Walker County, GA Environmental Rules: Flood Elevation Requirements (2026)
Key Facts
- Non-residential elevation option
- Lowest floor 1 ft above base flood elevation
- Floodproofing alternative
- A zones only, watertight below BFE
- Certification required
- Registered professional engineer or architect
- Structural standard
- Resist hydrostatic and hydrodynamic loads
- Approved by
- Walker County Planning Director
Summary
Commercial and industrial buildings in a mapped Walker County flood hazard area must, under Sec. 22-361(b)(2), have their lowest floor at least 1 foot above the base flood elevation, or be fully floodproofed to that level and certified watertight by a registered engineer or architect.
(2)Non-residential construction. New construction or substantial improvement of any commercial, industrial or non-residential structure shall have the lowest floor, including basement, elevated no lower than 1 foot above the level of the base flood elevation. Structures located in all A zones may be floodproofed in lieu of being elevated, provided that all areas of the structure below the required elevation are watertight, with walls substantially impermeable to the passage of water, and use structural components having the capability of resisting hydrostatic and hydrodynamic loads and the effects of buoyancy. A registered professional engineer or architect shall certify that the standards of this subsection are satisfied.
Full Breakdown
Walker County Code § 22-361(b)(2) gives commercial, industrial and other non-residential buildings in an Area of Special Flood Hazard two paths to compliance. The first mirrors the residential standard: elevate the lowest floor, including any basement, to at least 1 foot above the base flood elevation (BFE). The second lets the owner floodproof the structure instead of raising it, but only for buildings in an A zone, and only if every wall below the required elevation is watertight and substantially impermeable to water, with structural components able to resist the hydrostatic and hydrodynamic loads and buoyancy forces floodwater creates.
Either way, the ordinance does not accept a contractor's word for it: a registered professional engineer or architect must certify that the design meets these standards, and that certification has to be filed with the Planning Director before the county will sign off. This floodproofing option matters most for existing commercial buildings on already-developed sites in the mapped flood hazard areas along Walker County's creeks, where elevating an entire building on fill or piers is often impractical; floodproofing lets an owner harden the building in place instead.
The same base flood elevation data used for the residential rule in subsection (b)(1) applies here, so a single site survey determines the target elevation for both a house and a store built on the same flood-hazard parcel.
Violations & Fines
A non-residential building constructed or substantially improved in a mapped flood hazard area without meeting the 1-foot freeboard elevation, or without a licensed engineer's or architect's certification that floodproofing meets the watertight and structural-load standards of Section 22-361(b)(2), is out of compliance with the county's flood damage prevention ordinance and can be held up from final approval until corrected.
Frequently Asked Questions
Can a commercial building be floodproofed instead of elevated in Walker County?
How much freeboard does Walker County require above base flood elevation?
Who certifies that a floodproofed building meets Walker County's standard?
Does the same flood elevation data apply to homes and businesses in Walker County?
Sources & Official References
Other rules in Walker County
Compare Walker County to another location·View the Georgia environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.