Glenn County, CA Environmental Rules: Flood Zones (2026)
FEMA flood zone rules in Glenn County, CA, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.
Key Facts
- Governing chapter
- Glenn County Code Ch. 15.54
- FEMA study adopted
- FIS effective 6/5/1997
- Enforcing official
- Building Official (flood plain administrator)
- Permit required
- Before any development in a flood hazard area
- Appeal body
- Board of Supervisors
- Violation
- Misdemeanor
Summary
In unincorporated Glenn County, no one may build, fill, or alter land within a mapped area of special flood hazard without a development permit from the county's flood plain administrator. The county adopted FEMA's 1997 Flood Insurance Study and Flood Insurance Rate Maps to draw those zones, and the Glenn County Building Official issues or denies every permit under Glenn County Code Chapter 15.54.
A development permit shall be obtained before any construction or other development begins within any area of special flood hazard established in Section 15.54.040. Application for a development permit shall be made on forms furnished by the flood plain 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.
Full Breakdown
040. That section adopts the Flood Insurance Study for Glenn County effective June 5, 1997, along with the accompanying Flood Insurance Rate Maps and Flood Boundary and Floodway Maps effective September 3, 1980, plus all later amendments, as the official basis for the flood zone boundaries. Permit applications go to the flood plain administrator on county forms and must include a site plan with spot elevations, foundation design detail, the proposed elevation of the lowest floor in relation to mean sea level, and a description of any watercourse alteration.
090 for reviewing every permit, confirming other state and federal permits are in hand, and determining that a site is reasonably safe from flooding. 050 makes the chapter apply to all areas of special flood hazard within Glenn County's jurisdiction, meaning unincorporated land only; Willows and Orland administer their own floodplain rules inside city limits. 170 sends broader appeals of the administrator's decisions to the Board of Supervisors. 180 but are, in the code's own words, intended to be rare because of the compelling need to protect residents from flood risk.
Violations & Fines
Section 15.54.060 makes it unlawful to construct, locate, extend, convert, or alter any structure or land without full compliance with Chapter 15.54, and states plainly that violating these requirements, including any condition or safeguard attached to a permit, shall constitute a misdemeanor. The code also preserves the county's right to take any other lawful action needed to prevent or remedy a violation, on top of criminal prosecution.
Frequently Asked Questions
Do I need a permit to build in a Glenn County flood zone?
Who decides where Glenn County's flood zones are?
What happens if I build in a flood hazard area without a permit?
Can I appeal a flood plain administrator's decision?
Sources & Official References
Other rules in Glenn County
California rules heatmap·Compare Glenn County to another location·View the California environmental rules overview
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