Construction hours in Arapahoe County, CO — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Unincorporated Arapahoe County does not have a separate construction hours ordinance. Colorado state law CRS 25-12-103 applies construction noise at industrial zone standards. Construction is effectively permitted during standard daytime hours with higher decibel allowances.
Arapahoe County does not impose specific construction hour restrictions in unincorporated areas beyond state law. Under CRS 25-12-103, construction projects are held to industrial zone noise limits rather than residential limits, giving construction activities more leeway. Industrial zone limits are 80 dBA daytime and 75 dBA nighttime. This effectively allows construction during reasonable hours. The county requires building permits for all construction in unincorporated areas, and permit conditions may include timing restrictions near sensitive areas. HOA covenants frequently establish their own construction hour windows.
State noise statute violations carry civil penalties up to $500 per occurrence. Construction without required permits may result in stop-work orders and additional fines.
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See how Arapahoe County's construction hours rules stack up against other locations.
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