427 S Rock River Rd, Diamond Bar, CA 91765

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Off market sep 2022 for $762K

$863,188

Est. refi paymentEst. refi $4,585/mo

•

1,440

sq ft

427 S Rock River Rd, Diamond Bar, CA 91765

About this home

Location Location Location!! For the first time in over 50 years this home in its charming original estate is on the market! Nestled in the highly sought-after neighborhood of Diamond Bar. This single-story home features 3 bedrooms and 2 bathrooms. Walking in you are welcomed into the living room with a cozy fireplace, leading your way to the formal dining room adjacent to the kitchen area, great for entertaining family and friends. Spacious master bedroom with walk-in closet and master bath. Step outside into the backyard to enjoy the garden and fruit trees. Conveniently in a centralized location nearby freeways, shopping centers, schools, parks, and a short distance to the mountains and beach. Don’t miss this great opportunity to add some love and personal touches to make it your forever home!!

Single-familyProperty Type

1971Year Built

6,775 sq ftLot Size

$599Est. Price/Sq.Ft.

2 car garageParking

Listed by LIZZETTE VARGAS •DRE #01983732 • NEST REAL ESTATE

Bought with JAVIER PACHECO •DRE #01971253 • SUPERIOR PROPERTIES GROUP

Redfin checked: 2 minutes ago

•Source:CRMLS #IV22158538

Redfin Estimate

$863,188

$101K since sold in September 2022$13K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 1% lower than the average sale price ($872K) of 6 comparable homes.

SOLD OCT 8, 2026
$755,000
A
4 beds2 baths1,386 sq ft
22928 Beaverhead Dr, 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 MAY 22, 2026
$895,000
C
3 beds2 baths1,554 sq ft
856 Golden Prados, 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 MAY 27, 2026
$900,000
E
3 beds2 baths1,553 sq ft
312 N Prospectors, Diamond Bar, CA 91765
SOLD MAY 6, 2026
$965,000
F
4 beds2 baths1,677 sq ft
409 Gunsmoke, Diamond Bar, CA 91765

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Earn from this home

Sell

$253,335

Est. take-home

List your home with Redfin and save $4,316

Refinance

Est. cash available

Get cash now or lower your monthly rate

Rent

$3,186/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 427 S Rock River Rd

Year

Property tax

Land + Additions

Assessment*

2025

$10,671 (+8.4%)

$646,911 + $161,727

$808,638

2024

$9,847 (+2.0%)

$634,227 + $158,556

$792,783

2023

$9,654 (+520.6%)

$621,792 + $155,448

$777,240

2022

$1,556 (+2.7%)

$609,600 + $152,400

$762,000

2021

$1,515 (+0.5%)

$26,300 + $60,731

$87,031

2020

$1,506 (−1.2%)

$25,785 + $59,541

$85,326

2019

$1,525 (+10.3%)

$25,521 + $58,931

$84,452

2018

$1,383 (+1.9%)

$25,021 + $57,776

$82,797

2017

$1,356 (+5.1%)

$24,050 + $55,534

$79,584

2016

$1,290 (+0.9%)

$24,050 + $55,534

$79,584

2015

$1,279

$23,579 + $54,446

$78,025

2014

$1,278 (+1.8%)

$22,771 + $52,579

$75,350

2012

$1,256 (+3.2%)

$22,669 + $52,342

$75,011

2011

$1,217 (+1.1%)

$22,225 + $51,316

$73,541

2010

$1,204 (+3.4%)

$21,790 + $50,310

$72,100

2009

$1,165 (+5.3%)

$21,628 + $49,934

$71,562

2008

$1,106

$21,680 + $50,053

$71,733

Tax history for 427 S Rock River Rd

Year

Property tax

Land + Additions

Assessment*

2025

$10,671 (+8.4%)

$646,911 + $161,727

$808,638

2024

$9,847 (+2.0%)

$634,227 + $158,556

$792,783

2023

$9,654 (+520.6%)

$621,792 + $155,448

$777,240

2022

$1,556 (+2.7%)

$609,600 + $152,400

$762,000

2021

$1,515 (+0.5%)

$26,300 + $60,731

$87,031

2020

$1,506 (−1.2%)

$25,785 + $59,541

$85,326

2019

$1,525 (+10.3%)

$25,521 + $58,931

$84,452

2018

$1,383 (+1.9%)

$25,021 + $57,776

$82,797

2017

$1,356 (+5.1%)

$24,050 + $55,534

$79,584

2016

$1,290 (+0.9%)

$24,050 + $55,534

$79,584

2015

$1,279

$23,579 + $54,446

$78,025

2014

$1,278 (+1.8%)

$22,771 + $52,579

$75,350

2012

$1,256 (+3.2%)

$22,669 + $52,342

$75,011

2011

$1,217 (+1.1%)

$22,225 + $51,316

$73,541

2010

$1,204 (+3.4%)

$21,790 + $50,310

$72,100

2009

$1,165 (+5.3%)

$21,628 + $49,934

$71,562

2008

$1,106

$21,680 + $50,053

$71,733

*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

6,777 Sq. Ft.

