3831 Castle Rock Rd, Diamond Bar, CA 91765

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Off market mar 2020 for $675K

$995,542

Est. refi paymentEst. refi $4,306/mo

•

1,724

sq ft

3831 Castle Rock Rd, Diamond Bar, CA 91765

About this home

This turnkey 4 bed/2 bathroom stunner is situated on a spacious lot making it the ultimate family & entertainer's home. The first floor has two bedrooms and one bathroom perfect for in-laws or guests. Remaining bedrooms and bathroom are on the second floor. Amenities include walk in closets, wood floors, direct access garage, separate dining room, and fireplace in living room. Seller spent over $100k in upgrades to improve living comfort and significantly reduce utility costs: a paid off 35 solar panel system, 200 amp electric panel, energy efficient windows and doors, AC unit, blower and ducting with asbestos abatement in 2013. The attic space is fully accessible for your storage needs too! You'll love throwing parties as you show off the waterfall, bbq, fireplace and outdoor sitting area. Serve guests truly organic food from the 25 fruit trees & vegetable garden. Seller also designed a visually appealing yard with 25 colorful rose bushes & 25 flowering trees. All plants are well maintained with a custom sprinkler system throughout the yard. The seller already invested in the most expensive house components and improved the structural integrity for the next family’s benefit Come see your forever home in the highly desired Walnut School District.

Single-familyProperty Type

1963Year Built

7,886 sq ftLot Size

$577Est. Price/Sq.Ft.

2 car garageParking

Listed by Mike Chou •DRE #01852861 • K.W. EXECUTIVE

Bought with STEVEN TONG •DRE #02022257 • K.W. EXECUTIVE

Redfin checked: 3 minutes ago

•Source:CRMLS #CV20003438

Redfin Estimate

$995,542

$321K since sold in March 2020$22K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 4.1% higher than the average sale price ($956K) of 6 comparable homes.

SOLD OCT 31, 2025
$948,880
A
4 beds2 baths1,662 sq ft
3702 Crooked Creek Dr, Diamond Bar, CA 91765
SOLD FEB 27, 2026
$1,030,000
B
4 beds2 baths1,756 sq ft
2710 Castle Rock Rd, Diamond Bar, CA 91765
SOLD JUL 31, 2026
$875,000
C
3 beds2 baths1,300 sq ft
21245 Cold Spg, Diamond Bar, CA 91765
SOLD SEP 17, 2026
$930,000
D
3 beds2 baths1,300 sq ft
2726 Castle Rock, Diamond Bar, CA 91765
SOLD JAN 21, 2026
$980,000
E
4 beds2 baths1,288 sq ft
2819 Castle Rock, Diamond Bar, CA 91765
SOLD JUL 31, 2026
$975,000
F
3 beds2 baths1,300 sq ft
2606 Castle Rock Rd, Diamond Bar, CA 91765
Synergy Real Estate

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Earn from this home

Sell

$470,522

Est. take-home

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Refinance

Est. cash available

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Rent

$3,304/mo

Redfin rental estimate

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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

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
OPEN SUN, 3PM TO 5PM
$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
OPEN SUN, 11AM TO 3PM
$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
OPEN SUN, 1PM TO 4PM
$1,250,000
4 beds3 baths2,522 sq ft
830 Coldstream Ct, Diamond Bar, CA 91765
OPEN SUN, 2PM TO 4PM
$1,000,000
3 beds2 baths1,436 sq ft
23433 Quail Summit Dr, Diamond Bar, CA 91765
OPEN SUN, 1PM TO 4PM
$1,595,000
5 beds3 baths3,203 sq ft
1112 Summitridge, Diamond Bar, CA 91765
See all

