Construction hours in Northglenn, CO — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Colorado state law expressly exempts construction activity from statutory noise limits during daytime hours, applying uniformly across municipalities though stricter local construction-hour rules remain enforceable.
C.R.S. 25-12-103 exempts construction projects from the statewide decibel limits between 7:00 a.m. and 7:00 p.m., recognizing that ordinary construction work generates noise above residential thresholds. Outside that window, construction must comply with the applicable zone-based dB(A) limits unless the activity is an emergency repair to a public utility or transportation facility. The exemption applies to construction, maintenance, and repair operations conducted within the daytime envelope. Local governments retain authority to set narrower construction hours, require permits, or impose additional weekend and holiday restrictions.
Construction noise outside the 7 a.m.–7 p.m. exemption window may be enforced as a public nuisance under C.R.S. 25-12-108 and may also trigger local stop-work orders or fines.
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Side-by-side rule comparisons with other cities in Adams County.
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