Santa Rosa, CA Environmental Rules: Flood Zones (2026)

010 to comply with the National Flood Disaster Protection Act and the National Flood Insurance Program Regulation, applying to all areas of special flood hazard within city jurisdiction. Those areas are defined by FEMA's Flood Insurance Study for Sonoma County and incorporated areas, dated effective December 2, 2008, together with the accompanying Flood Insurance Rate Maps and Flood Boundary and Floodway Maps, all adopted by reference and kept on file at Planning and Economic Development, City Hall Room 3, 100 Santa Rosa Avenue. 030 sets the compliance trigger: no structure or land may be constructed, located, extended, converted, or altered without full compliance with the chapter, and violations are punishable as an infraction with a $100 fine.

050 requires a development permit before construction or development begins in a mapped hazard area, with applications showing the nature, location, dimensions, and elevations of the site, existing or proposed structures, fill, and drainage facilities, plus the proposed elevation of the lowest floor relative to mean sea level. 070.