Provided by Redfin

Sale history for 3831 Castle Rock Rd

Date

Event

Price

CRMLS #CV20003438

Mar 11, 2020

Sold

$675,000

$392/sq ft

Feb 1, 2020

Pending

—

Jan 6, 2020

Listed

$688,000

$399/sq ft

CRMLS #CV19023778

May 31, 2019

Listing Removed

—

Feb 1, 2019

Listed

$688,800

$400/sq ft

CRMLS #H12031747

Jun 14, 2012

Sold

$430,000

$249/sq ft

Apr 12, 2012

Pending

—

Apr 7, 2012

Price Changed

$425,000

$247/sq ft

Mar 9, 2012

Listed

$440,000

$255/sq ft

CRMLS #H11127868

Jan 11, 2012

Price Changed

$430,000

$249/sq ft

Jan 6, 2012

Price Changed

$445,000

$258/sq ft

Jan 5, 2012

Price Changed

$430,000

$249/sq ft

Dec 22, 2011

Price Changed

$450,000

$261/sq ft

Nov 22, 2011

Price Changed

$465,000

$270/sq ft

Oct 25, 2011

Price Changed

$470,000

$273/sq ft

Oct 20, 2011

Price Changed

$475,000

$276/sq ft

Sep 28, 2011

Listed

$489,900

$284/sq ft

CRMLS #H11082363

Aug 30, 2011

Sold

$365,000

$212/sq ft

Jul 20, 2011

Pending

—

Jun 27, 2011

Listed

$379,900

$220/sq ft

CRMLS #P726991

Aug 9, 2010

Listing Removed

—

Mar 20, 2010

Listed

$450,000

$261/sq ft

CRMLS #C07132125

Mar 7, 2008

Listing Removed

—

Feb 2, 2008

Price Changed

$425,000

$247/sq ft

Nov 14, 2007

Price Changed

$449,000

$260/sq ft

Nov 5, 2007

Price Changed

$499,000

$289/sq ft

Oct 19, 2007

Price Changed

$520,000

$302/sq ft

Sep 30, 2007

Price Changed

$555,000

$322/sq ft

Sep 8, 2007

Listed

$565,000

$328/sq ft

CRMLS #C07064494

Aug 29, 2007

Listing Removed

—

Jul 31, 2007

Price Changed

$570,000

$331/sq ft

Jul 19, 2007

Price Changed

$589,000

$342/sq ft

May 3, 2007

Listed

$599,990

$348/sq ft

CRMLS #R55656

Oct 25, 2005

Sold

$570,000

$331/sq ft

Aug 26, 2005

Listed

$585,000

$339/sq ft

Public Records

Jul 6, 2005

Sold

$520,000

$302/sq ft

CRMLS #P442259

Jul 6, 2005

Sold

$525,000

$305/sq ft

Mar 25, 2005

Listed

$519,000

$301/sq ft

CRMLS #H503285

Jul 6, 2005

Sold

$525,000

$305/sq ft

Mar 25, 2005

Listed

$519,000

$301/sq ft

Public Records

Oct 22, 1964

Sold

$21,000

$12/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$9,597 (+5.5%)

$542,664 + $195,543

$738,207

2024

$9,096 (+3.6%)

$542,664 + $195,543

$738,207

2023

$8,781 (+2.1%)

$532,024 + $191,709

$723,733

2022

$8,598 (+1.9%)

$521,593 + $187,950

$709,543

2021

$8,440 (+33.0%)

$511,366 + $184,265

$695,631

2020

$6,346 (+1.9%)

$501,340 + $180,652

$681,992

2019

$6,226 (+4.0%)

$281,305 + $220,495

$501,800

2018

$5,986 (+4.7%)

$275,790 + $216,172

$491,962

2017

$5,715 (+3.0%)

$265,082 + $207,779

$472,861

2016

$5,547 (−0.6%)

$265,082 + $207,779

$472,861

2015

$5,580 (−0.1%)

$259,885 + $203,705

$463,590

2014

$5,588 (+19.1%)

$250,968 + $196,716

$447,684

2012

$4,693 (−17.0%)

$274,380 + $164,220

$438,600

2011

$5,653 (−2.6%)

$277,100 + $87,900

$365,000

2010

$5,802 (+24.2%)

$201,506 + $251,680

$453,186

2009

$4,671 (−34.1%)

$375,400 + $98,100

$473,500

2008

$7,085

$299,300 + $78,200

$377,500

Tax history for 3831 Castle Rock Rd

Year

Property tax

Land + Additions

Assessment*

2025

$9,597 (+5.5%)

$542,664 + $195,543

$738,207

2024

$9,096 (+3.6%)

$542,664 + $195,543

$738,207

2023

$8,781 (+2.1%)

$532,024 + $191,709

$723,733

2022

$8,598 (+1.9%)

$521,593 + $187,950

$709,543

2021

$8,440 (+33.0%)

$511,366 + $184,265

$695,631

2020

$6,346 (+1.9%)

$501,340 + $180,652

$681,992

2019

$6,226 (+4.0%)

$281,305 + $220,495

$501,800

2018

$5,986 (+4.7%)

$275,790 + $216,172

$491,962

2017

$5,715 (+3.0%)

$265,082 + $207,779

$472,861

2016

$5,547 (−0.6%)

$265,082 + $207,779

$472,861

2015

$5,580 (−0.1%)

$259,885 + $203,705

$463,590

2014

$5,588 (+19.1%)

$250,968 + $196,716

$447,684

2012

$4,693 (−17.0%)

$274,380 + $164,220

$438,600

2011

$5,653 (−2.6%)

$277,100 + $87,900

$365,000

2010

$5,802 (+24.2%)

$201,506 + $251,680

$453,186

2009

$4,671 (−34.1%)

$375,400 + $98,100

$473,500

2008

$7,085

$299,300 + $78,200

$377,500

*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

7,888 Sq. Ft.

