OFF MARKET

Off market jul 1986 for $1.6M

—

Est. refi paymentEst. refi $10,502/mo

•

32 ba

•

20,640

sq ft

23750 Highland Valley Rd, Diamond Bar, CA 91765

About this home

23750 Highland Valley Rd is a 20,640 square foot multi-family home on a 8.45 acre lot with 48 bedrooms and 32 bathrooms. - it last sold on July 31, 1986 for $1,600,000.

Multi-familyProperty Type

1989Year Built

8.45 acresLot Size

$78Price/Sq.Ft.

Source:Public Records

Redfin Estimate

There isn’t enough information to generate an accurate estimate at this time. Learn More

Market trends in 91765, CA

Last updated September 2026

Buyer's Market

Seller's Market

Balanced market

Sale-to-List Price

98.5%

0.6% MoM

Median sale price

$1.1M

$10K MoM

Avg. days on market

43d

1 days MoM

Recently sold homes

100

5 MoM

New listings for sale

NEW 29 MINS AGO
$4,000,000
6 beds5 baths5,797 sq ft
1809 Diamond Knl, Diamond Bar, CA 91765
NEW 21 HRS AGO
$1,480,000
5 beds3 baths2,447 sq ft
1667 Cypress Grove Ln, Diamond Bar, CA 91765
$1,170,000
4 beds2.5 baths2,154 sq ft
1029 Twin Cyn, Diamond Bar, CA 91765
FOR SALE BY OWNER
$1,200,000
3 beds2 baths1,339 sq ft
512 Armitos Pl, Diamond Bar, CA 91765
COMING SOON
$899,000
3 beds2 baths1,274 sq ft
22922 Dry Crk, Diamond Bar, CA 91765
$1,499,900
5 beds3 baths3,203 sq ft
24215 Delta Dr, Diamond Bar, CA 91765
$468,000
2 beds2.5 baths1,056 sq ft
22871 Hilton Head Dr #230, Diamond Bar, CA 91765
$1,363,000
4 beds5 baths2,430 sq ft
883 Terrace W, Pomona, CA 91765
$1,050,000
4 beds2 baths1,859 sq ft
23547 Decorah, Diamond Bar, CA 91765
$1,080,000
4 beds2 baths1,600 sq ft
239 N Palo Cedro, Diamond Bar, CA 91765
See all

Provided by Redfin

Sale history for 23750 Highland Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$40,214 (+9.5%)

$9,566,110 + $9,589,110

$19,155,220

2024

$36,710 (+1.0%)

$9,566,110 + $9,589,110

$19,155,220

2023

$36,350 (+1.7%)

$9,378,540 + $9,402,240

$18,780,780

2022

$35,741 (−0.7%)

$9,194,648 + $9,218,348

$18,412,996

2021

$35,978 (+4.4%)

$9,014,361 + $9,038,061

$18,052,422

2020

$34,451 (+1.3%)

$8,837,609 + $8,860,325

$17,697,934

2019

$34,024 (−0.8%)

$8,746,991 + $8,770,707

$17,517,698

2018

$34,281 (−5.9%)

$8,575,482 + $8,587,825

$17,163,307

2017

$36,433 (−83.6%)

$8,242,487 + $8,242,487

$16,484,974

2016

$222,776 (+521.2%)

$8,242,487 + $8,242,487

$16,484,974

2015

$35,860 (−2.5%)

$8,080,870 + $8,080,870

$16,161,740

2014

$36,767 (+14.0%)

$7,803,573 + $7,803,573

$15,607,146

2012

$32,256 (−0.5%)

$7,768,305 + $7,768,305

$15,536,610

2011

$32,429 (+1.1%)

$7,615,986 + $7,615,986

$15,231,972

2010

$32,083 (−2.0%)

$7,466,653 + $7,466,653

$14,933,306

2009

$32,747 (−83.1%)

$7,410,850 + $7,410,850

$14,821,700

2008

$194,269

$7,428,456 + $7,428,456

$14,856,912

Tax history for 23750 Highland Valley Rd

Year

Property tax

Land + Additions

Assessment*

2025

$40,214 (+9.5%)

$9,566,110 + $9,589,110

$19,155,220

2024

$36,710 (+1.0%)

