23308 Ridge Line Rd is a 4,075 square foot house on a 1.11 acre lot with 4 bedrooms and 4 bathrooms. Based on Redfin's Diamond Bar data, we estimate the home's value is $1,839,458.
Single-familyProperty Type
1981Year Built
1.11 acresLot Size
$451Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,839,458
$33K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.1% higher than the average sale price ($1.69M) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$10,459 (+6.6%)
$316,860 + $475,304
$792,164
2024
$9,810 (+2.9%)
$310,648 + $465,985
$776,633
2023
$9,535 (+2.6%)
$304,557 + $456,849
$761,406
2022
$9,290 (+2.0%)
$298,586 + $447,892
$746,478
2021
$9,107 (+1.3%)
$292,732 + $439,110
$731,842
2020
$8,993 (+1.9%)
$286,993 + $430,500
$717,493
2019
$8,825 (+4.9%)
$284,051 + $426,086
$710,137
2018
$8,410 (+4.7%)
$278,482 + $417,732
$696,214
2017
$8,033 (+3.3%)
$267,669 + $401,512
$669,181
2016
$7,773 (−0.6%)
$267,669 + $401,512
$669,181
2015
$7,819 (−0.6%)
$262,421 + $393,640
$656,061
2014
$7,864 (+1.1%)
$253,417 + $380,133
$633,550
2012
$7,782 (+2.9%)
$252,272 + $378,415
$630,687
2011
$7,564 (+0.1%)
$247,326 + $370,996
$618,322
2010
$7,554 (+0.9%)
$242,477 + $363,722
$606,199
2009
$7,487 (+2.6%)
$240,665 + $361,004
$601,669
2008
$7,294
$241,237 + $361,862
$603,099
Tax history for 23308 Ridge Line Rd
Year
Property tax
Land + Additions
Assessment*
2025
$10,459 (+6.6%)
$316,860 + $475,304
$792,164
2024
$9,810 (+2.9%)
$310,648 + $465,985
$776,633
2023
$9,535 (+2.6%)
$304,557 + $456,849
$761,406
2022
$9,290 (+2.0%)
$298,586 + $447,892
$746,478
2021
$9,107 (+1.3%)
$292,732 + $439,110
$731,842
2020
$8,993 (+1.9%)
$286,993 + $430,500
$717,493
2019
$8,825 (+4.9%)
$284,051 + $426,086
$710,137
2018
$8,410 (+4.7%)
$278,482 + $417,732
$696,214
2017
$8,033 (+3.3%)
$267,669 + $401,512
$669,181
2016
$7,773 (−0.6%)
$267,669 + $401,512
$669,181
2015
$7,819 (−0.6%)
$262,421 + $393,640
$656,061
2014
$7,864 (+1.1%)
$253,417 + $380,133
$633,550
2012
$7,782 (+2.9%)
$252,272 + $378,415
$630,687
2011
$7,564 (+0.1%)
$247,326 + $370,996
$618,322
2010
$7,554 (+0.9%)
$242,477 + $363,722
$606,199
2009
$7,487 (+2.6%)
$240,665 + $361,004
$601,669
2008
$7,294
$241,237 + $361,862
$603,099
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
RR
Rural Residential District
The RR zoning district identifies hillside areas intended for rural living, including the keeping of animals, with supporting accessory structures. The maximum allowed density for new residential subdivisions within this zoning district will be one dwelling unit per gross acre, or lower densities where required by chapter 22.22 (Hillside Management). The RR zoning district is consistent with the rural residential land use category of the general plan.
Permitted uses
Include but are not limited to:
Livestock production
Housing-Single unit
Housing-Senior
Housing-Other
Infrastructure
Fire house
Police station
Park & open space
Property details
Interior
Heating & Cooling
Air Conditioning Type: Central
Heating Type: Central
Exterior
Property Information
Subdivision Name: 30091
Living Sq. Ft: 4,075
# of Units: 1
Legal Description: TRACT NO 30091 LOT 102
Lot Information
# of Buildings: 1
Land Sq. Ft: 48,517
Legal Lot Number: 102
Municipality Name: DIAMOND BAR
Acres: 1.1138
Zoning Code: LCR140000*
County Use Description: SINGLE FAMILY RESID
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 4.0
Sq. Ft.: 4,075
Stories: —
Lot Size: 1.11 acres
Style: Single Family Residential
Year Built: 1981
Year Renovated: 1981
County: Los Angeles County
APN: 8713031005
Home facts updated by county records on Oct 7, 2026
Around this home
Schools
Evergreen Elementary School
Public K-5 • Assigned • 1.4mi
9/10
Chaparral Middle School
Public 6-8 • Assigned • 0.6mi
10/10
Diamond Bar High School
Public 9-12 • Assigned • 1.6mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
5/10 Fire Factor
4% chance of being in a wildfire in next 30 years
5/10 Heat Factor
4 days above 98° expected this year, 9 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
6/10 Air Factor
10 unhealthy days expected this year, 13 days in 30 years
Provided by First Street
Historical weather
Diamond Bar, CA • 91765
Average low and high temperatures (°F)
68
50
71
52
73
53
72
53
76
57
81
60
86
63
89
65
85
65
80
59
71
52
69
51
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 9.7 hours in
June and 6.9 hours in December, placing it above the
U.S. average for solar exposure.
9.7 hrs
6.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$1.75M – $2.12M
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