California has approved the strictest landscaping rules in the United States to cut the chance that homes ignite during extreme wildfires. The new regulations require homeowners in high-risk areas to clear most combustible plants and materials within five feet of a structure — a zone regulators call “Zone Zero.”
Under the compromise adopted by the California Board of Forestry and Fire Protection, low-growing lawns, flowers and non-woody plants up to 18 inches tall will be permitted in the five-foot zone except where they sit directly beneath a roofline. Trees can remain but must have branches trimmed back five feet from the building. The rules apply immediately to new construction and will be phased in over time for nearly two million existing homes in designated high-risk areas; enforcement for existing homes won’t begin before 2029, and officials say inspectors will emphasize education at first.
State regulators framed the changes as a response to more extreme fire behavior driven by hotter, drier conditions. Research and post-fire analyses indicate that dense, dry vegetation close to walls and eaves raises the odds a home will be lost. In extreme wind events, embers can travel far from a wildfire and ignite small fuel pockets around a house; managing plants close to buildings reduces those ignition points and creates more defensible space for firefighters.
The policy move follows years of debate. Earlier proposals that would have banned nearly all vegetation within five feet provoked community pushback over loss of greenery, habitat concerns and maintenance costs. Critics warned the rules could impose large expenses on homeowners. Opponents in public meetings across the West have argued the regulations threaten private property rights and wildlife habitat and called for more research before broad mandates.
Similar vegetation-management proposals were rejected recently in Oregon and Washington after strong public opposition and the spread of misinformation, highlighting how contentious these issues have become beyond California. Even so, state officials pointed to recent disasters — including urban and neighborhood losses in 2025 — and data showing more than 57,000 California buildings destroyed in the past decade as reasons to act now.
Scientists and fire professionals say the evidence supports limiting fuels close to structures. Laboratory and field studies show that, under extreme wildfire conditions, even live green plants can burn or transmit embers to building materials. Analyses of past California fires found homes with most vegetation concentrated within six feet of exterior walls were at higher risk of being destroyed.
California has a history of pioneering wildfire policy, including building codes that require fire-resistant materials. Regulators argue that the best protection combines resilient construction and careful vegetation management; insurance rules in the state already encourage fire-hardening, including discounts for homeowners who take mitigation steps.
Implementation will rely on local fire departments and state inspectors who already perform home evaluations. Inspectors are expected to face new judgment calls under the compromise, since the allowed vegetation exceptions create more conditional assessments than a simple clear-or-not standard. Officials say education will come first, with enforcement phased in over several years to give homeowners time to comply.
The new rules aim to make communities safer by reducing common ignition sources near houses, but they also underscore the broader tensions playing out across the Western U.S. between public safety imperatives and concerns about costs, property rights and landscape character. State leaders say the shift reflects the hard lessons of recent fire seasons and a need for consistent standards in areas most exposed to wildfire risk.