Fire hazard zones for vacant land in Diamond Bar

Of the 31 vacant lots in Diamond Bar, 5 (16%) are in a CAL FIRE Very High fire hazard severity zone, 0 are High and 0 are Moderate. 26 are outside any zone. In High and Very High zones, sellers of property with buildings must show a defensible space inspection, and new homes must meet California's wildfire building standards.

Fire hazard zones in Diamond Bar

CAL FIRE zone	Vacant lots	Share
Very High	5	16%
High	0	0%
Moderate	0	0%
Not in a zone	26	84%

What the zones mean for buyers: fire hazard zones explained.

Lots in a High or Very High fire zone in Diamond Bar

Lowest assessed value first.

Lot	Acres	Assessed	Zone
2803 Oak Knoll Dr8713-022-063	0.23	$44,838	Very High
22455 Ridge Line Rd8713-006-018	1.66	$62,345	Very High
3159 Windmill Dr8713-021-040	0.32	$375,133	Very High
22939 Ridge Line Rd8713-005-008	1.54	$701,908	Very High
23509 Ridge Line Rd8713-004-004	1.59	$1,223,807	Very High

Lots outside fire hazard zones in Diamond Bar

Lowest assessed value first (25 of 26).

Lot	Acres	Assessed
540 Navajo Springs Rd8703-017-006	1.32	$9
1010 Overlook Ridge Rd8706-012-001	0.67	$9
970 Sunnyhill Pl8701-043-028	0.31	$5,181
24210 Peak Ct8701-020-020	0.02	$9,358
24218 Peak Ct8701-020-018	0.08	$14,470
22845 Rio Lobos Rd8717-030-078	0.18	$14,759
23528 Grand Rim Ct8701-026-045	0.21	$17,800
23751 Gold Rush Dr8701-023-024	0.23	$21,901
24388 Nan Ct8701-046-017	0.04	$34,844
1523 Kiowa Crest Dr8293-038-015	0.42	$53,780
23737 Gold Rush Dr8701-023-021	0.12	$55,409
1519 Kiowa Crest Dr8293-038-013	0.38	$104,040
2809 Oak Knoll Dr8713-022-062	0.2	$156,761
1015 Banner Ridge Rd8701-025-029	0.34	$275,400
1261 Brea Canyon Rd8763-004-003	1.19	$365,739
21095 Golden Springs Dr8763-007-027	0.29	$556,377
2887 Shadow Canyon Rd8713-018-034	1.01	$1,387,200
2875 S Diamond Bar Blvd8285-020-007	0.4	$1,513,918
24074 Falcons View Dr8713-041-015	1.1	$1,699,417
527 Grand Ave8719-020-008	1.12	$1,959,012
2769 Wagon Train Ln8713-013-008	0.55	$4,004,480
525 Grand Ave8719-020-001	2.1	$4,597,320
738 Pantera Dr8701-006-901	20.43	—
22555 Sunset Crossing Rd8718-005-901	1.7	—
20480 Pathfinder Rd8269-035-900	1.21	—

Questions about land in Diamond Bar

Is Diamond Bar in a fire hazard severity zone?

5 of 31 vacant lots in Diamond Bar are in a CAL FIRE fire hazard severity zone: 5 Very High, 0 High and 0 Moderate. 26 are outside any zone.

What does a Very High fire zone mean for land in Diamond Bar?

The seller must disclose it, owners must keep defensible space cleared around buildings, and a new home must meet California's wildfire building standards (Building Code Chapter 7A). Get insurance quotes before you buy.

More for Diamond Bar: all vacant land · flood zones

Sources

Counts are LandGrab's analysis of 2026 public data for vacant parcels in Los Angeles County, updated 2026-10-18. Maps change; confirm a specific lot with the county before you buy.