Construction hours in Concord, CA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Construction activity in Concord is generally permitted Monday through Friday from 7:30 AM to 6:00 PM and Saturdays from 8:00 AM to 5:00 PM. Construction is prohibited on Sundays and city-recognized holidays without a special permit. These hours apply to both commercial and residential projects, including homeowner DIY work that generates significant noise.
Concord regulates construction noise under Municipal Code Chapter 82 and through permit conditions issued by the Building Division. Allowable hours of operation are intended to balance development needs against resident quiet enjoyment. Standard construction hours are 7:30 AM to 6:00 PM Monday through Friday and 8:00 AM to 5:00 PM on Saturday. No construction is permitted on Sundays or federal holidays unless a written exception is granted by the Building Official, typically for emergency repairs, public works requirements, or time-sensitive concrete pours. All construction activity must comply with BAAQMD dust control Rule 403 and with the city's noise ordinance at the property line. Violations are enforced by Code Enforcement with administrative citations, and repeat violators can face stop-work orders. Contractors are required to post permit cards visibly on the jobsite. Homeowners performing their own work are subject to the same hour restrictions as contractors. CEQA mitigation measures for larger projects may impose additional restrictions such as limited haul truck hours or required noise barriers.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Contra Costa County.
See how other cities in Contra Costa County handle construction hours.
See how Concord's construction hours rules stack up against other locations.
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