Noise from Specific Sources in Issaquah, WA (2026)
1 verified noise from specific sources rules for Issaquah, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
HVAC & Mechanical Noise
In Issaquah, heat pumps, air conditioner condensers and similar mechanical equipment on single-family and townhome lots must not exceed 55 dbA during the day and 45 dbA at night, measured at the property line. A unit that cannot meet that standard must add all three listed mitigation measures. LUC 18.518.020(D) separately exempts such units from the WAC-based limits at 73dbA or AHRI standard 270.
Issaquah Heat Pump and Air Conditioner Noise Limits
Some RestrictionsIssaquah Land Use Code § 18.508.030(D); § 18.518.020(D)
D. Mechanical Equipment. ... Heat pumps, air conditioner condensers, and similar mechanical equipment located on single-family and townhome lots must not exceed 55 dbA during the day and 45 dbA at night as measured at the property line. If this State-adopted standard cannot be met, then the units shall provide all the following mitigation measures. 1. Placed farthest from the neighboring proper...
Looking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Issaquah city rules.
Noise from Specific Sources in King County →