City of San Diego Municipal Code: Noise, Fences, and Rentals

The San Diego Municipal Code is the full body of local laws that govern what people, property owners, and businesses can do inside city limits. It covers noise at your property line, how much of your lot you can build on, how far a cannabis shop has to sit from a school, how often you can water your lawn, and what happens when you ignore a city notice. The entire code is published free on the City Clerk’s website at sandiego.gov, and it is updated each time the City Council adopts a new ordinance. You can also reach the City Clerk’s office at 619-533-4000 or sign up for email notifications when sections change.¹

How the Code Is Laid Out

The code is divided into 15 chapters, each covering a broad subject. Chapters 1 and 2 handle general government. Chapter 3 covers business regulations and taxes. Chapter 4 addresses health and sanitation. Chapter 5 covers public safety, morals, and welfare. Chapters 6 through 10 deal with public works, utilities, traffic, and buildings. Chapters 11 through 15 make up the Land Development Code, which runs zoning, permits, and construction rules throughout the city.¹

Each chapter breaks down further into articles, divisions, and numbered sections. When you see a citation like SDMC 63.0404, the first digits tell you the chapter and article, and the rest points to the specific section.

Noise Limits at Your Property Line

Chapter 5, Article 9.5 sets decibel limits that depend on the type of neighborhood and the time of day. The limits are measured as a one-hour average at the boundary of the property producing the noise, not inside the complaining neighbor’s house.² Between 10 p.m. and 7 a.m., the nighttime caps are:

Single-family residential: 40 decibels
Multi-family residential: 45 decibels
All other residential: 50 decibels
Commercial: 60 decibels
Industrial or agricultural: 75 decibels (no time restriction)

Between 7 a.m. and 7 p.m., each residential cap goes up by 10 decibels, so a single-family lot tops out at 50 and a commercial zone at 65. For reference, 40 decibels is roughly a quiet library and 50 is normal conversation. Enforcement officers can cite on the spot once a reading exceeds the limit.²

Water Use and Stormwater

San Diego’s water-use rules apply year-round, not just in declared drought years. Outdoor irrigation is only allowed before 10 a.m. or after 6 p.m. You cannot water landscaping during measurable rainfall or within 48 hours after. A hose used to wash a car needs a shut-off nozzle. Hosing driveways or sidewalks is banned unless you are dealing with an immediate safety hazard and capturing the runoff. Ornamental fountains cannot use non-recirculating water, single-pass cooling systems are prohibited, and restaurants and hotels can serve drinking water only on request. Hotel guests must be given the option to skip daily towel and linen laundering. Any water leak has to be fixed within 72 hours of city notice.³

Stormwater violations carry the sharpest teeth. Under SDMC 43.0304, discharging pollutants into the city’s storm sewer, including irrigation runoff from over-watering, can draw penalties of up to $10,000 per day per incident.⁴

Dog Licensing

California law requires every dog to be vaccinated against rabies and licensed within 30 days of turning four months old, being acquired, or entering a new jurisdiction. In San Diego, the San Diego Humane Society handles licensing for the city. An annual license costs $20 for a spayed or neutered dog and $60 for an unaltered one, with multi-year discounts available. Owners who skip licensing or fail to restrain their dogs face escalating penalties.⁵

Fence Heights and Setbacks

Fence rules shift based on where on your lot the fence sits and whether it is solid or open. In a front yard or street-side yard, a solid fence at the property line is capped at 3 feet. That allowed height increases as the fence steps back from the property line, reaching up to 6 feet at the setback line. Open fences (other than chain link) can go up to 6 feet right at the property line. In side and rear yards, fences can reach 9 feet, but any portion above 6 feet has to be an open fence that lets light through.⁶

Setbacks for buildings themselves vary by zone. Some residential zones require 15-foot front setbacks for a portion of units and 10 or 20 feet for others. Side yard setbacks run from 3 to 5 feet depending on lot width and zone, and narrow lots are sometimes allowed to drop side setbacks to 10 percent of lot width.⁷ Structural work needs a building permit and has to meet the California Building Standards Code.

Accessory Dwelling Units

Under the 2024 Land Development Code updates, ADUs have to stay within the base zone’s maximum structure height. A detached ADU taller than 16 feet that sits next to a residential property line has to keep at least a 4-foot setback from interior side and rear yards, or the base zone setback if that is less. Multiple-ADU properties follow the standard zone rules for height, lot coverage, and floor area ratio.⁸

Historical Properties

If your property is designated by the Historical Resources Board, falls within an adopted historical district, or appears on the California or National Registers, the Development Services Department has to review proposed alterations before you start, even work that would normally skip the permit process.⁹

Short-Term Rentals

Anyone renting a residential property for fewer than 30 consecutive days needs a Short-Term Residential Occupancy (STRO) license. Before applying, you need an active Transient Occupancy Tax certificate and a paid Rental Unit Business Tax account.¹⁰ The system has four tiers:

Tier 1 (Part-Time): rentals totaling 20 days or fewer per year, host presence not required.
Tier 2 (Home Sharing): host rents a room while continuing to live onsite, allowed for more than 20 days per year.
Tier 3 (Whole Home, excluding Mission Beach): host can be absent for up to 90 days per calendar year, two-night minimum stay, total licenses capped at 1% of citywide housing units outside the Mission Beach Community Planning Area.
Tier 4 (Mission Beach Whole Home): two-night minimum, licenses capped at 30% of housing units in the Mission Beach Community Planning Area.

