Longmont, CO Noise Ordinances: Construction Hours (2026)
Construction hours in Longmont, CO, sometimes called construction noise rules or contractor work-hour ordinances, set when contractors can run power tools, hammers, and heavy equipment.
Key Facts
- Quiet hours
- 7pm-7am Mon-Sat, before 9am Sun
- Coverage area
- residential areas or within 500 ft of school
- Exception
- economic development director approval
- Enforcement
- public nuisance action, §10.20.110
Summary
Longmont bans construction activity noise in residential areas or within 500 feet of a school between 7 p.m. and 7 a.m. weekdays and Saturdays, and before 9 a.m. on Sundays, absent an approved exception.
"Construction activities. No activity incidental to the erection, demolition, assembling, altering, installing or equipping of buildings, structures, roads or appurtenances thereof, including land clearing, grading, excavating and filling shall occur between the hours of 7:00 p.m. and 7:00 a.m. Monday through Saturday or before 9:00 a.m. on Sundays, within a residential area or within 500 feet of a school, except for temporary conditions approved by the economic development director."
Full Breakdown
Section 10.20.100(D)(4) prohibits any activity incidental to erecting, demolishing, assembling, altering, installing or equipping buildings, structures, roads, or their appurtenances, including land clearing, grading, excavating and filling, between 7:00 p.m. and 7:00 a.m. Monday through Saturday, or before 9:00 a.m. on Sundays, within a residential area or within 500 feet of a school. The economic development director can approve temporary exceptions for specific conditions. Violations of the noise standards, including this construction-hours rule, are enforced as a public nuisance under Section 10.20.110, letting the city attorney sue to enjoin the noise.
Violations & Fines
Construction noise outside permitted hours near residences or schools is a public nuisance under §10.20.110; the city attorney may sue to enjoin it.
Frequently Asked Questions
What hours can construction crews work near homes in Longmont?
Who enforces Longmont's construction-noise hours?
Sources & Official References
Other rules in Longmont
How Longmont compares: Cities with the Strictest Construction Hours·Compare Longmont to another location·View the Colorado noise ordinances overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Construction Hours in Nearby Cities
How other cities in Boulder County handle construction hours.