Fire hazard zones for vacant land in Altadena

Of the 5,337 vacant lots in Altadena, 1,015 (19%) are in a CAL FIRE Very High fire hazard severity zone, 0 are High and 0 are Moderate. 4,322 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 Altadena

CAL FIRE zone	Vacant lots	Share
Very High	1,015	19%
High	0	0%
Moderate	0	0%
Not in a zone	4,322	81%

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

Lots in a High or Very High fire zone in Altadena

Lowest assessed value first (25 of 1,015).

Lot	Acres	Assessed	Zone
3316 Dabney Ave5829-007-018	0.15	$8,592	Very High
474 W Loma Alta Dr5829-009-029	0.26	$8,918	Very High
4700 Risinghill Rd (end Of)5863-003-011	1.64	$9,754	Very High
338 E Loma Alta Dr5833-031-011	0.23	$10,474	Very High
440 W Loma Alta Dr5829-009-018	0.39	$12,167	Very High
306 E Loma Alta Dr5833-031-008	0.24	$12,167	Very High
225 W Loma Alta Dr5831-006-020	0.36	$12,498	Very High
421 Alta Pine Dr5833-031-018	0.34	$14,607	Very High
3485 Monterosa Dr5842-024-044	0.36	$14,758	Very High
3459 Monterosa Dr5842-024-046	0.25	$14,758	Very High
511 E Mount Curve Ave5842-024-006	0.26	$14,931	Very High
3474 Monterosa Dr5842-024-015	0.26	$14,931	Very High
531 Alta Pine Dr5842-024-011	0.25	$14,931	Very High
524 E Loma Alta Dr5842-024-040	0.25	$14,931	Very High
540 E Loma Alta Dr5842-024-041	0.25	$14,931	Very High
239 Taos Rd5831-017-029	0.29	$16,230	Very High
3450 Fair Oaks Ave5831-013-004	0.15	$16,553	Very High
3252 Dabney Ave5829-007-010	0.15	$16,952	Very High
3672 Leilani Way5831-004-018	0.2	$17,533	Very High
1421 E Palm St5844-020-003	0.04	$17,758	Very High
3990 Fair Oaks Ave5862-009-002	3.84	$19,159	Very High
3303 Alegre Ln5843-012-008	0.29	$19,491	Very High
3819 Alzada Rd5831-001-005	0.37	$19,639	Very High
3571 Canon Blvd5831-018-006	0.28	$19,639	Very High
163 E Loma Alta Dr5831-015-067	0.24	$19,639	Very High

Lots outside fire hazard zones in Altadena

Lowest assessed value first (25 of 4,322).

Lot	Acres	Assessed
3075 Calanda Ave5829-016-058	0.03	$9
604 E Las Flores Dr5841-013-030	0.12	$1,303
772 E Mariposa St Unit B5840-014-083	2.4	$2,729
772 E Mariposa St Unit C5840-014-084	2.4	$2,729
776 E Mariposa St Unit B5840-014-086	2.4	$2,729
776 E Mariposa St Unit A5840-014-087	2.4	$2,729
760 E Mariposa St No C5840-014-044	2.4	$2,734
760 E Mariposa St No C5840-014-045	2.4	$2,734
760 E Mariposa St No D5840-014-046	2.4	$2,734
770 E Mariposa St No A5840-014-047	2.4	$2,734
770 E Mariposa St No B5840-014-048	2.4	$2,734
770 E Mariposa St No C5840-014-049	2.4	$2,734
770 E Mariposa St No D5840-014-050	2.4	$2,734
770 E Mariposa St No E5840-014-051	2.4	$2,734
770 E Mariposa St No F5840-014-052	2.4	$2,734
770 E Mariposa St No G5840-014-053	2.4	$2,734
770 E Mariposa St No H5840-014-054	2.4	$2,734
782 E Mariposa St No A5840-014-055	2.4	$2,734
782 E Mariposa St No D5840-014-058	2.4	$2,734
778 E Mariposa St No A5840-014-059	2.4	$2,734
778 E Mariposa St No B5840-014-060	2.4	$2,734
778 E Mariposa St No C5840-014-061	2.4	$2,734
778 E Mariposa St Unit D5840-014-062	2.4	$2,734
774 E Mariposa St No D5840-014-063	2.4	$2,734
774 E Mariposa St No C5840-014-064	2.4	$2,734

Questions about land in Altadena

Is Altadena in a fire hazard severity zone?

1,015 of 5,337 vacant lots in Altadena are in a CAL FIRE fire hazard severity zone: 1,015 Very High, 0 High and 0 Moderate. 4,322 are outside any zone.

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

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 Altadena: all vacant land · flood zones

Sources

Counts are LandGrab's analysis of 2026 public data for vacant parcels in Los Angeles County, updated 2026-10-19. Maps change; confirm a specific lot with the county before you buy.