Jackson County, GA Environmental Rules: Flood Elevation Requirements (2026)

Jackson County's flood damage prevention program, Article 10 of the Unified Development Code, is built on the Federal Emergency Management Agency's Flood Insurance Study and Flood Insurance Rate Maps for the county, effective December 17, 2010, kept on file at the Department of Public Development at 67 Athens Street in Jefferson. Section 1011 requires a flood area permit, separate from or alongside a building permit, before any development activity begins in a mapped special flood hazard area. Section 1023 sets the county's core numeric standard: where base flood elevation data exist, new construction and substantial improvements must have the lowest floor, including any basement, elevated no lower than two feet above the base flood elevation, and heating, air conditioning, electrical, and other service equipment must sit at or above that same two-foot freeboard.

Builders who elevate on solid perimeter walls must add flood openings sized under Section 1022, at least one square inch of opening per square foot of enclosed area, with the lowest opening no higher than one foot above grade. Section 1024 lets non-residential structures substitute flood-proofing for elevation, but only if a registered engineer or architect certifies the structure is watertight to two feet above base flood elevation. Section 1025 applies the same two-foot freeboard to manufactured homes, or alternatively lets the chassis be elevated on piers at least 36 inches above grade.

Section 1014 requires an as-built elevation or flood-proofing certification immediately after the lowest floor is finished, and any work done before that certification is submitted is at the permit holder's own risk. Inside the mapped floodway itself, Section 1027 bars new fill, construction, or substantial improvement outright unless an engineer certifies it will not raise flood levels.