The Zone 0 Courtyard

The California Board of Forestry approved the Zone 0 rules on 2026-08-19. Within 5 ft of a structure they require removal of combustible mulch, firewood and dead vegetation and prohibit new combustible fencing (the Board of Forestry Zone 0 regulations, August 2026).

The rules apply to qualifying structures in State Responsibility Areas and in Very High Fire Hazard Severity Zones in local areas (the California Wildfire and Forest Resilience Task Force).

The rules take effect for new construction once they are filed with the Office of Administrative Law and phase in later for existing homes. The filing date is unconfirmed until the Office confirms it (the Board of Forestry Zone 0 regulations, August 2026; the California Wildfire and Forest Resilience Task Force).

The Very High Fire Hazard Severity Zone is a fire district, and buildings and structures in any fire hazard severity zone follow the California Wildland-Urban Interface Code (Los Angeles Municipal Code 91.7201). We claim no protection from any paint, lime wash or coating.

A Forest Products Laboratory study found that charring wood siding, a process called shou sugi ban, did not systematically improve the flammability or durability of the siding (USDA Forest Products Laboratory).

Roman builders burned limestone into lime and slaked it for mortar and plaster. Lime plaster and lime wash are mineral coats that carry color and texture, and the courtyard borrows that coat for the walls that meet the band. The coat carries no protection claim.

Inca masons fitted each stone to its neighbors. The courtyard floor keeps that habit: cut stone laid tight on a prepared base, with the joints filled with fine gravel.

Mayan builders burned lime and surfaced their buildings in lime plaster and stucco. The courtyard keeps its planting in mineral beds of gravel and crushed stone, with any live plant inside the band placed only where the Zone 0 text allows it.

A survey of the five-foot band, measured from the exterior wall, the roof edge and any attached deck, stairs or pergola, or to the property line where that is closer (the Board of Forestry Zone 0 regulations, August 2026).

A stone, gravel or paver surface across the band, laid on a prepared base.

Mineral planting beds of gravel and crushed stone, with live, watered plants only where the Zone 0 rules allow them inside the band.

Removal of combustible mulch, stored firewood and dead vegetation from the band.

Metal or masonry fence and gate runs where a fence crosses the band.

Permit and plan-check work, with sealed plans where LADBS requires them (LADBS bulletin P/BC 2026-073).

A written list of every material used in the band.

No fire rating. We rate no surface, wall or yard for fire, and we state nothing about how a material behaves in a fire.

No claim of wildfire protection. We do not call the courtyard, the house or any material resistant to wildfire or to embers, and we do not call any of it safe from fire.

No protection from coatings. Paint, lime wash and other surface treatments carry color and texture only. We make no protection claim for any of them.

No charred wood sold as protection. Charring wood siding did not systematically improve flammability (USDA Forest Products Laboratory).

No promise about dates. The effective date of the Zone 0 rules is unconfirmed until the filing is confirmed.

No promise that a house qualifies. Whether a house falls under Zone 0 depends on its location. We read the location at the site walk.