Clovis, CA Environmental Rules: Flood Elevation Requirements (2026)

05(a) sets the construction standards that apply to all new buildings and substantial improvements within a mapped special flood hazard area in Clovis. 02(j) as the elevation of the one-percent-annual-chance flood plus wave height, relative to the applicable federal or state datum shown on the Flood Insurance Rate Map. Nonresidential buildings get an alternative under subsection (a)(3)(ii): instead of elevating to the residential standard, they may be dry-floodproofed below that elevation so the structure and its utilities and sanitary facilities stay watertight, with structural components engineered to resist hydrostatic and hydrodynamic loads and the effects of buoyancy, but only if a registered civil engineer or architect certifies the standard is met and files that certification with the Floodplain Administrator.

Subsection (a)(3)(iii) separately requires enclosed areas below the lowest floor used for parking, access, or storage to have flood openings, at least two on different walls, sized to at least one square inch per square foot of enclosed area, with the lowest opening no higher than one foot above grade. Manufactured homes get their own elevation rule under subsection (d): the lowest floor must reach the CBC/CRC elevation, or the chassis must sit on reinforced piers at least 36 inches above grade in an existing park.