Edmonds, WA Environmental Rules: Flood Elevation Requirements (2026)

1, requiring that for buildings in all structure categories located in Coastal High Hazard Areas and Coastal A Flood Zones, the lowest floor's elevation be a minimum of two feet above the base flood elevation as determined from the applicable FEMA flood hazard map. 090(A) requires them to be elevated on a permanent foundation so the lowest floor sits at least one foot above base flood elevation and to be securely anchored against flotation, collapse and lateral movement. 010 both reference the National Flood Insurance Program flood hazard designation adopted August 8, 1978, with the current Flood Insurance Study and Flood Insurance Rate Maps dated June 19, 2020.

030(B), any residential or commercial structure in a flood hazard area that is destroyed, damaged or demolished to 50 percent or more of its replacement cost cannot be reconstructed except in full conformance with the chapter's flood provisions and other applicable local, state and federal flood regulations, meaning older structures rebuilt after major damage must meet the current freeboard standards rather than being grandfathered at their prior elevation.