the repair estimate must include everything needed to fully restore the building, not only the parts you plan to do now.

Second, the county's ordinance language counts "substantial damage" as substantial improvement no matter how little repair work is actually proposed. If the building was substantially damaged, the flood rules apply to the rebuild.

For years Lee County's local definition of substantial improvement counted the cumulative cost of work over a five-year period (Ordinance 15-09).

After Hurricane Ian, the Board of County Commissioners adopted Ordinance 22-30 on November 8, 2022. It repealed that local amendment and moved to a permit-by-permit comparison for most buildings. The staff report to the Board explains the one exception the county kept: repetitive-loss properties, where the look-back was shortened from five years to one year.

That exception is where the 2025 state law matters in Lee County.

Section 163.31795 now forbids an NFIP community from enforcing any cumulative period at all, and Lee County is an NFIP community. If your building has a repetitive-loss history, ask DCD's floodplain staff in writing whether a one-year look-back still applies to your permit, and keep the answer with your cost estimate. Pineland does not give legal opinions; we raise the question at the start so it is settled before plan review.

The county lists the usual consequences. The structure may need to be elevated.

Mechanical equipment may need to be raised. The plans must show flood compliance, and DCD may ask for extra documentation. Federal NFIP rules require a building over the threshold to be brought fully into compliance with current flood damage prevention rules, and the county must enforce them for federally backed flood insurance to stay available in unincorporated Lee.

The target is the base flood elevation plus one foot of freeboard.

For an older slab-on-grade home that can mean a lift, a rebuild, or a redesign of the addition. That is where structural engineering decides the budget: foundation type, connections to the existing structure, and how the elevated parts handle flood and wind loads together.

Ordinance 22-30 updated the Land Development Code to adopt the Flood Insurance Study for Lee County and Incorporated Areas effective November 17, 2022, replacing the August 28, 2008 study, and revised the elevation rules for manufactured homes in flood hazard areas.

If your survey or elevation certificate predates that map, check the current zone and base flood elevation before design starts. Our free flood zone lookup is a quick first pass, and the county's floodplain pages have the official data.

Most Lee County 50% reviews turn on two documents: the elevation certificate and the cost estimate.

Our work starts with the first one. We read the certificate against the required elevation, decide whether the building is already compliant (which the county's flowchart treats as the end of the question), and only then draw the remodel, addition or storm repair. When the answer is no, the structural and architectural drawings show the flood work explicitly, so DCD sees it on the sheets instead of asking for it in a correction letter.