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San Rafael, CA Environmental Rules: Flood Zones (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

FEMA flood zone rules in San Rafael, CA, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.

Key Facts

Permit required: Before construction in flood hazard area
Administered by: City public works director
Violation: Misdemeanor citywide
Maps adopted: FEMA FIRM effective August 15, 2017

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in San Rafael, CA.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up San Rafael, CA on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

San Rafael requires a floodplain development permit before any construction begins within FEMA-mapped special flood hazard areas, covering the Canal district and other low-lying neighborhoods under Marin County's 2017 flood insurance maps.

A floodplain development permit shall be obtained before any construction or other development begins within any area of special flood hazard established in Section 18.30.020. Application for a floodplain development permit shall be made on forms furnished by the floodplain administrator and may include, but not be limited to: plans in duplicate drawn to scale showing the nature, location, dimensions, and elevation of the area in question; existing or proposed structures, fill, storage of materials, drainage facilities; and the location of the foregoing. Specifically, the following information is required:

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 37).

Full Breakdown

San Rafael's Public Works Director serves as floodplain administrator and must issue a floodplain development permit before any construction, fill, grading, or other development in an area of special flood hazard, as mapped on Marin County's FEMA Flood Insurance Rate Maps effective August 15, 2017. Applicants submit site plans showing elevations, proposed floor heights, and drainage. This applies only inside San Rafael's city limits: unincorporated Marin County neighborhoods like Santa Venetia or Bayside Acres fall under Marin County's own floodplain rules, not this city ordinance. Building without a permit is a misdemeanor.

Violations & Fines

Constructing, filling, or developing in a mapped flood hazard area without a floodplain development permit is a misdemeanor under SRMC § 18.30.030, and the city may take further lawful action to prevent or remedy the violation.

Frequently Asked Questions

Does this apply outside San Rafael city limits?

No. This permit rule applies only within San Rafael's city limits; unincorporated Marin County flood zones are regulated separately by Marin County, not the city.

What triggers the permit requirement?

Any construction, fill, grading, or other development within a FEMA-mapped special flood hazard area inside San Rafael requires a floodplain development permit from the public works director before work begins.

Sources & Official References

[1]San Rafael Municipal Code — Title 18, Protection of Flood Hazard Areas

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All San Rafael rules

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