FEMA flood zone rules in Silverdale, WA — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Washington requires all communities participating in the National Flood Insurance Program to adopt floodplain ordinances meeting state minimum standards under RCW 86.16.
RCW 86.16 grants the Department of Ecology authority to regulate floodplain development statewide. All Washington counties and cities with mapped flood hazard areas must adopt floodplain management ordinances meeting NFIP and state minimum standards, including elevation of new structures one foot above the base flood elevation (BFE), prohibition of fill in floodways, and special review for critical facilities. RCW 86.16.041 authorizes Ecology to review and approve local floodplain ordinances. The 2017 update extended Endangered Species Act consistency requirements for floodplain development affecting salmon habitat. Local jurisdictions may impose stricter standards.
Building or filling in regulated floodways without permits can result in civil penalties, mandatory removal, loss of NFIP eligibility for the community, and personal liability for damage to neighboring properties.
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See how Silverdale's flood zones rules stack up against other locations.
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