Construction hours in Washington, DC — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
DC regulates construction noise under 20 DCMR 2803, with specific decibel limits for construction activities in residential zones. Construction work generating excessive noise is generally restricted during nighttime quiet hours (10 PM to 7 AM) and requires DOB permits.
Construction noise in DC is governed by 20 DCMR 2803, which sets specific limits for construction activities in residential areas. The general residential limits of 60 dBA daytime and 55 dBA nighttime apply, but construction equipment often exceeds these thresholds, requiring noise mitigation measures. After-hours construction work needs special authorization from the Department of Buildings. Emergency utility repairs and public safety work are exempt from hour restrictions. Contractors must use equipment with functioning mufflers and implement noise control measures when working near residential properties. The DOB can issue stop-work orders for construction sites violating noise regulations.
Noise violations carry fines of $500 to $2,000. DOB may issue stop-work orders for repeated or egregious construction noise violations.
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See how Washington's construction hours rules stack up against other locations.
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