442 S Rock River Rd, Diamond Bar, CA 91765

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Off market mar 2012 for $320K

$826,272

Est. refi paymentEst. refi $214/mo

•

1,440

sq ft

442 S Rock River Rd, Diamond Bar, CA 91765

About this home

Beautiful Diamond Bar single family residence built 1971 that features 4 bedrooms, 3 bath with 2 car attached garage and fireplace in living room. Living space of 1.440 sqft and lotsqft of 9.117. Commuter friendly with 60 fwy and 57 fwy. Schools, parks, and services 2-3 miles. Less than a mile from Little League Field and Park. Home has recently been upgraded with new roof, new carpet, fresh paint, and etc!

Single-familyProperty Type

1971Year Built

9,120 sq ftLot Size

$574Est. Price/Sq.Ft.

2 car garageParking

Listed by ART ACOSTA •DRE #01112492 • ERA REGENCY REALTORS

Bought with Xiaodong Hu •DRE #01899345 • Coldwell Banker George Realty

Redfin checked: 2 minutes ago

•Source:CRMLS #I11027097

Redfin Estimate

$826,272

$506K since sold in March 2012$5,000 since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 12.7% lower than the average sale price ($947K) of 6 comparable homes.

SOLD AUG 26, 2026
$1,100,000
A
4 beds3 baths2,574 sq ft
559 Great Bnd, Diamond Bar, CA 91765
SOLD SEP 2, 2026
$825,000
B
4 beds2 baths1,489 sq ft
105 N Palo Cedro, Diamond Bar, CA 91765
SOLD OCT 8, 2026
$755,000
C
4 beds2 baths1,386 sq ft
22928 Beaverhead Dr, Diamond Bar, CA 91765
SOLD JUN 9, 2026
$891,000
D
4 beds2 baths1,577 sq ft
353 S Rock River Rd, Diamond Bar, CA 91765
SOLD BY REDFIN JUN 4, 2026
$1,150,000
E
4 beds3 baths2,334 sq ft
23458 Stirrup Dr, Diamond Bar, CA 91765
SOLD MAR 31, 2026
$960,000
F
4 beds2 baths1,554 sq ft
23426 Clayhorn Dr, Diamond Bar, CA 91765

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Earn from this home

Sell

$613,418

Est. take-home

List your home with Redfin and save $4,131

Refinance

Est. cash available

Get cash now or lower your monthly rate

Rent

$3,252/mo

Redfin rental estimate

List your home for rent

Market trends in 91765, CA

Last updated October 2026

Buyer's Market

Seller's Market

Balanced market

Sale-to-list price

97.1%

0.7% MoM

Median sale price

$1.1M

$19K MoM

Avg. days on market

67d

6 days MoM

Recently sold homes

11 MoM

New listings for sale

$1,450,000
3 beds3.5 baths2,716 sq ft
23843 Gold Rush Dr, Diamond Bar, CA 91765
OPEN SAT
$1,249,000
5 beds3 baths2,240 sq ft
233 N Platina, Diamond Bar, CA 91765
COMING SOON
$3,300,000
6 beds9 baths10,352 sq ft
2677 Wagon Train, Diamond Bar, CA 91765
$595,000
2 beds2 baths1,191 sq ft
1120 Cleghorn Unit C, Diamond Bar, CA 91765
LISTED BY REDFIN
$4,980,000
7 beds7.5 baths7,660 sq ft
2611 Steeplechase Ln, Diamond Bar, CA 91765
$1,079,000
4 beds3 baths2,126 sq ft
23548 Casa Loma, Diamond Bar, CA 91765
$430,000
2 beds2 baths788 sq ft
22761 Lakeway #414, Diamond Bar, CA 91765
$800,000
3 beds3 baths1,720 sq ft
2002 Silver Hawk #14, Diamond Bar, CA 91765
$438,000
2 beds2 baths934 sq ft
22820 Hilton Head #78, Diamond Bar, CA 91765
Golden Nest Realty Group
3D WALKTHROUGH
$1,150,000
5 beds3 baths2,204 sq ft
23917 Decorah, Diamond Bar, CA 91765
See all