Tier 3 and Tier 4 holders have to actually rent the property for at least 90 days each year to keep the license. A host can hold only one STRO license at a time. As of March 2026, the Tier 3 application period was open and the Tier 4 window had closed.¹⁰

Unsafe Camping on Public Property

SDMC 63.0404 restricts sleeping or camping in public spaces. In certain sensitive areas, the ban applies whether or not shelter beds are available:

Within two blocks of any K-12 school
Within two blocks of a shelter
Along trolley tracks and transportation hubs
In city parks where a substantial public health and safety risk is identified
In open space, waterways, or along the banks of a waterway

Enforcement sits with the San Diego Police Department’s Neighborhood Policing Division.¹¹

Rules That Apply To Businesses

Business Tax Certificate

Anyone doing business in San Diego has to register for a Business Tax Certificate through the City Treasurer. Late fees apply once you are more than 15 days past the business start date.¹²

Cannabis Outlets

A cannabis outlet has to sit at least 1,000 feet from schools, child care centers, churches, playgrounds, libraries, minor-oriented facilities, residential care facilities, resource-based city parks, and other cannabis outlets. It also has to stay at least 100 feet from any residential zone. The buffers are measured in a straight line between property boundaries.¹³

Sidewalk Vending

Sidewalk vendors face a layered set of location rules. Vending is prohibited within 500 feet of a permitted event, within 500 feet of a school during arrival, dismissal, or recess, and anywhere in the Ballpark District during events. Vendors have to stay at least 15 feet from intersections, building entrances, other vendors, and any high-traffic sidewalk or shared-use path. They cannot operate within 25 feet of a beach access point or pier, or within 50 feet of a railroad crossing or major transit stop. Near fire stations, police stations, and hospitals, they have to keep 100 feet from vehicle entrances. Vending is also banned on any public property that is not a sidewalk, so beaches, alleys, street medians, and parking lots are off-limits.¹⁴

What Happens If The City Cites You

Most enforcement begins with a Notice of Violation from a department director or enforcement official. The notice identifies the code sections violated, describes the problem, lists the corrections needed, sets a compliance deadline, and warns of the possible consequences, including criminal prosecution, civil penalties, permit revocation, and withholding of future permits.¹⁵

If the case moves to an administrative enforcement hearing, the city has to serve written notice at least 10 calendar days ahead. Hearings are informal and the formal rules of evidence do not apply, but both sides can present evidence and cross-examine witnesses. The city has to prove the violation by a preponderance of the evidence. The hearing officer issues a written Administrative Enforcement Order that becomes final on the date it is served.¹⁶

For violations that stay uncorrected, the city can pursue administrative civil penalties under Chapter 1, Article 2, Division 8. A Notice and Order spells out the sections violated, the required corrective actions, and a daily penalty amount. The maximum rate is $10,000 per violation, assessed every day until the problem is fixed.¹⁷ Two weeks of silence can turn into six figures, which is why responding to any city notice quickly is worth the effort.

Criminal prosecution is also on the table. Municipal code violations are classified as misdemeanors, and the general statute of limitations for filing a complaint is one year from the date of the offense under California Penal Code 801. Some offenses are designated as continuing violations, meaning each day the violation persists counts as a separate offense, which effectively keeps the prosecution window open until the problem is resolved.

1
City of San Diego. Municipal Code
2
San Diego Municipal Code. San Diego Municipal Code Chapter 5 Article 9.5 Division 4 – Limits
3
City of San Diego. Water Use Restrictions
4
Think Blue San Diego. Irrigation Runoff Fact Sheet
5
San Diego Humane Society. Dog Licensing
6
San Diego Municipal Code. San Diego Municipal Code Chapter 14 Article 2 Division 3 – General Development Regulations
7
San Diego Municipal Code. San Diego Municipal Code Chapter 13 – Zones
8
City of San Diego. Accessory Dwelling Unit/Junior Accessory Dwelling Unit
9
City of San Diego. Designated Historical Resource Review
10
City of San Diego. Short-Term Residential Occupancy
11
City of San Diego. Unsafe Camping Ordinance
12
City of San Diego. Apply for a Business Tax Certificate
13
City of San Diego. Cannabis Information
14
City of San Diego. Guide to Sidewalk Vending
15
San Diego Municipal Code. San Diego Municipal Code Chapter 1 General Provisions – Code Enforcement
16
San Diego Municipal Code. San Diego Municipal Code Chapter 1 Article 2 Division 4 – Administrative Enforcement Hearing Procedures
17
San Diego Municipal Code. San Diego Municipal Code Chapter 1 Article 2 Division 8 – Administrative Civil Penalties