Maricopa County Construction Hours Rules (2026) — What You Need to Know

Maricopa County's Ordinance P-22 establishes permitted hours for construction activities in unincorporated areas. The ordinance distinguishes between seasonal periods and proximity to residential areas to determine when construction work may begin.

For construction in or within 500 feet of Rural or Residential zoning districts, or within 1,500 feet of an occupied residence, the rules are as follows: during the summer period (April 15 through October 15), construction may begin at 5:00 AM on weekdays (Monday through Friday). During the winter period (October 16 through April 14), construction may not begin until 6:00 AM. On Saturdays, Sundays, and federal holidays, construction may not begin before 6:00 AM year-round. All construction must stop by 7:00 PM on all days.

For construction in Commercial and Industrial zones that is not within 500 feet of a Rural or Residential zone, or in any zone but not within 1,500 feet of an occupied residence, construction may begin at 5:00 AM without seasonal variation. An "occupied" residence is defined as a habitable residential dwelling receiving electrical service, and distance is measured from the exterior walls of the building.

Arizona state law (SB 1182) provides additional protections for construction during summer months. Counties may not prohibit general construction activities between May 1 and October 15 during the hours of 5:00 AM to 7:00 PM on business days, or 7:00 AM to 7:00 PM on Saturdays, for work performed under a valid building permit. The county must also allow concrete pouring to begin at least one hour before general construction activities are permitted.