Floodplain Management

Floodplain Management

As of 12/21/2018, FEMA updated local flood zones following a coastal study.
Compare new and old flood zones in the City, and view the properties affected.

Interactive map
Compare FEMA Flood Zones

National Flood Insurance Program

The City of San Leandro is a member of the National Flood Insurance Program, which is administered by the Federal Emergency Management Agency (FEMA).

FEMA has delineated portions of the City as special flood hazard areas on flood insurance rate maps. Membership in the program allows residents in these special flood hazard areas of the City to obtain federally backed mortgages and disaster assistance in the event of flooding. As part of this program, properties within these areas may be subject to special flood insurance requirements and requires new construction, additions and remodels of existing buildings in designated flood zones to conform to rules that minimize flood damage. 

The current Flood Insurance Rate Map (FIRM) for the City of San Leandro was issued on December 21, 2018.  These maps may be viewed at FEMA Map by entering a street address and clicking "View."

Community Rating System

In October 2006, FEMA accepted the City into the Community Rating System (CRS) with a rating of Class 8. The rating provides owners of property in special flood hazard areas up to 5%- 10% reductions in premiums for flood insurance required under the National Flood Insurance Program. Property owners should contact their policy holder and review their policy to make sure they are getting the discount.

Flood Maps, Elevation Certificates, and Other Documents

As a community participating in the National Flood Insurance Program, the City of San Leandro is the repository for flood maps, letters of map revision (LOMR), letters of map amendments (LOMA) and elevation certificates. These documents are available at the Division of Building & Safety at 835 E. 14th Street. FEMA Flood maps and other FEMA related literature may be found at the City's Main Library located at 300 Estudillo Avenue.

If you have questions regarding flood zone information for your property, please contact the Division of Building & Safety's -  Flood Information Line at (510) 577-3416 or email us at mjeffery@sanleandro.org and provide the following information:

  • The property street address that you are inquiring about
  • The Assessor's Parcel Number (APN), Subdivision, Lot and Block Numbers, if available.
  • The nearest cross street
  • Your contact information:
    • Full Name
    • Affiliation
    • Mailing Address
    • Telephone Number
    • Email Address


  • If you are anticipating doing any construction, and are in a Flood zone,, you may be required to fill out a Substantial Improvement Worksheet, which can be found here: 

If you are in  or near a special flood hazard area, are you prepared for a flood?

If your property is located in or near a special flood hazard area, please take a look at our Flood Safety Brochure.  In this brochure, you will find relevant information for San Leandro residents such as: FEMA Substantial Improvement Worksheet

  • What to do before, during and after a flood?
  • How to protect your property from the hazards of flooding
  • How to report obstructed or illegal dumping in the City's drainage system
  • What station to tune-in to during a storm

Construction in Flood Zones - Substantial Improvement/Damage

If your home or business is below the 100-year flood elevation, the City of San Leandro has flood damage prevention regulations that may affect how you remodel, renovate, or add on to your building. If your home or business sustained structural and/or interior damage, these regulations may affect how you rebuild. The National Flood Insurance Program (NFIP) requires these regulations be adhered to in order to protect you and your property from future flood damage. The City must adopt and enforce flood protection laws in order for federally backed flood insurance to be made available to community residents and property owners.  Information about Substantial Improvement and Substantial Damage can be found in FEMA UNIT 8.

  • Substantial Damage means damage of any origin sustained by a structure whereby the cost of restoring the structure to its "before damage" condition would equal or exceed 50 percent of the market value or replacement cost of the structure before the damage occurred.
    [NOTE: The cost of the repairs must include all costs necessary to repair the structure to its "before damage" condition.]
  • Substantial Improvement means any reconstruction, rehabilitation, addition or other improvement of a structure, the cost of which equals or exceeds 50 percent of the market value of the structure before the "start of construction" of the improvement.

If a building is "substantially damaged" or "substantially improved" it must be brought into compliance with City of San Leandro's damage prevention regulations, including elevating the building to or above the 100-year flood elevation.

For additional questions about permits and construction in the flood zone, please contact the Division of Building & Safety at (510) 577-3420.

Frequently Asked Questions (FAQ)

FAQ for Homeowners  

FAQ Flood Zones    

FAQ about the National Flood Insurance Program(NFIP)  

FAQ Flood Hazard Mapping            

Recommended FEMA Web Pages and Sites