Peoria, AZ Environmental Rules: Flood Zones (2026)
FEMA flood zone rules in Peoria, AZ, 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
- Development Permit before any SFHA construction
- Elevation standard
- Lowest floor at/above regulatory flood elevation
- Flood opening size
- 1 sq in per sq ft of enclosed area
- Large subdivision trigger
- BFE data required over 50 lots/5 acres
- Criminal penalty
- Class 2 misdemeanor per violation
- Governing map
- FEMA FIS/FIRM for Maricopa County, 10-16-2013
Summary
Peoria requires a Development Permit from the Floodplain Administrator before any construction, fill, or manufactured home placement in a Special Flood Hazard Area, with the lowest floor elevated to or above the regulatory flood elevation. Violations are a class 2 misdemeanor plus civil penalties.
A Development Permit shall be obtained before construction or development begins, including placement of manufactured homes, within any area of special flood hazard established in Section 20-207... A. Proposed elevation in relation to mean sea level of the lowest floor (including basement) of all structures.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-9: Supplement contains: LLocal legislation current through Ord. 2026-15, passed 6-16-26).
Full Breakdown
Under City Code Sec. 20-206, the floodplain chapter applies to all areas of Special Flood Hazard within Peoria's corporate limits, mapped on the FEMA Flood Insurance Study and FIRM panels for Maricopa County dated October 16, 2013 (Sec. 20-207). Before any development, including placement of manufactured homes, a Development Permit must be obtained from the Floodplain Administrator (Sec. 20-222); the application must show the proposed elevation of the lowest floor relative to mean sea level, and for subdivisions over 50 lots or 5 acres, base flood elevation data is required.
Sec. 20-230 sets the construction standards: residential structures in Zones AE, AH and A1-30 must have the lowest floor elevated to or above the regulatory flood elevation, and in Zone AO either to the regulatory elevation or at least two feet above the highest adjacent grade. Enclosed areas below the lowest floor used only for parking, access or storage must have flood openings totaling at least one square inch per square foot of enclosed area, with the bottom of openings no higher than one foot above grade.
Nonresidential buildings may instead be floodproofed to be watertight below the required elevation, certified by a registered engineer or architect. Sand and gravel operations within the floodway or floodplain require a separate permit from the Engineering Director (Sec. 20-223). The Floodplain Board, chaired by the City Manager or designee, hears appeals and variance requests (Sec. 20-241).
Violations & Fines
Engaging in development or diverting, retarding or obstructing a watercourse without the written authorization required by A.R.S. § 48-3613 is a class 2 misdemeanor under Sec. 20-213(B). A civil penalty up to the maximum fine chargeable for a class 2 misdemeanor may also be assessed under A.R.S. § 48-3615, and each day a violation continues is a separate violation. Anyone who damages a flood-control facility without authorization is liable for actual damages plus the City's remediation costs. The Floodplain Administrator must report a discovered violation to the Floodplain Board within 30 days, and the Board must act, issue a variance, or order more information within 30 days of receiving that report.
Frequently Asked Questions
Do I need a permit to build in a Peoria floodplain?
How high must my home's lowest floor sit above flood level?
What happens if I build in the floodplain without authorization?
Sources & Official References
Other rules in Peoria
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Flood Zones in Nearby Cities
How other cities in Maricopa County handle flood zones.