Sparks, NV Environmental Rules: Flood Elevation Requirements (2026)

0220 sets the elevation standard for the lowest floor of residential construction, tenant improvements, and substantial improvements built anywhere within a mapped special flood hazard area in the city's floodplain along the Truckee River corridor. The base flood elevation for each parcel is fixed using the Flood Insurance Study (FIS) tied to the applicable Flood Insurance Rate Map (FIRM) panel; the code flatly bars interpolating between FIRM panels to estimate a lower number. In Zone AO, the lowest floor must clear the highest adjacent grade by at least one foot more than the depth number printed on the FIRM, or three feet above grade if no depth number is shown.

In Zones A and AE, and in every other special flood hazard zone, the lowest floor must sit at least one foot above the base flood elevation. A tighter rule applies in the stretch of Zone AE bounded by Interstate 80 to the north, Sparks Boulevard to the east, Prater Way to the south and North McCarran Boulevard to the west: there, the lowest floor must reach the base flood elevation itself, with no one-foot cushion. 0130 requires the permit application to state the proposed elevation of the lowest floor relative to mean sea level.

0230 requires a registered professional engineer or surveyor to certify the as-built lowest-floor elevation on FEMA's current Elevation Certificate, which the city building inspector verifies before it is accepted.