Clinton Township, MI Environmental Rules: Flood Elevation Requirements (2026)

03 for work in a flood hazard area. Subsection (c) is the freeboard rule: new construction or substantial improvements must be built using methods and practices that minimize flood damage, and the lowest floor, including any basement, must be elevated to at least one foot above the 100-year flood elevation, giving a built-in safety margin above the mapped base flood level rather than building to it exactly. Subsection (h) adds a further check for the regulatory floodway specifically, prohibiting construction, substantial improvements, and encroachments, including fill, unless a registered professional engineer certifies that the development will not cause any increase in the 100-year flood elevation.

08, which bars any variance that would raise the flood level during a base flood discharge. 05(b)(13) whenever the project falls under the state Subdivision Control Act or exceeds five acres, giving the Planning Commission the elevation figures needed to confirm compliance with the one-foot freeboard standard before a permit issues.