Brush Clearance: Rancho Cucamonga vs Rialto
How do brush clearance rules compare between Rancho Cucamonga, CA and Rialto, CA?
Rancho Cucamonga and Rialto have similar restriction levels.
Rancho Cucamonga, CA
San Bernardino County
Properties in or near the Very High Fire Hazard Severity Zone must clear 100 feet of defensible space under PRC 4291. Rancho Cucamonga inspects foothill parcels annually and can abate noncompliant properties.
View full Rancho Cucamonga rules →Rialto, CA
San Bernardino County
Rialto Municipal Code §15.28.060 (Vacant Lot Clearance) requires owners of vacant lots and improved parcels to clear weeds, brush, rubbish, and combustible vegetation creating a fire hazard. The Rialto Fire Department administers an annual weed abatement program; non-compliant lots are cleared by the city with costs (plus an administrative fee) becoming a lien on the property.
View full Rialto rules →Key Facts Comparison
| Fact | Rancho Cucamonga | Rialto |
|---|---|---|
| State authority | PRC 4291, 100 feet defensible space | - |
| Zone 0 (0 to 5 ft) | Ember-resistant, no combustibles (AB 3074) | - |
| Zone 1 (5 to 30 ft) | Lean, clean, green, irrigated, no dead material | - |
| Zone 2 (30 to 100 ft) | Grasses cut to 4 inches, spaced trees | - |
| Inspection program | Annual RCFPD Hazard Reduction Inspection each spring | - |
| Local code | - | Rialto Mun. Code §15.28.060 (Vacant Lot Clearance) |
| WUI defensible space | - | 100 ft. per PRC §4291 (5 / 5-30 / 30-100 zones) |
| Annual program | - | Spring weed abatement notices, ~30-day compliance |
| Forced abatement | - | City contracts cleanup + admin fee + tax lien |
| Enforcement | - | Rialto Fire Dept. + Community Compliance (909-820-8070) |
Highlighted rows indicate differences between cities.
Rancho Cucamonga FAQ
Is my property in the VHFHSZ?
Use the CAL FIRE Fire Hazard Severity Zone viewer. Most properties north of Banyan Street and in Etiwanda are in the zone, along with parcels abutting the national forest.
What happens if I miss the brush clearance deadline?
RCFPD will abate the property using a contractor and bill the owner. Unpaid bills become a lien and can be added to the property tax roll.
Is Zone 0 actively enforced in Rancho Cucamonga?
Yes. AB 3074 Zone 0 rules are being phased in statewide and RCFPD is actively educating foothill homeowners about removing combustibles within 5 feet of structures.
Rialto FAQ
When do I need to clear my vacant lot?
By the date stated in your annual weed-abatement notice from Rialto Fire (typically late spring before fire season). Vegetation must be cut to 3 inches or less and combustible debris removed.
What happens if I don't clear my lot?
The city will contract a crew to clear it at your expense, adding administrative overhead (often 25–40%) and recording a lien on your property under Gov. Code §39574.
Does PRC 4291 apply to my Rialto home?
Only if your structure is in or adjacent to a State Responsibility Area or Very High Fire Hazard Severity Zone (mainly the northern foothill / Cajon Pass overlay). Most Rialto residential parcels follow Mun. Code §15.28.060 instead.
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