Construction hours in Boulder, CO — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Boulder allows construction typically 7 AM to 7 PM weekdays, 8 AM to 5 PM Saturdays. Sunday and holiday work generally restricted.
Construction in Boulder is limited to designated hours under the municipal code. Most Colorado cities allow 7 AM to 7 PM Monday through Friday and 8 AM to 5 PM Saturday, with Sunday and holiday work restricted or prohibited. Equipment must have functioning mufflers. Emergency utility work by providers like Xcel Energy is exempt. Extended-hours permits available for large projects through the building department.
First offense: $200 to $500. Stop-work orders for violations outside permitted hours. Repeat offenses: up to $1,000.
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See how Boulder's construction hours rules stack up against other locations.
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