Key Facts Full Breakdown Violations FAQ Sources

Maricopa County, AZ Building Setbacks & Zoning: Lot Coverage Limits (2026)

Some Restrictions

Verified 1 month ago|Source: https://www.maricopa.gov/6159/Zoning-Ordinance →

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Key Facts

Authority: MCZO district-specific standards
Accessory Coverage: Max 30% of required yard
Variation: Coverage varies by zoning district
Permit: Building permit verifies compliance

City-specific rules exist: Goodyear, Chandler, Gilbert, Phoenix, Mesa, Glendale, Tempe, Peoria, and Scottsdale have their own lot coverage limits rules that differ from Maricopa County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Summary

Maximum lot coverage in unincorporated Maricopa County is determined by the zoning district. The MCZO establishes maximum building coverage percentages for each district. Accessory structures cannot occupy more than 30% of any required yard. Rural districts have lower coverage maximums than suburban residential districts.

Full Breakdown

Maximum lot coverage in unincorporated Maricopa County is set by the MCZO for each zoning district, typically ranging from 15% in rural zones to 40% in higher-density residential zones. Accessory structures in required yards cannot occupy more than 30% of the required yard area. Lot coverage calculations include the footprint of all roofed structures such as the main dwelling, garages, carports, sheds, and covered patios. Uncovered patios, driveways, and walkways are generally excluded from lot coverage calculations but may count toward impervious surface limits in floodplain areas regulated by the Flood Control District of Maricopa County (FCDMC).

Violations & Fines

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.

Frequently Asked Questions

What is the maximum lot coverage allowed in unincorporated Maricopa County?

Maximum lot coverage varies by zoning district under the Maricopa County Zoning Ordinance. Typical rural residential districts allow 25-35% coverage, while higher-density zones may allow more. Contact Planning and Development at (602) 506-3301 to confirm the limit for your specific zoning district.

What counts toward lot coverage in unincorporated Maricopa County?

Lot coverage generally includes all roofed structures: the main house, garages, carports, covered patios, and accessory buildings. Open structures like pergolas without solid roofs and swimming pools may be excluded. Confirm with Maricopa County Planning at (602) 506-3301 for your zoning district.

Can I exceed the lot coverage limit with a variance in Maricopa County?

You may apply for a variance through the Maricopa County Board of Adjustment if you can demonstrate a unique property hardship. The application requires a public hearing. Contact Planning and Development at (602) 506-3301 for the variance application process and requirements.

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Maricopa County, AZ Building Setbacks & Zoning: Lot Coverage Limits (2026)

Key Facts

Summary

Full Breakdown

Violations & Fines

Frequently Asked Questions

Sources & Official References

Related Maricopa County Ordinances

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Parking Rules: Curb Color Rules

Fire Regulations: Smoke Detectors

Home Business: Home Occupation Permits

Short-Term Rentals: Night Caps

Rental Inspections: Lead-Hazard Inspections

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