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

Lot coverage in the City of Maricopa is governed by the zoning code, MCC Title 18, where each district's development standards table establishes maximum building or lot coverage along with minimum lot area, setbacks, and height. For single-family districts the controlling table is 18.35.030 (RS Districts), and for multi-family the standards are in 18.35.040 (RM, RH, RMHP); these tables, rather than one citywide percentage, set the applicable coverage for a given lot. RS minimum lot sizes scale by district, for example RS-2 lots of at least 12,000 square feet, RS-3 at least 9,000, RS-4 at least 7,000, and RS-5 generally at least 5,000 square feet, which affects how much of a lot can be covered. For accessory development specifically, the City of Maricopa Residential Accessory Structures Guide provides that detached accessory structures shall not occupy more than 30 percent of the required rear yard setback. Open-space requirements also apply in some RS subdivisions (for example, projects with smaller lots must reserve a minimum percentage of net acreage as open space). Because most lots in the City of Maricopa are within master-planned, HOA-governed subdivisions, the approved subdivision plat and HOA standards frequently set the practical building envelope and impervious-surface limits. Owners should confirm the specific district's coverage figure in the development standards table or with the Planning and Zoning Division before relying on a generic number.