23840 Highland Valley Rd is a 1,888 square foot house on a 9,794 square foot lot with 4 bedrooms and 2 bathrooms. Based on Redfin's Diamond Bar data, we estimate the home's value is $971,089.
Single-familyProperty Type
1968Year Built
9,794 sq ftLot Size
$514Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$971,089
$12K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 4.7% lower than the average sale price ($1.02M) 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
$4,037 (+9.7%)
$84,905 + $175,868
$260,773
2024
$3,680 (+1.8%)
$83,241 + $172,420
$255,661
2023
$3,614 (+1.6%)
$81,609 + $169,040
$250,649
2022
$3,556 (+2.4%)
$80,009 + $165,726
$245,735
2021
$3,473 (+0.4%)
$78,441 + $162,477
$240,918
2020
$3,459 (−2.1%)
$76,903 + $159,292
$236,195
2019
$3,534 (+9.6%)
$76,115 + $157,659
$233,774
2018
$3,223 (+1.8%)
$74,623 + $154,568
$229,191
2017
$3,167 (+4.9%)
$71,726 + $148,567
$220,293
2016
$3,019 (+0.8%)
$71,726 + $148,567
$220,293
2015
$2,995 (+0.5%)
$70,320 + $145,654
$215,974
2014
$2,981 (+0.8%)
$67,908 + $140,657
$208,565
2012
$2,957 (+3.1%)
$67,602 + $140,022
$207,624
2011
$2,868 (+0.7%)
$66,277 + $137,277
$203,554
2010
$2,848 (+2.9%)
$64,978 + $134,586
$199,564
2009
$2,768 (+4.9%)
$64,493 + $133,581
$198,074
2008
$2,638
$64,647 + $133,899
$198,546
Tax history for 23840 Highland Valley Rd
Year
Property tax
Land + Additions
Assessment*
2025
$4,037 (+9.7%)
$84,905 + $175,868
$260,773
2024
$3,680 (+1.8%)
$83,241 + $172,420
$255,661
2023
$3,614 (+1.6%)
$81,609 + $169,040
$250,649
2022
$3,556 (+2.4%)
$80,009 + $165,726
$245,735
2021
$3,473 (+0.4%)
$78,441 + $162,477
$240,918
2020
$3,459 (−2.1%)
$76,903 + $159,292
$236,195
2019
$3,534 (+9.6%)
$76,115 + $157,659
$233,774
2018
$3,223 (+1.8%)
$74,623 + $154,568
$229,191
2017
$3,167 (+4.9%)
$71,726 + $148,567
$220,293
2016
$3,019 (+0.8%)
$71,726 + $148,567
$220,293
2015
$2,995 (+0.5%)
$70,320 + $145,654
$215,974
2014
$2,981 (+0.8%)
$67,908 + $140,657
$208,565
2012
$2,957 (+3.1%)
$67,602 + $140,022
$207,624
2011
$2,868 (+0.7%)
$66,277 + $137,277
$203,554
2010
$2,848 (+2.9%)
$64,978 + $134,586
$199,564
2009
$2,768 (+4.9%)
$64,493 + $133,581
$198,074
2008
$2,638
$64,647 + $133,899
$198,546
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
RL
Low Density Residential District
The RL zoning district is intended primarily for parcels developed with existing detached single-family dwellings. The maximum allowed density for new residential subdivisions within this zoning district will be three dwellings per gross acre. The RL zoning district is consistent with the low density 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
Heating Type: Central
Exterior
Property Information
Subdivision Name: 27537
Living Sq. Ft: 1,888
# of Units: 1
Legal Description: TRACT NO 27537 LOT 16
Lot Information
# of Buildings: 1
Land Sq. Ft: 9,794
Legal Lot Number: 16
Municipality Name: DIAMOND BAR
Acres: 0.2248
Depth Footage: 130
Front Footage: 72
Zoning Code: LCR18000*
County Use Description: SINGLE FAMILY RESID
Location Information
Parcel Location Influence: Corner
Utility Information
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 1,888
Stories: —
Lot Size: 9,794 square feet
Style: Single Family Residential
Year Built: 1968
Year Renovated: 1968
County: Los Angeles County
APN: 8706005016
Home facts updated by county records on Oct 7, 2026
Around this home
Schools
Lorbeer Middle School
Public 7-8 • Assigned • 1.3mi
5/10
Diamond Ranch High School
Public 9-12 • Assigned • 1.6mi
8/10
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
3/10 Fire Factor
0.77% chance of being in a wildfire in next 30 years
6/10 Heat Factor
6 days above 99° expected this year, 17 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 10.1 hours in
June and 6.8 hours in December, placing it above the
U.S. average for solar exposure.
10.1 hrs
6.8 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$923,000 – $1.12M
Reach more buyers when you sell with Redfin. Save up to $9,711 in fees.3 minutes to get started.