Construction hours in Boulder County, CO — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Construction in residential areas of unincorporated Boulder County may not exceed 80 dB(A) from 7 a.m. to 7 p.m., or 75 dB(A) from 7 p.m. to 7 a.m. The higher daytime cap applies for the permitted construction period.
Ordinance No. 92-28, Section 1.01.050(D) gives construction projects in residential areas a raised noise ceiling of 80 dB(A) during the day (7 a.m.-7 p.m.) and 75 dB(A) at night (7 p.m.-7 a.m.), applied for the time allowed by any Boulder County construction permit, or a reasonable completion period if no limit is set. This is far higher than the general 55/50 dB(A) residential caps, recognizing that building work is temporarily louder. Cities within the county (Boulder, Longmont) set their own construction hours, which are typically stricter.
Exceeding the construction limits is a Class 2 Petty Offense under Sec 1.01.190: $30 per violation, escalating $30 per repeat within one year to a $300 maximum, plus court costs.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Boulder County, CO
Boulder County has no separate 'hoarding' ordinance, but Ordinance 2022-8 makes it unlawful to fail to provide any livestock or domestic animal with minimum ...
Boulder County, CO
Boulder County residents may not intentionally feed big game or bears. Colorado Parks and Wildlife regulation and C.R.S. 33-6-131 make it illegal to intentio...
Boulder County, CO
Backyard composting is allowed and strongly encouraged in Boulder County. The county's Zero Waste program provides compost collection, but home compost piles...
Boulder County, CO
Boulder County sets no countywide ban on residential artificial turf. Colorado SB23-178 prevents HOAs from prohibiting nonvegetative turf grass, though droug...
Boulder County, CO
Boulder County encourages native and water-wise landscaping and imposes no lawn requirement on rural land. Colorado law (SB23-178) bars HOAs from banning xer...
Boulder County, CO
Under Colorado HB16-1005, Boulder County residents may collect rooftop rainwater in up to two rain barrels totaling no more than 110 gallons, for outdoor use...
See how Boulder County's construction hours rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.