2421 Castle Rock Rd, Diamond Bar, CA 91765

Off Market Dec 2025 for $959K

$1,055,213

Est. refi paymentEst. refi $6,853/mo

•

1,300

sq ft

2421 Castle Rock Rd, Diamond Bar, CA 91765

About this home

Welcome to 2421 Castle Rock Rd, a beautifully maintained single-story pool home located in the highly sought-after Diamond Bar community. This home features a bright and functional layout with 3 bedrooms, 2 bathrooms, and an inviting backyard oasis perfect for California living. Enjoy a private pool, covered outdoor dining spaces, and plenty of room to entertain. Located in the award-winning Walnut Valley Unified School District, consistently ranked among the Top Public School Districts in California. Conveniently close to Diamond Bar High School, Evergreen Elementary, shopping centers, dining, parks, and easy access to the 57, 60 & 10 freeways. This home offers comfort, location, and lifestyle all in one. A rare opportunity in a prime neighborhood come see it today. Why this location stands out: * Located in the award-winning Walnut Valley Unified School District (one of the highest-rated in CA) * Minutes to Diamond Bar High School, Chaparral Middle, and Evergreen Elementary * Quick access to 57, 60 & 10 freeways, yet tucked away on a quiet residential street * Nearby shopping, hiking trails, Diamond Bar Center, golf course & community parks. This is the kind of home families hold onto for years peaceful, established, and convenient to everything. Property sold AS-IS.

Single-familyProperty Type

1963Year Built

8,944 sq ftLot Size

$812Est. Price/Sq.Ft.

2 car garageParking

Listed by Ashley Magallon •DRE #02214413 • eXp Realty of Greater Los Angeles

•310-597-8244 (agent)

•ashley.magallon@exprealty.com (agent)

Bought with Celin Chen •DRE #02091285 • Pinnacle Real Estate Group

Redfin checked: a minute ago

•Source:TheMLS #25613057

Redfin Estimate

$1,055,213

$96K since sold in December 2025$4,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 9.8% higher than the average sale price ($961K) of 6 comparable homes.

SOLD JUL 16, 2026
$958,600
A
3 beds2 baths1,372 sq ft
2127 Evergreen Springs Dr, Diamond Bar, CA 91765
Keller Williams Premier Prop
SOLD JUL 31, 2026
$975,000
B
3 beds2 baths1,300 sq ft
2606 Castle Rock Rd, Diamond Bar, CA 91765
Synergy Real Estate
SOLD JUL 31, 2026
$875,000
C
3 beds2 baths1,300 sq ft
21245 Cold Spg, Diamond Bar, CA 91765
SOLD FEB 26, 2026
$880,000
D
3 beds2 baths1,280 sq ft
2632 Castle Rock, Diamond Bar, CA 91765
SOLD MAY 4, 2026
$1,290,000
E
4 beds2 baths1,788 sq ft
1869 Morning Cyn, Diamond Bar, CA 91765
SOLD JUL 24, 2026
$785,000
F
3 beds2 baths1,460 sq ft
1916 Chestnut Creek Rd, Diamond Bar, CA 91765

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Earn from this home

Sell

$238,962

Est. take-home

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Refinance

Est. cash available

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Rent

$3,235/mo

Redfin rental estimate

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Market trends in 91765, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