Year renovated

1971

Sq. Ft.

1,440

Year built

1971

Style

Single Family Residential

County

Los Angeles County

APN

8718028009

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
# of Parking Spaces: 2

Interior

Laundry Information
Has Laundry
Individual Room

Kitchen Information
Appliances: Dishwasher, Gas Range
Has Appliances
Formal Dining Room, In Kitchen

Bathroom Information
# of Baths (Full): 2
Shower, Shower in Tub, Main Floor Full Bath

Cooling Information
Central
Has Cooling

Room Information
Kitchen, Laundry, Living Room, Primary Bathroom, Primary Bedroom

Fireplace Information
Living Room
Has Fireplace

Flooring Information
Carpet, Vinyl

Heating Information
Central Furnace
Has Heating

Interior Features
Levels: One
Main Level Bathrooms: 2
Main Level Bedrooms: 3

Exterior

Exterior Information
Structure Type: House

Exterior Features
Patio And Porch Features: Deck
Has Patio
Pool Features: None

Lot Information
Elevation Units: Feet
Lot Size Source: Assessor's Data
Lot Features: 0-1 Unit/Acre

Property Information
Total # of Units: 1
Common Walls: No Common Walls
Living Area Source: Assessor's Data
Parcel Number: 8718028009
Has View
Year Built Source: Assessor

Financial

Assesments Information
Assessments: Unknown

Utilities

Utilities Information
Sewer: Public Sewer
Cable Available, Electricity Available, Natural Gas Available, Sewer Available
Water Source: District/Public

Location

Neighborhood Information
Community Features: Curbs, Sidewalks

School Information
High School District: Pomona Unified

Location Information
Latitude: 34.01670400
Longitude: -117.81913300
Directions: 60 freeway, exit Diamond Bar Blvd, right prospector rd, and left on S Rock River Rd.

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 1,440
Stories: —
Lot Size: 6,777 square feet
Style: Single Family Residential
Year Built: 1971
Year Renovated: 1971
County: Los Angeles County
APN: 8718028009

Home facts updated by county records on Oct 7, 2026

Other

Listing Information
Days Active in MLS: 6
Continuous Days Active in MLS: 6

Listing Agent Information
List Agent First Name: LIZZETTE
List Agent Last Name: VARGAS

Listing Office Information
List Office Name: NEST REAL ESTATE

Selling Agent Information
Buyer Agent First Name: JAVIER
Buyer Agent Last Name: PACHECO

Selling Office Information
Buyer Office Name: SUPERIOR PROPERTIES GROUP

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

7/10 Heat Factor

7 days above 98° expected this year, 21 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

$821,000 – $993,000

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Home values near 427 S Rock River Rd

Data from public records.

Address	Redfin Estimate
448 S Rock River Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$866,153
430 S Rock River Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$841,133
414 S Rock River Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1740 Sq. Ft.	$819,837
433 S Rock River Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1541 Sq. Ft.	$853,750
402 S Rock River Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1280 Sq. Ft.	$692,685
415 S Palo Cedro Drive, Diamond Bar, CA 3 Beds \| 2 Baths \| 1541 Sq. Ft.	$867,743
433 S Palo Cedro Drive, Diamond Bar, CA 3 Beds \| - Baths \| 1500 Sq. Ft.	$883,215

Address	Redfin Estimate
442 S Rock River Road, Diamond Bar, CA 4 Beds \| 3 Baths \| 1440 Sq. Ft.	$826,272
424 S Rock River Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1476 Sq. Ft.	$933,164
415 S Rock River Road, Diamond Bar, CA 3 Beds \| 3 Baths \| 2440 Sq. Ft.	$1,033,941
439 S Rock River Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1541 Sq. Ft.	$909,530
408 S Rock River Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1322 Sq. Ft.	$870,917
421 S Palo Cedro Drive, Diamond Bar, CA 4 Beds \| 2 Baths \| 1476 Sq. Ft.	$887,421
439 S Palo Cedro Drive, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$864,374

Address	Redfin Estimate
436 S Rock River Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1476 Sq. Ft.	$859,517
418 S Rock River Road, Diamond Bar, CA 3 Beds \| - Baths \| 1440 Sq. Ft.	$865,666
421 S Rock River Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1476 Sq. Ft.	$863,559
445 S Rock River Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$873,082
409 S Palo Cedro Drive, Diamond Bar, CA 3 Beds \| 2 Baths \| 1391 Sq. Ft.	$849,029
427 S Palo Cedro Drive, Diamond Bar, CA 3 Beds \| 2 Baths \| 1680 Sq. Ft.	$902,729
443 S Palo Cedro Drive, Diamond Bar, CA 2 Beds \| 1 Baths \| 1416 Sq. Ft.	$769,400

Property information provided by CRMLS when last listed in 2022. This data may not match . Learn more.

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About this home

Redfin Estimate

Earn from this home

Market trends in 91765, CA

Sale history for 427 S Rock River Rd

Tax history for 427 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 427 S Rock River Rd

More real estate resources