California wildfire landscaping rules were approved this week as the state moved to strengthen protections for neighborhoods facing increasingly severe fire seasons. The standards require homeowners in high-risk areas to limit plants within five feet of a house, a measure fire scientists say can reduce the chances that embers ignite structures.
Studies show dry, dense vegetation near buildings can accelerate wildfire spread. During extreme events, powerful winds can carry embers well ahead of the main fire. When those embers land in vegetation next to walls or under eaves, they can spark new fires that spread to nearby structures.
Wednesday’s vote by the California Board of Forestry and Fire Protection followed years of debate and postponements. Early proposals would have prohibited most vegetation in the first five feet around homes, except for well-maintained trees. That plan drew opposition from residents concerned about losing garden greenery and about the cost of upkeep.
Regulators settled on a compromise for the five-foot buffer, known as Zone Zero. Lawns, flowers and other non-woody plants up to 18 inches tall will be permitted, unless they sit directly beneath the roofline. Trees are allowed, but branches must be trimmed at least five feet from structures. The rules take effect immediately for new construction and will be phased in for existing homes, ultimately covering nearly 2 million properties in designated high-risk zones.
Officials said the policy acknowledges a new era of extreme fire behavior, driven in part by rising temperatures linked to climate change. More than 57,000 homes and other buildings have been destroyed in California over the past decade, according to state regulators.
“California’s faced an existential crisis that has affected our health, finances, the ability to buy and sell and insure homes, and has put us in a very precarious place,” Yana Valachovic of the University of California Cooperative Extension testified at the hearing. She advised the state on the standards.
California wildfire landscaping rules stir Western debate
The state’s deliberations mirror broader tensions across the West over how communities should prepare for wildfire. Specialists warn that fires beginning in wildland areas can quickly transition into urban conflagrations, leveling neighborhoods once thought safe, as seen during the 2025 Los Angeles fires. This summer, three fires in Spokane, Washington destroyed more than 800 homes across densely built areas.
Across several states, homeowners at public meetings have argued that wildfire mandates infringe on property rights, diminish urban wildlife habitat and add expensive maintenance obligations.
Opposition has had consequences. Vegetation management proposals were recently voted down in both Oregon and Washington after strong public pushback, including misinformation shared online. Some groups urged regulators to wait for additional research on fire behavior.
Evidence links nearby plants to home losses
Laboratory tests have shown that even green plants can ignite under the dry, windy conditions typical of severe wildfires. Analyses of past California incidents found that homes with vegetation concentrated within six feet of exterior walls faced a higher chance of being destroyed. Managing plants and other combustibles also creates defensible space for firefighters, improving their ability to protect structures.
California has long set the pace on wildfire policy. For nearly two decades, the state’s building code has required the use of fire-resistant materials. A handful of other states have recently adopted similar standards. Researchers say the best outcomes occur when both building materials and surrounding vegetation are addressed, and even during some of the worst recent fires, a portion of homes survived.
Officials argue that broad, enforceable rules are needed because voluntary steps fall short when neighbors do not participate. A single home with dense, dry vegetation can endanger adjacent properties. Insurers operating in the state are also required to offer discounts to homeowners who harden their homes against fire.
Inspections will shape compliance
Some wildfire experts contend the new approach still leaves risks because any combustible item close to a structure can ignite. Enforcement will fall to local fire departments and state agencies that conduct annual home inspections. Inspectors will be responsible for educating residents and ensuring compliance.
“I want the board to understand what this compromise asks of local inspection programs,” Todd Lando of the Central Marin Fire Department told the board. He said a fully clear Zone Zero would allow a quick yes-or-no assessment on whether combustibles exist within five feet, making it easier for homeowners to act. He warned that the new rules introduce more conditional judgments that could lead to disputes and hinder compliance.
State officials said inspectors will prioritize public education at the outset. For existing homes, the vegetation standards will not become mandatory until 2029 at the earliest.
More frequent and destructive disasters have also raised concerns in other parts of the country, including when a Hawaii mudslide levels homes on Big Island after Lala, highlighting how vulnerable housing can be to extreme events.