San Francisco Backyard Fire Regulations Rules (2026): What You Need to Know
Heavy RestrictionsKey Facts
- Open burning
- Prohibited year-round — no burning of trash, leaves, yard waste, or debris
- Recreational fires
- Allowed only in approved manufactured fire pits or installed outdoor fireplaces
- Required clearance
- At least 15 feet from structures, fences, property lines, and combustible materials
- Fire pit size
- Maximum 3 feet in diameter; flames may not exceed 2 feet above the rim
- Spare the Air days
- All wood-burning prohibited on BAAQMD-declared alert days; gas/propane exempt
- Supervision
- Fire must be attended at all times with extinguishing means immediately available
The Short Version
San Francisco strictly regulates backyard fires due to its dense urban environment. Open burning of any kind is prohibited year-round under both the San Francisco Fire Code and the Bay Area Air Quality Management District (BAAQMD) Regulation 5. Small recreational fires are permitted only in approved, manufactured portable fire pits or permanently installed outdoor fireplaces that meet strict clearance and safety requirements. The San Francisco Fire Department (SFFD) enforces these rules aggressively, and BAAQMD imposes additional restrictions during Spare the Air days when all wood-burning is prohibited.
Full Breakdown
San Francisco — one of the most densely populated cities in the United States — enforces strict regulations on backyard fires through its adoption of the California Fire Code and local amendments codified in the San Francisco Fire Code. The city's tightly packed residential neighborhoods, many featuring wood-frame Victorian and Edwardian homes with minimal lot separations, create significant fire risk from uncontrolled outdoor burning.
Open burning of any material — including trash, yard waste, leaves, construction debris, and vegetation — is prohibited at all times within San Francisco under both the Fire Code and BAAQMD Regulation 5, Rule 1. Small recreational fires for cooking, warmth, or ambiance are permitted only when conducted in an approved manufactured portable fire pit with a spark screen or mesh cover, a permanently installed masonry or prefabricated outdoor fireplace, or similar commercially manufactured devices designed for contained outdoor fires.
Under the California Fire Code as adopted by San Francisco, recreational fires must maintain a minimum clearance of 15 feet from any structure, fence, property line, overhead obstruction (such as tree branches or patio covers), and combustible vegetation. The fire must not exceed 3 feet in diameter and flames must stay within 2 feet of the rim of the container. A competent adult must supervise the fire at all times, and a garden hose connected to a water supply or a fire extinguisher must be within immediate reach. Given the extremely tight lot configurations in many SF neighborhoods, achieving the 15-foot clearance may be impossible on smaller properties, effectively prohibiting recreational fires on those lots.
San Francisco is within the BAAQMD jurisdiction, which enforces Spare the Air alerts during fall and winter months. On declared Spare the Air days, all wood-burning in outdoor fire pits, fireplaces, and similar devices is prohibited. Gas and propane fire features are exempt. Residents can check the daily status at sparetheair.org or by calling 1-877-4-NO-BURN.
What Happens If You Violate This?
Violations of San Francisco's fire regulations are enforced by the SFFD through administrative citations and, for serious violations, criminal prosecution. First-offense citations for recreational fire violations typically carry fines of $100 to $500. Illegal open burning may be prosecuted as a misdemeanor under the California Health and Safety Code, with fines up to $25,000 and potential criminal liability if the fire causes property damage or endangers others. BAAQMD Spare the Air violations carry separate fines starting at $100 for a first offense and up to $500 for subsequent violations.
Frequently Asked Questions
Can I have a fire pit in my backyard in San Francisco?
Can I burn wood during a Spare the Air day in San Francisco?
Can I burn leaves or yard waste in San Francisco?
Sources & Official References
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