Provided by Redfin

Sale history for 442 S Rock River Rd

Date

Event

Price

CRMLS #I11027097

Mar 7, 2012

Sold

$320,000

$222/sq ft

Jan 25, 2012

Pending

—

Jan 19, 2012

Delisted

—

Jan 9, 2012

Price Changed

$314,900

$219/sq ft

Jan 4, 2012

Relisted

—

Sep 8, 2011

Pending

—

Aug 23, 2011

Price Changed

$329,900

$229/sq ft

Jul 1, 2011

Price Changed

$369,900

$257/sq ft

Jun 20, 2011

Price Changed

$389,900

$271/sq ft

May 18, 2011

Price Changed

$399,000

$277/sq ft

Mar 2, 2011

Listed

$419,900

$292/sq ft

Public Records

Dec 17, 1976

Sold

$29,000

$20/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$5,958 (+9.3%)

$255,075 + $154,887

$409,962

2024

$5,451 (+2.8%)

$250,074 + $151,850

$401,924

2023

$5,300 (+2.6%)

$245,171 + $148,873

$394,044

2022

$5,168 (+2.3%)

$240,364 + $145,954

$386,318

2021

$5,053 (+0.4%)

$235,651 + $143,093

$378,744

2020

$5,036 (−2.3%)

$231,031 + $140,288

$371,319

2019

$5,156 (+8.9%)

$228,663 + $138,850

$367,513

2018

$4,735 (+1.8%)

$224,180 + $136,128

$360,308

2017

$4,653 (+4.6%)

$215,476 + $130,843

$346,319

2016

$4,446 (+0.8%)

$215,476 + $130,843

$346,319

2015

$4,409 (+0.6%)

$211,251 + $128,278

$339,529

2014

$4,381 (−12.4%)

$204,003 + $123,877

$327,880

2012

$5,000 (+3.1%)

$203,082 + $123,318

$326,400

2011

$4,849 (+17.0%)

$169,116 + $204,000

$373,116

2010

$4,144 (−6.8%)

$165,800 + $200,000

$365,800

2009

$4,447 (−28.2%)

$188,000 + $126,000

$314,000

2008

$6,191

$209,100 + $140,800

$349,900

Tax history for 442 S Rock River Rd

Year

Property tax

Land + Additions

Assessment*

2025

$5,958 (+9.3%)

$255,075 + $154,887

$409,962

2024

$5,451 (+2.8%)

$250,074 + $151,850

$401,924

2023

$5,300 (+2.6%)

$245,171 + $148,873

$394,044

2022

$5,168 (+2.3%)

$240,364 + $145,954

$386,318

2021

$5,053 (+0.4%)

$235,651 + $143,093

$378,744

2020

$5,036 (−2.3%)

$231,031 + $140,288

$371,319

2019

$5,156 (+8.9%)

$228,663 + $138,850

$367,513

2018

$4,735 (+1.8%)

$224,180 + $136,128

$360,308

2017

$4,653 (+4.6%)

$215,476 + $130,843

$346,319

2016

$4,446 (+0.8%)

$215,476 + $130,843

$346,319

2015

$4,409 (+0.6%)

$211,251 + $128,278

$339,529

2014

$4,381 (−12.4%)

$204,003 + $123,877

$327,880

2012

$5,000 (+3.1%)

$203,082 + $123,318

$326,400

2011

$4,849 (+17.0%)

$169,116 + $204,000

$373,116

2010

$4,144 (−6.8%)

$165,800 + $200,000

$365,800

2009

$4,447 (−28.2%)

$188,000 + $126,000

$314,000

2008

$6,191

$209,100 + $140,800

$349,900

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

Public record

Public record
Zoning

Beds

Baths

Stories

—

Lot width

—

Lot depth

—

Lot size

8,982 Sq. Ft.

Year renovated

1975

Sq. Ft.

1,440

Year built

1971

Style

Single Family Residential

County

Los Angeles County

APN

8718027020

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Oct 7, 2026.

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

Parking

Parking / Garage Information
Attached Garage
# of Garage Spaces: 2
Driveway, Garage
Has Parking

Interior

Laundry Information
Has Laundry
Area

Kitchen Information
Appliances: Dishwasher, Range
Has Appliances
Area

Bathroom Information
# of Baths (Full): 3

Cooling Information
Central
Has Cooling

Room Information
Family Room, Living Room, Primary Bedroom

Fireplace Information
Living Room
Has Fireplace

Flooring Information
Tile, Wood

Heating Information
Central Furnace
Has Heating

Interior Features
Unfurnished
Levels: One

Exterior

Exterior Information
Roof: Composition
Fencing: Blockwall
Has Fence
Construction Materials: Stucco

Exterior Features
Patio And Porch Features: Concrete
Has Patio
Pool Features: None
Has Sprinklers

