Quiet hours in San Diego run in two tiers after the workday ends: evening limits take effect at 7:00 p.m., and the strictest nighttime limits start at 10:00 p.m. and last until 7:00 a.m. the next morning. The rules sit in Article 9.5 of the San Diego Municipal Code, and they apply every day of the week, weekends included. What counts as a violation depends on the decibel level at your property line, the zoning of the property receiving the noise, and in some cases the type of activity making it.
The Three Time Windows
San Diego Municipal Code Section 59.5.0401 splits each 24-hour period into three parts:
- Daytime: 7:00 a.m. to 7:00 p.m.
- Evening: 7:00 p.m. to 10:00 p.m.
- Nighttime: 10:00 p.m. to 7:00 a.m.
In most residential zones, evening limits drop by 5 decibels from daytime, and nighttime drops another 5 decibels below evening. The 10:00 p.m. cutoff is what most people think of as quiet hours, and it is the window where even moderate household noise can push past the legal ceiling.
How Loud You Can Be at Night
Compliance is measured as a one-hour average sound level at or beyond the property boundary of wherever the noise originates. A short spike is not automatically a violation, but sustained noise is. The ceilings depend on the zone of the property receiving the sound:1San Diego Municipal Code. San Diego Municipal Code Chapter 5 – Article 9.5: Noise Abatement and Control, Division 4
- Single-family residential (R-1): 50 dB daytime, 45 dB evening, 40 dB nighttime
- Multi-family residential (up to 1/2,000 density): 55 dB daytime, 50 dB evening, 45 dB nighttime
- All other residential: 60 dB daytime, 55 dB evening, 50 dB nighttime
- Commercial: 65 dB daytime, 60 dB evening, 60 dB nighttime
- Industrial or agricultural: 75 dB at any time
For reference, 40 dB is roughly the sound inside a quiet library, and 50 dB is about the volume of normal conversation. In a single-family neighborhood after 10:00 p.m., noise at the property line has to stay below that library threshold. That is why a window air-conditioner, a pool pump, or an outdoor speaker can trigger a code issue even without a party involved.
Construction Hours
Construction has its own schedule under SDMC Section 59.5.0404. Work that produces disturbing or excessive noise is allowed only between 7:00 a.m. and 7:00 p.m., Monday through Saturday. Sundays and most legal holidays are off-limits.1San Diego Municipal Code. San Diego Municipal Code Chapter 5 – Article 9.5: Noise Abatement and Control, Division 4
A contractor who needs to work outside those hours has to apply for a Construction Noise Permit, which costs $439.80. Once approved, the permit holder must notify every resident, hotel, and business within 500 feet at least 72 hours before off-hours work begins.2City of San Diego Official Website. Construction Noise Permit Emergency repairs are exempt from the time limits, but the Noise Abatement and Control Administrator has to be notified within 48 hours after the work starts.
Leaf Blower Hours
Engine-powered leaf blowers in residential zones are restricted under SDMC Section 59.5.0502(g):
- Weekdays: 8:00 a.m. to 7:00 p.m.
- Weekends and legal holidays: 9:00 a.m. to 5:00 p.m.
On top of the time window, no leaf blower may exceed 65 decibels measured at 50 feet from the source, and every unit must have a functional muffler and an approved sound-limiting device.3San Diego Municipal Code. San Diego Municipal Code Chapter 5 – Article 9.5: Noise Abatement and Control, Division 5 The weekend window is shorter than the weekday one, which catches a lot of landscape crews out.
Barking Dogs and Nuisance Noise
Not every violation requires a decibel reading. SDMC Section 59.5.0501 prohibits any disturbing, excessive, or offensive noise that would annoy a reasonable person in the area, with factors including the time of day, how long the noise lasts, and how close it is to sleeping areas.3San Diego Municipal Code. San Diego Municipal Code Chapter 5 – Article 9.5: Noise Abatement and Control, Division 5
Barking dogs get their own treatment under SDMC Section 59.5.0502(c), which targets animal noise that is frequent or long-continued enough to cause annoyance. The code builds in an evidentiary shortcut: if the noise disturbs two or more residents in separate adjacent homes, or three or more residents in separate homes in close proximity, that alone is sufficient evidence of a violation.
Short-Term Rentals
Vacation rental properties carry extra rules. Every short-term residential occupancy (STRO) host has to designate a local contact who must respond to any noise complaint within one hour, in person or by phone, and act to resolve it. The contact’s information has to be posted on exterior signage at the property. If they do not respond within the hour, neighbors can report the issue through the Get It Done app and call the police non-emergency line at 619-531-2000. Hosts who fail to comply face civil penalties and possible license revocation.4City of San Diego Official Website. Short-Term Residential Occupancy
What’s Exempt
The exemptions from the general decibel limits are narrow. They cover firework displays authorized by a Fire Department permit, helicopters at heliports or helistops operating under a conditional use permit, roller coasters on city-owned parkland, and authorized emergency vehicles using sirens or horns during an emergency.1San Diego Municipal Code. San Diego Municipal Code Chapter 5 – Article 9.5: Noise Abatement and Control, Division 4 A backyard wedding, a generator, or heavy machinery outside permitted hours does not qualify. If the activity is not on the list, the standard limits apply.
Penalties for Violating Quiet Hours
San Diego handles most noise enforcement as a civil matter. When police respond to a complaint, they usually start with a First Response Notice, which is a written warning. A return call for the same issue within 24 hours results in a Second Response Notice.5City of San Diego Official Website. Noise Complaints
Two First Response Notices within 60 calendar days, or a single Second Response Notice, can place a property under the Community Assisted Party Program (CAPP). Once a property carries that designation, officers respond with zero tolerance and can issue an Administrative Citation on any later valid complaint.
An Administrative Citation carries a $1,000 fine. It is not limited to CAPP properties; a responding officer can issue one at any address based on the location’s history, the severity of the noise, whether people cooperate, and whether alcohol is present. Because the process is civil, the result is a fine rather than a criminal record, and the person cited has the right to appeal.
How to Report a Noise Violation
The right channel depends on what is making the noise. For an active human-generated disturbance, like a loud party or amplified music, call the San Diego Police non-emergency line at 619-531-2000 while the noise is still happening. If the noise stops before officers arrive, they cannot take enforcement action unless you are willing to sign a formal complaint.
For non-human-generated noise, including construction outside permitted hours, barking dogs, pool pumps, compressors, and air-conditioners, use the city’s Get It Done app or website. These complaints go to the Development Services Department’s Building and Land Use Enforcement (BLUE) division rather than to police.6City of San Diego. How Are Noise Complaints Handled? For a short-term rental, start with the local contact posted on the property; if they do not respond within an hour, file through Get It Done and call the non-emergency line.
Document the date, time, duration, and source of the noise. For a barking dog, lining up two or more neighboring households to corroborate the disturbance significantly strengthens the case, because the code treats that corroboration as presumptive evidence of a violation.