Laguna Niguel, CA Noise from Specific Sources: HVAC & Mechanical Noise (2026)

Section 6-6-2 defines 'fixed noise source' to include, among other stationary equipment, 'air conditioners and refrigeration equipment,' which places HVAC noise squarely under the general limits in Section 6-6-5 (exterior: 55 dB(A) from 7:00 a.m. to 10:00 p.m., 50 dB(A) overnight) and Section 6-6-6 (interior: 55 dB(A) by day, 45 dB(A) overnight), both measured on Zone 1 residential property under Section 6-6-4. Section 6-6-9 created a temporary grandfather allowance: for five years after the noise ordinance's effective date, adopted by Ord. No. 90-11 on March 6, 1990, the standards in Sections 6-6-5 and 6-6-6 were increased by eight dB(A) for any air conditioning or refrigeration system, or its associated equipment, that was already installed before that effective date.

That five-year window closed around March 1995, so a unit installed before 1990 no longer carries any extra allowance today; every air conditioning or refrigeration unit in the city, old or new, must now meet the ordinary Section 6-6-5 and 6-6-6 limits. A homeowner bothered by a neighbor's noisy condenser or heat pump measures the noise the same way as any other fixed source complaint, at any point on the affected property for exterior readings or at least four feet from an interior wall for indoor readings under Section 6-6-10.