Showing ordinances that apply to Mirrormont, WA
Mirrormont is an unincorporated community (population 3,858) in King County, Washington. Because Mirrormont is not an incorporated city, it does not have its own municipal code. Instead, King County ordinances apply directly to properties here. The hvac & mechanical noise rules below are the ones that govern your area.
HVAC equipment in unincorporated King County must meet KCC 12.86 limits of 55 dBA day and 45 dBA night at adjacent property lines. Setback, sound blankets, or enclosures are often required for nighttime compliance.
King County Code Chapter 12.86 applies to residential mechanical equipment under WAC 173-60. Heat pumps and AC condensers must meet 55 dBA daytime and 45 dBA nighttime limits at the adjacent property line. Modern variable-speed heat pumps typically operate at 40-55 dBA at 3 feet, meaning setback or acoustic shielding is often required near property lines to meet the 45 dBA night limit. King County Department of Local Services permit review includes mechanical setbacks, and the 2021 International Residential Code as adopted in Washington requires minimum 3-foot setbacks from property lines for outdoor condensing units. Common mitigation includes sound blankets, louvered enclosures, and positioning away from shared boundaries. KCC 21A.22.080 requires mechanical equipment to meet state energy code but does not impose additional noise limits beyond KCC 12.86. Pool and spa heaters are subject to the same standards. Complaints are handled through King County Code Enforcement with potential acoustical measurement for chronic issues.
Civil infraction under KCC 23.02. Property owner may be ordered to abate (relocate, enclose, or replace) within 30-60 days. Fines up to 500 dollars per day of continued violation.
See how Mirrormont's hvac & mechanical noise rules stack up against other locations.
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