Construction hours in Benton County, WA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Construction noise in unincorporated Benton County is exempt from WAC 173-60 limits while work is underway, but that exemption disappears in residential areas between 10 p.m. and 7 a.m., which effectively sets nighttime quiet.
Washington doesn't hand counties a fixed 7 a.m. start rule; instead WAC 173-60-050 exempts temporary construction-site noise from the environmental noise ceiling, except in Class A residential areas overnight. So a contractor grading a lot near West Richland or framing a home in Badger Canyon can run equipment loud by day, but noise reaching a residence between 10 p.m. and 7 a.m. loses the exemption and becomes actionable. Benton County's building permits govern the work itself, not the hours. Kennewick, Richland, and Prosser add their own construction-hour limits within city limits, and subdivision covenants often tighten them further.
Nighttime construction noise reaching residential property loses its WAC 173-60-050 exemption and can draw a Sheriff response and nuisance enforcement under BCC 6A.15, including abatement orders.
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See how Benton County's construction hours rules stack up against other locations.
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