FEMA flood zone rules in Redmond, WA — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Redmond participates in the NFIP and regulates construction in FEMA Special Flood Hazard Areas along Bear Creek, Evans Creek, and the Sammamish River. Critical areas code adds 1-2 ft freeboard.
Redmond is a participating community in the FEMA National Flood Insurance Program and adopts Flood Insurance Rate Maps (FIRMs) for King County. The Sammamish River, Bear Creek, and Evans Creek floodplains through Downtown Redmond, Marymoor Park, and Idylwood are mapped as Special Flood Hazard Areas (Zone AE or A). Under Redmond Municipal Code Title 21 and the flood damage prevention chapter, new or substantially improved structures in the SFHA must have the lowest floor elevated at least 1 to 2 feet above Base Flood Elevation (freeboard), use flood-resistant materials below BFE, and meet anchoring requirements. Substantial improvement is defined as work exceeding 50 percent of the structure's pre-improvement market value over a rolling period. Critical facilities (hospitals, schools, fire stations) have stricter elevation requirements. Elevation Certificates sealed by a licensed surveyor are typically required for permits and for flood insurance rating. Fill in the floodway is strictly limited and requires a no-rise certificate.
Contact your local code enforcement office for specific penalty information.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Redmond, WA
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Redmond, WA
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Redmond, WA
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Redmond, WA
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Redmond, WA
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Side-by-side rule comparisons with other cities in King County.
See how other cities in King County handle flood zones.
See how Redmond's flood zones rules stack up against other locations.
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