Palm Desert, CA Environmental Rules: Flood Zones (2026)
FEMA flood zone rules in Palm Desert, 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
- Development permit before any construction in a special flood hazard area
- Floodplain administrator
- Director of public works or designated representative
- Map basis
- FIS dated October 1979; maps dated April 15, 1980
- Floodway
- No encroachment without engineer's no-rise certification
- Penalty
- Misdemeanor under § 28.06.030
- Appeals
- City council decides appeals under § 28.08.040
Summary
In the City of Palm Desert, no one can begin construction or other development inside an area of special flood hazard without first obtaining a development permit from the floodplain administrator, who is the director of public works or a designee. The areas come from the October 1979 Flood Insurance Study and the April 15, 1980 maps, with later amendments. A violation is a misdemeanor.
§ 28.08.010. Establishment of development permit. A development permit shall be obtained before any construction or other development begins within any area of special flood hazard established in Section 28.06.020. Application for a 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. A. Site plan, including, but not limited to: 1. For all proposed structures, spot ground elevations at building corners and twenty-foot or smaller intervals along the foundation footprint, or one foot contour elevations throughout the building site; and 2. Proposed locations of water supply, sanitary sewer, and utilities; and 3. If available, the base flood elevation from the Flood Insurance Study and/or Flood Insurance Rate Map; and 4. If applicable, the location of the regulatory floodway; and
Full Breakdown
Title 28 of the Palm Desert Municipal Code, Flood Damage Prevention, applies to all areas of special flood hazards within the jurisdiction of Palm Desert (§ 28.06.010). Those areas are the ones identified by the Federal Emergency Management Agency in the Flood Insurance Study dated October 1979 and the Flood Insurance Rate Maps and Flood Boundary and Floodway Maps dated April 15, 1980, plus all subsequent amendments and revisions. The study and maps are on file at the public works department, Palm Desert Civic Center, 73-510 Fred Waring Drive (§ 28.06.020). A special flood hazard area is land with a one percent or greater chance of flooding in any given year, shown on the maps as Zone A, AO, A1-A30, AE, A99 or AH.
Nothing starts without a development permit under § 28.08.010. The application goes to the floodplain administrator, the director of public works or a designee (§ 28.08.020). It must include a site plan with the base flood elevation if available and the regulatory floodway if applicable, plus foundation details such as the proposed lowest floor elevation and, for foundations placed on fill, the location and height of fill, compacted to ninety-five percent using the Standard Proctor Test method. The administrator confirms the site is reasonably safe from flooding and, where base flood elevations exist without a designated floodway, that the cumulative effect of the development does not raise the base flood water surface elevation more than one foot at any point (§ 28.08.030).
Inside the zone, § 28.10.010 requires new construction and substantial improvements to be anchored, built with flood resistant materials, and, for fully enclosed areas below the lowest floor, to have a minimum of two openings totaling not less than one square inch for every square foot of enclosed area, with the bottom of all openings no higher than one foot above grade. Floodways are stricter: § 28.10.060 prohibits encroachments, including fill and new construction, unless a registered professional engineer certifies no increase in the base flood elevation. Recreational vehicles in Zones A1-30, AH and AE must stay fewer than one hundred eighty consecutive days or meet the permit and elevation rules (§ 28.10.050). A substantial improvement is work costing fifty percent or more of the structure's market value.
Violations & Fines
Under § 28.06.030, no structure or land can be constructed, located, extended, converted or altered without full compliance with Title 28, and a violation, including a violation of conditions and safeguards attached to approval, is a misdemeanor. The city council can take any lawful action necessary to prevent or remedy a violation. A structure or development without the required elevation certificate or other evidence of compliance is presumed to be in violation until the documentation is provided. The city council hears appeals of floodplain administrator decisions (§ 28.08.040).
Frequently Asked Questions
Where are the City of Palm Desert's flood maps kept?
Can I build in a floodway in Palm Desert?
What if the mapped boundary does not match my lot?
Who hears appeals of flood permit decisions in Palm Desert?
Sources & Official References
Other rules in Palm Desert
California rules heatmap·Compare Palm Desert to another location·View the California environmental rules overview
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Flood Zones in Nearby Cities
How other cities in Riverside County handle flood zones.