FEMA flood zone rules in Maricopa County, AZ — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
The Flood Control District of Maricopa County (FCDMC) manages floodplain regulations for unincorporated areas and 14 municipalities. Development in FEMA-designated Special Flood Hazard Areas requires a Floodplain Use Permit. Desert flash flooding along washes and arroyos is the primary flood risk. Building in or near washes requires flood control approval. The county participates in the National Flood Insurance Program (NFIP).
FCDMC enforces floodplain regulations under authority from ARS 48-3601+. Floodplain Use Permits are required for construction, grading, or filling in Special Flood Hazard Areas. Finished floor elevations must be elevated above the base flood elevation. Drainage plans must address on-site and off-site stormwater capture and conveyance. Building permits in flood-prone areas require FCDMC review and approval.
Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact Maricopa County code enforcement directly for current fines, enforcement procedures, and hearing options.
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See how Maricopa County's flood zones rules stack up against other locations.
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