California Senate Bill 9 (SB 9) introduces new opportunities for increasing housing density in single-family residential areas. However, flood risk plays a crucial role in determining eligibility.
Definition and Explanation
A flood hazard area subject to inundation by the 1 percent annual chance flood, commonly referred to as the 100-year floodplain, is an area that has a 1% chance of being inundated by flood waters in any given year. These areas are identified by the Federal Emergency Management Agency (FEMA) through Flood Insurance Rate Maps (FIRMs).
How It Applies to SB 9
Properties located within a flood hazard area subject to inundation by the 1 percent annual chance flood are generally ineligible for SB 9 provisions, unless certain flood mitigation measures are met. This restriction aims to prevent increased housing density in areas with significant flood risk.
Determining Eligibility
- Check FEMA's National Flood Hazard Layer (NFHL) Viewer, an online mapping tool that shows flood hazard zones.
- Consult local floodplain management agencies or planning departments for more detailed flood hazard information.
- If the property is in a designated flood hazard area, investigate whether any exceptions apply or if flood mitigation measures have been implemented.
Impact on Property Owners
Property owners outside of designated flood hazard areas have more flexibility to utilize SB 9. Those within the 1 percent annual chance flood zones face restrictions unless they can demonstrate compliance with flood mitigation requirements.
