Noise Ordinances in Altadena, CA (2026)

5 verified noise ordinances for Altadena, California, sourced directly from the municipal code and official government pages.

Verified from official government sources

Quiet Hours

Altadena is unincorporated, so LA County Title 12 Chapter 12.08 (Noise Control) applies. Nighttime exterior limits run 10:00 p.m. to 7:00 a.m. with stricter dB caps; daytime runs 7:00 a.m. to 10:00 p.m.

Altadena Quiet Hours (LA County Code Ch. 12.08)

Some Restrictions

Full ordinance details →Official source ↗

Construction Hours

LA County Code Section 12.08.440 limits construction noise in residential areas to 7:00 a.m.–8:00 p.m. weekdays and 8:00 a.m.–8:00 p.m. on Saturdays. No construction is allowed on Sundays or county holidays.

Altadena Construction Hours (LA County Code 12.08.440)

Some Restrictions

Full ordinance details →Official source ↗

Barking Dogs

LA County Code Section 10.36.010 prohibits owning or keeping any animal that habitually disturbs the peace by barking, howling, or other noise. Enforced by LA County Animal Care & Control.

Altadena Barking Dog Rules (LA County Code Ch. 10.36)

Some Restrictions

Full ordinance details →Official source ↗

Leaf Blower Rules

LA County does not have a county-wide gas leaf-blower ban, but operation is subject to the Ch. 12.08 dB limits and construction-hours rules (7 a.m.–8 p.m. weekdays).

Altadena Leaf Blower Rules (LA County Code 12.08)

Some Restrictions

Cal. Health & Safety Code Sec. 43018.11 (AB 1346 - Zero-Emission Small Off-Road Engines / Leaf Blowers)

43018.11 to the Health and Safety Code, relating to air pollution. [ Approved by Governor October 09, 2021. Filed with Secretary of State October 09, 2021. ] LEGISLATIVE COUNSEL'S DIGEST AB 1346, Berman. Air pollution: small off-road engines. Existing law imposes various limitations on the emissions of air contaminants for the control of air pollution from vehicular and nonvehicular sources. Ex...

Full ordinance details →Official source ↗

Decibel Limits

Exterior noise in Altadena's residential zones is capped at 50 dBA daytime / 45 dBA nighttime (single-family); 55/50 dBA (multi-family); 60/55 dBA commercial; 70 dBA all hours industrial.

Altadena Decibel Limits (LA County Code 12.08.390)

Some Restrictions

Full ordinance details →Official source ↗

Looking for Los Angeles County county-wide rules?

County ordinances apply to unincorporated areas and may supplement Altadena city rules.

Noise Ordinances in Los Angeles County →