Lot Information
Lot Size Source: Assessor's Data
Lot Features: Sprinklers In Front, Sprinklers In Rear, Yard

Property Information
Living Area Source: Assessor's Data
Parcel Number: 8718027020

Financial

Assesments Information
Assessments: Unknown

Utilities

Utilities Information
Sewer: Sewer Paid
Electricity Available, Sewer Connected
Water Source: District/Public

Location

Neighborhood Information
Community Features: Sidewalks

Location Information
Latitude: 34.01610600
Longitude: -117.81920700

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 1,440
Stories: —
Lot Size: 8,982 square feet
Style: Single Family Residential
Year Built: 1971
Year Renovated: 1975
County: Los Angeles County
APN: 8718027020

Home facts updated by county records on Oct 7, 2026

Other

Listing Information
Days Active in MLS: 206
Continuous Days Active in MLS: 206

Listing Agent Information
List Agent First Name: ART
List Agent Last Name: ACOSTA

Listing Office Information
List Office Name: ERA REGENCY REALTORS

Selling Agent Information
Buyer Agent First Name: Xiaodong
Buyer Agent Last Name: Hu

Selling Office Information
Buyer Office Name: Coldwell Banker George

Around this home

Schools

K - 12
Preschool & daycare

Armstrong Elementary School

Public K-6 • Assigned • 0.3mi

5/10

Lorbeer Middle School

Public 7-8 • Assigned • 0.6mi

5/10

Diamond Ranch High School

Public 9-12 • Assigned • 2.4mi

8/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Local insights from Redfin agents

The Diamond Bar market is shifting, creating new opportunities for both buyers and sellers. Buyers have a bit more negotiating room, while well-priced, well-maintained homes can still attract strong interest. If you’re considering a move, I’d be...
2 weeks ago • Diamond Bar
Sang Ur
Redfin Premier agent
124 deals
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Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

3/10 Fire Factor

0.15% chance of being in a wildfire in next 30 years

6/10 Heat Factor

7 days above 98° expected this year, 20 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

Estimated sale price

$785,000 – $951,000

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2002 Silver Hawk #14, Diamond Bar, CA 91765

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Golden Nest Realty Group

Home values near 442 S Rock River Rd

Data from public records.

Address	Redfin Estimate
469 South Rock River Rd, Diamond Bar, CA 6 Beds \| 4 Baths \| 2712 Sq. Ft.	$1,085,847
478 South Rock River Rd, Diamond Bar, CA 4 Beds \| 2 Baths \| 1476 Sq. Ft.	$839,069
462 South Rock River Rd, Diamond Bar, CA 4 Beds \| - Baths \| 1349 Sq. Ft.	$837,986
436 South Rock River Rd, Diamond Bar, CA 4 Beds \| 2 Baths \| 1476 Sq. Ft.	$859,517
418 South Rock River Rd, Diamond Bar, CA 3 Beds \| - Baths \| 1440 Sq. Ft.	$865,666
421 South Rock River Rd, Diamond Bar, CA 4 Beds \| 2 Baths \| 1476 Sq. Ft.	$863,559
439 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1541 Sq. Ft.	$909,530

Address	Redfin Estimate
475 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 2176 Sq. Ft.	$914,609
472 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1349 Sq. Ft.	$843,018
454 South Rock River Rd, Diamond Bar, CA 4 Beds \| 2 Baths \| 1828 Sq. Ft.	$981,924
430 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$841,133
414 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1740 Sq. Ft.	$841,860
427 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1440 Sq. Ft.	$863,188
445 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$873,082

Address	Redfin Estimate
484 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$724,192
466 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$857,706
448 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$866,153
424 South Rock River Rd, Diamond Bar, CA 4 Beds \| 2 Baths \| 1476 Sq. Ft.	$933,164
415 South Rock River Rd, Diamond Bar, CA 3 Beds \| 3 Baths \| 2440 Sq. Ft.	$1,033,941
433 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1541 Sq. Ft.	$853,750
408 South Rock River Rd, Diamond Bar, CA 3 Beds \| 2 Baths \| 1322 Sq. Ft.	$870,917

Property information provided by CRMLS when last listed in 2011. This data may not match . Learn more.

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 91765, CA

Sale history for 442 S Rock River Rd

Tax history for 442 S Rock River Rd

Public record

Property details

Around this home

Schools

Lifestyle

Local insights from Redfin agents

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 91765

Home values near 442 S Rock River Rd

More real estate resources