$9,566,110 + $9,589,110

$19,155,220

2023

$36,350 (+1.7%)

$9,378,540 + $9,402,240

$18,780,780

2022

$35,741 (−0.7%)

$9,194,648 + $9,218,348

$18,412,996

2021

$35,978 (+4.4%)

$9,014,361 + $9,038,061

$18,052,422

2020

$34,451 (+1.3%)

$8,837,609 + $8,860,325

$17,697,934

2019

$34,024 (−0.8%)

$8,746,991 + $8,770,707

$17,517,698

2018

$34,281 (−5.9%)

$8,575,482 + $8,587,825

$17,163,307

2017

$36,433 (−83.6%)

$8,242,487 + $8,242,487

$16,484,974

2016

$222,776 (+521.2%)

$8,242,487 + $8,242,487

$16,484,974

2015

$35,860 (−2.5%)

$8,080,870 + $8,080,870

$16,161,740

2014

$36,767 (+14.0%)

$7,803,573 + $7,803,573

$15,607,146

2012

$32,256 (−0.5%)

$7,768,305 + $7,768,305

$15,536,610

2011

$32,429 (+1.1%)

$7,615,986 + $7,615,986

$15,231,972

2010

$32,083 (−2.0%)

$7,466,653 + $7,466,653

$14,933,306

2009

$32,747 (−83.1%)

$7,410,850 + $7,410,850

$14,821,700

2008

$194,269

$7,428,456 + $7,428,456

$14,856,912

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Zoning

RLM

Low/Medium Density Residential District

The RLM zoning district is intended primarily for existing subdivided areas developed with detached single-family dwellings. The maximum allowed density for new residential subdivisions within this zoning district will be five dwellings per gross acre. The RLM zoning district is consistent with the low density residential land use category of the general plan.

Permitted uses

Include but are not limited to:

Housing-Single unit
Housing-Senior
Housing-Other
Infrastructure
Fire house
Police station
Park & open space

Property details

Interior

Heating & Cooling
Air Conditioning Type: Central

Exterior

Pool Information
Has Pool

Property Information
Subdivision Name: 34803
Building Sq. Ft: 20,640
# of Units: 149
Legal Description: TR=34803 THAT POR IN TRA 10018 OF LOT 19

Lot Information
# of Buildings: 5
Land Sq. Ft: 367,956
Legal Lot Number: 19
Municipality Name: DIAMOND BAR
Acres: 8.4471
Zoning Code: LCCM*
County Use Description: APARTMENT

Financial

Assessor Information
Assessment Year: 2025

Public facts

Beds: 48
Baths: 32.0
Sq. Ft.: 20,640
Stories: —
Lot Size: 8.45 acres
Style: Multi-Family (5+ Unit)
Year Built: 1989
Year Renovated: —
County: Los Angeles County
APN: 8706002023

Home facts updated by county records on Aug 30, 2026

Around this home

Schools

Lorbeer Middle School

Public 7-8 • Assigned • 1.2mi

5/10

Diamond Ranch High School

Public 9-12 • Assigned • 1.7mi

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

2/10 Fire Factor

0.00% 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)

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

Is this your home?

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COMING SOON

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Home values near 23750 Highland Valley Rd

Data from public records.

Address	Redfin Estimate
23761 Highland Valley Rd Apartment 11, Diamond Bar, CA 2 Beds \| 2 Baths \| 1241 Sq. Ft.	$600,132
23757 Highland Valley Rd, Diamond Bar, CA 2 Beds \| 1.5 Baths \| 1241 Sq. Ft.	$543,394

Address	Redfin Estimate
23767 Highland Valley Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1349 Sq. Ft.	$622,752
23741 Highland Valley Rd, Diamond Bar, CA 2 Beds \| 1.5 Baths \| 1241 Sq. Ft.	$559,860

Address	Redfin Estimate
23751 Highland Valley Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1349 Sq. Ft.	$603,297
23737 Highland Valley Rd, Diamond Bar, CA 2 Beds \| - Baths \| - Sq. Ft.	$543,948

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Market trends in 91765, CA

Sale history for 23750 Highland Valley Rd

Tax history for 23750 Highland Valley Rd

Zoning

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Is this your home?

Nearby similar homes

New listings for sale in 91765

Home values near 23750 Highland Valley Rd

More real estate resources