Seattle Floodplain Development Regulations
New interim Floodplain Development Regulations and floodplain maps will take effect on August 23, 2020. The City of Seattle is required by FEMA to update our floodplain maps based on their new maps dated August 19, 2020. As part of this update, Seattle is also required to update SMC 25.06, which is Seattle’s Floodplain Development Regulations. These interim regulations will be effective for approximately six months while SDCI works on permanent regulations.



