Taylorsville, UT Environmental Rules: Flood Elevation Requirements (2026)

Section 17.02.070 sets Taylorsville's freeboard standard for flood hazard reduction. For residential construction, subsection B1 requires the lowest floor, including any basement, of new construction and substantial improvements to sit at or above the base flood elevation plus one foot, certified by a registered professional engineer, architect, or land surveyor to the floodplain administrator. Subsection B2 gives nonresidential buildings, meaning commercial, industrial, or other nonresidential structures, a choice: meet that same one-foot freeboard over base flood elevation, or instead design the structure watertight below the base flood level, with walls substantially impermeable to water and components engineered to resist hydrostatic and hydrodynamic loads, certified by a registered engineer or architect and recorded with the floodplain administrator along with the specific elevation to which the building is floodproofed.

The freeboard requirement applies on top of the general construction standards in subsection A, which require anchoring against flotation and lateral movement and flood-resistant materials, and it interacts with the manufactured home and recreational vehicle elevation rules in subsections B4 and B5, which use the unmodified base flood elevation rather than the extra foot of freeboard as their baseline. Subdivisions of more than fifty lots or five acres, whichever is smaller, must generate their own base flood elevation data under subsection C3 if the FIRM does not already supply it.