Construction hours in Seattle, WA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Under SMC 25.08, construction is permitted 7 AM–7 PM on weekdays and 9 AM–7 PM on weekends and legal holidays. Construction noise may not exceed 75 dBA. SDCI enforces; violations may result in stop-work orders.
Under SMC Chapter 25.08, construction work is permitted from 7 AM to 7 PM on weekdays and from 9 AM to 7 PM on weekends and legal holidays. Construction noise levels may not exceed 75 dBA. The 9 AM weekend start is notably later than many West Coast cities. SDCI enforces construction noise complaints and can be reached at (206) 615-0808 during business hours. Violations may result in stop-work orders. Emergency construction and utility work may be exempt with proper authorization. Impact equipment such as pile drivers may have additional restrictions.
Noise violation citation: $150 to $1,000 first offense. Fines double for subsequent violations. Stop-work order possible for persistent violations.
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Side-by-side rule comparisons with other cities in King County.
See how other cities in King County handle construction hours.
See how Seattle's construction hours rules stack up against other locations.
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