FEMA flood zone rules in Green Valley, AZ — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Pima County Regional Flood Control District administers the Floodplain Management Ordinance (Title 16, Ordinance 2010-FC5). The District maps both FEMA FIRMs and local Special Study Floodplains covering more than half of known county flood hazards. FEMA updated Pima County flood maps January 2026 (appeal through April 29, 2026). Building in/near washes requires flood control approval.
The Pima County Regional Flood Control District (201 N Stone Ave, 9th Floor; 520-724-4600) administers the Floodplain Management Ordinance (Title 16, Ord. 2010-FC5) in both unincorporated and incorporated areas (except cities/towns with separate floodplain management powers). The District maps local Special Study Floodplains that fill gaps in FEMA's FIRMs, covering more than half of known flood hazards in Pima County. FEMA updated preliminary flood maps in January 2026 for Pima County and surrounding towns, with 90-day appeal period through April 29, 2026. Affected areas include: Oro Valley - La Cholla Wash, Lomas De Oro Wash, Santa Cruz River (upper/southern), Bear Creek, Sabino Creek, Cienega Creek. The Floodplain Ordinance applies where peak discharge is 100+ cfs or sheet flooding occurs. Conflicts resolved in favor of stricter standard. Desert wash/arroyo flash flooding is the primary hazard throughout unincorporated Pima County.
Unauthorized floodplain development: stop-work order, removal, and fines. Title 16 enforcement by RFCD.
Pima County, AZ
Pima County Code §9.30.070 restricts outdoor construction noise to permitted hours. Concrete work: 5 AM–7 PM (Apr 15–Oct 15) and 6 AM–7 PM (Oct 16–Apr 14). A...
Pima County, AZ
Pima County Code Chapter 9.30 and animal control code (Chapter 6.04) cover excessive animal noise. Pima Animal Care Center (PACC) handles barking dog complai...
Pima County, AZ
Pima County Code Chapter 9.30 prohibits excessive, unnecessary, or offensive noise that disturbs the peace or quiet of any neighborhood or causes discomfort ...
Pima County, AZ
Pima County has no outdoor music or amplified sound ordinance for unincorporated areas. ARS 13-2916 applies to unreasonable noise. Event venues may have CUP ...
Pima County, AZ
Pima County Zoning Code Chapter 18.67 regulates fences and walls in unincorporated areas. Front-yard walls max 3 feet in residential zones. Side/rear walls m...
Pima County, AZ
ARS 36-1681 requires 5-ft pool barriers with self-closing, self-latching gates in Pima County. Applies to all pools 18+ inches deep. Door alarms or safety co...
Side-by-side rule comparisons with other cities in Pima County.
See how other cities in Pima County handle flood zones.
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