99.1%

0.2% MoM

Median sale price

$1.1M

$48K MoM

Avg. days on market

42d

0 days MoM

Recently sold homes

108

17 MoM

New listings for sale

COMING SOON
$585,000
2 beds2.5 baths1,012 sq ft
1109 Golden Springs Dr Unit D, Diamond Bar, CA 91765
OPEN SAT, 12PM TO 4PM
$1,648,000
4 beds3 baths3,212 sq ft
3315 Hawkwood, Diamond Bar, CA 91765
First Team Real Estate
$5,380,000
6 beds7 baths9,038 sq ft
2828 Water Course Dr, Diamond Bar, CA 91765
OPEN SAT, 1PM TO 3PM
$1,199,999
4 beds2.5 baths1,915 sq ft
23308 Quail Smt, Diamond Bar, CA 91765
$818,800
3 beds3 baths1,570 sq ft
22935 Estoril Dr #6, Diamond Bar, CA 91765
OPEN SAT, 1PM TO 3PM
$1,690,000
4 beds3 baths2,587 sq ft
1515 Sunbluff Dr, Diamond Bar, CA 91765
OPEN SAT, 2PM TO 5PM
$538,000
3 beds2 baths1,047 sq ft
800 Grand Ave Unit D1, Diamond Bar, CA 91765
$1,070,000
4 beds2.5 baths1,893 sq ft
24126 Silver Spray, Diamond Bar, CA 91765
OPEN SAT, 11AM TO 2PM
$1,150,000
4 beds3 baths1,747 sq ft
1036 Cogburn Ln, Diamond Bar, CA 91765
$625,000
3 beds2.5 baths1,420 sq ft
1030 Golden Springs Dr Unit B, Diamond Bar, CA 91765
See all

Provided by Redfin

Sale history for 2421 Castle Rock Rd

Date

Event

Price

TheMLS #25613057

Dec 12, 2025

Sold

$959,000

$738/sq ft

Dec 7, 2025

Pending

—

Nov 13, 2025

Contingent

—

Nov 12, 2025

Price Changed

$959,000

$738/sq ft

Nov 11, 2025

Price Changed

$950,000

$731/sq ft

Oct 31, 2025

Listed

$915,000

$704/sq ft

CRMLS #Y45354

Jan 31, 2005

Sold

$495,000

$381/sq ft

Nov 24, 2004

Listed

$499,500

$384/sq ft

CRMLS #H415705

Dec 30, 2004

Listing Removed

—

Nov 24, 2004

Listed

$499,500

$384/sq ft

CRMLS #Y43730

Nov 24, 2004

Listing Removed

—

Sep 1, 2004

Listed

$499,500

$384/sq ft

Public Records

May 10, 1995

Sold

$178,000

$137/sq ft

Public Records

Oct 2, 1987

Sold

$131,500

$101/sq ft

Public Records

May 28, 1982

Sold

$110,500

$85/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$8,809 (+4.1%)

$537,349 + $152,623

$689,972

2024

$8,460 (+2.4%)

$537,349 + $152,623

$689,972

2023

$8,259 (+2.1%)

$526,813 + $149,631

$676,444

2022

$8,088 (+1.8%)

$516,484 + $146,698

$663,182

2021

$7,941 (+1.3%)

$506,357 + $143,822

$650,179

2020

$7,842 (+1.9%)

$496,429 + $141,002

$637,431

2019

$7,692 (+5.5%)

$491,339 + $139,557

$630,896

2018

$7,292 (+4.8%)

$481,705 + $136,821

$618,526

2017

$6,957 (+2.9%)

$463,000 + $131,509

$594,509

2016

$6,760 (+0.6%)

$463,000 + $131,509

$594,509

2015

$6,721 (+4.3%)

$453,922 + $128,931

$582,853

2014

$6,443 (+21.9%)

$413,000 + $118,000

$531,000

2012

$5,284 (+1.1%)

$340,000 + $97,000

$437,000

2011

$5,228

$330,000 + $94,300

$424,300

2010

$5,223 (−4.9%)

$330,000 + $94,300

$424,300

2009

$5,490 (−12.9%)

$330,000 + $94,300

$424,300

2008

$6,300

$350,000 + $100,000

$450,000

Tax history for 2421 Castle Rock Rd

Year

Property tax

Land + Additions

Assessment*

2025

$8,809 (+4.1%)

$537,349 + $152,623

$689,972

2024

$8,460 (+2.4%)

$537,349 + $152,623

$689,972

2023

$8,259 (+2.1%)

$526,813 + $149,631

$676,444

2022

$8,088 (+1.8%)

$516,484 + $146,698

$663,182

2021

$7,941 (+1.3%)

$506,357 + $143,822

$650,179

2020

$7,842 (+1.9%)

$496,429 + $141,002

$637,431

2019

$7,692 (+5.5%)

$491,339 + $139,557

$630,896

2018

$7,292 (+4.8%)

$481,705 + $136,821

$618,526

2017

$6,957 (+2.9%)

$463,000 + $131,509

$594,509

2016

$6,760 (+0.6%)

$463,000 + $131,509

$594,509

2015

$6,721 (+4.3%)

$453,922 + $128,931

$582,853

2014

$6,443 (+21.9%)

$413,000 + $118,000

$531,000

2012

$5,284 (+1.1%)

$340,000 + $97,000

$437,000

2011

$5,228

$330,000 + $94,300

$424,300

2010

$5,223 (−4.9%)

$330,000 + $94,300

$424,300

2009

$5,490 (−12.9%)

$330,000 + $94,300

$424,300

2008

$6,300

$350,000 + $100,000

$450,000

*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

8,944 Sq. Ft.

Year renovated

1963

Sq. Ft.

1,300

Year built

1963

Style

Single Family Residential

County

Los Angeles County

APN

8285007018

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 31, 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

Garage
Driveway, 2 Car Garage

Parking
# of Parking Spaces (Total): 2
# of Open Other Spaces: 3

Interior

Bathroom Information
# of Baths (Full): 2

Laundry Information
Laundry in Garage

Additional Rooms
Den
Sun Room, Den/Office

Fireplace Information
Gas and Wood

Flooring Information
Carpeted Floors, Wood Floors

Heating & Cooling
A/C, Central Cooling
Central Heat

Exterior

Building Information
Total Floors: 1
One Level
Detached
Detached/No Common Walls
Security Features: Carbon Monoxide Detector(s), Smoke Detector

Pool Information
In Ground Pool, Private Pool

Property Information
Property Type: Residential Single-Family

Land Information
Other Structures: None

Lot Information
Lot Size (Sq. Ft.): 8,944
Lot Size (Acres): 0.2053
Lot Size Dimensions: 80 x 112
Zoning: LCR171/2

Property Features
Has View
View: Pool, Hills

Financial

Assessment Information
Assessor Parcel Number: 8285-007-018

Location

Location Information
Directions: GOOGLE MAP.

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 1,300
Stories: —
Lot Size: 8,944 square feet
Style: Single Family Residential
Year Built: 1963
Year Renovated: 1963
County: Los Angeles County
APN: 8285007018

Home facts updated by county records on Aug 31, 2026

Other

Documents & Disclosures
Disclosures: Termite - Negotiable

Around this home

Schools

Evergreen Elementary School

Public K-5 • Assigned • 0.1mi

9/10

Chaparral Middle School

Public 6-8 • Assigned • 1.3mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 0.4mi

10/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Local insights from Redfin agents

The real estate market is becoming more balanced. Buyers have more inventory, more data, and more time to make informed decisions than they did a year ago. Well-priced homes are still moving quickly, but today’s market rewards preparation, strategy,...
2 months ago • Los Angeles County
Peter Santos
Redfin Premier agent
82 deals
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Climate risks

6/10 Flood Factor

Estimated 60-74% chance of a flood reaching the building in the next 30 years

5/10 Fire Factor

3% chance of being in a wildfire in next 30 years

6/10 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 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

$1.00M – $1.21M

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Home values near 2421 Castle Rock Rd

Data from public records.

Address	Redfin Estimate
2402 Castle Rock Road, Diamond Bar, CA 5 Beds \| 4 Baths \| 2280 Sq. Ft.	$1,151,621
2420 Castle Rock Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1315 Sq. Ft.	$954,241

Address	Redfin Estimate
2406 Castle Rock Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1909 Sq. Ft.	$1,122,047
2428 Castle Rock Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1288 Sq. Ft.	$832,746

Address	Redfin Estimate
2414 Castle Rock Road, Diamond Bar, CA 4 Beds \| 3 Baths \| 2176 Sq. Ft.	$1,009,673
2434 Castle Rock Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1315 Sq. Ft.	$928,493

Property information provided by TheMLS when last listed in 2025. 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 2421 Castle Rock Rd

Tax history for 2421 Castle Rock 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 2421 Castle Rock Rd

More real estate resources