Year renovated

1963

Sq. Ft.

1,724

Year built

1963

Style

Single Family Residential

County

Los Angeles County

APN

8714017017

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 30, 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
Direct Garage Access, Driveway, Driveway - Concrete, Driveway Up Slope From Street, Garage - Single Door
Has Parking
# of Parking Spaces: 2

Interior

Laundry Information
Has Laundry
In Garage

Bathroom Information
# of Baths (Full): 2

Cooling Information
Central
Has Cooling

Room Information
Family Room, Kitchen, Main Floor Bedroom

Fireplace Information
Living Room
Has Fireplace

Flooring Information
Wood

Heating Information
Central Furnace
Has Heating

Interior Features
Levels: Two
Main Level Bathrooms: 1
Main Level Bedrooms: 2

Exterior

Exterior Information
Structure Type: House

Exterior Features
Pool Features: None
Has Sprinklers

Lot Information
Elevation Units: Feet
Lot Size Source: Assessor's Data
Lot Features: Front Yard, Garden, Sprinkler System, Sprinklers In Front, Sprinklers In Rear, Sprinklers Timer

Property Information
Total # of Units: 1
Common Walls: No Common Walls
Parcel Number: 8714017017
Total # of Stories: 2
Has View
Year Built Source: Assessor

Financial

Assesments Information
Assessments: Unknown

Utilities

Utilities Information
Sewer: Public Sewer
Water Source: District/Public

Location

Neighborhood Information
Community Features: Sidewalks, Storm Drains, Street Lighting, Suburban

School Information
High School District: Walnut Valley Unified

Location Information
Latitude: 33.96142400
Longitude: -117.85279700
Directions: Backs to S. Break Canyon Road
Zoning: LCR17500*

Public facts

Beds: 4
Baths: 2.0
Sq. Ft.: 1,724
Stories: —
Lot Size: 7,888 square feet
Style: Single Family Residential
Year Built: 1963
Year Renovated: 1963
County: Los Angeles County
APN: 8714017017

Home facts updated by county records on Aug 30, 2026

Other

Listing Information
Days Active in MLS: 26
Continuous Days Active in MLS: 26

Listing Agent Information
List Agent First Name: YING-HUEI
List Agent Last Name: CHOU

Listing Office Information
List Office Name: K.W. EXECUTIVE

Selling Agent Information
Buyer Agent First Name: STEVEN
Buyer Agent Last Name: TONG

Selling Office Information
Buyer Office Name: K.W. EXECUTIVE

Around this home

Schools

Castle Rock Elementary School

Public K-5 • Assigned • 0.9mi

10/10

South Pointe Middle School

Public 6-8 • Assigned • 2.1mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 1.6mi

10/10

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

6/10 Fire Factor

7% chance of being in a wildfire in next 30 years

6/10 Heat Factor

7 days above 99° expected this year, 20 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

7/10 Air Factor

13 unhealthy days expected this year, 14 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 9.5 hours in June and 6.9 hours in December, placing it above the U.S. average for solar exposure.

9.5 hrs

6.9 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$946,000 – $1.15M

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New listings for sale in 91765

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OPEN SUN, 3PM TO 5PM

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24215 Delta Dr, Diamond Bar, CA 91765

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22871 Hilton Head Dr #230, Diamond Bar, CA 91765

OPEN SUN, 11AM TO 3PM

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883 Terrace W, Pomona, CA 91765

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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

OPEN SUN, 1PM TO 4PM

$1,250,000

4 beds3 baths2,522 sq ft

830 Coldstream Ct, Diamond Bar, CA 91765

OPEN SUN, 2PM TO 4PM

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Home values near 3831 Castle Rock Rd

Data from public records.

Address	Redfin Estimate
3705 Castle Rock Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1724 Sq. Ft.	$949,748
3725 Castle Rock Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1448 Sq. Ft.	$845,698

Address	Redfin Estimate
3711 Castle Rock Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1521 Sq. Ft.	$862,289
3731 Castle Rock Road, Diamond Bar, CA 4 Beds \| 2 Baths \| 1724 Sq. Ft.	$988,333

Address	Redfin Estimate
3719 Castle Rock Road, Diamond Bar, CA 4 Beds \| - Baths \| 2164 Sq. Ft.	$1,020,864
3737 Castle Rock Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1521 Sq. Ft.	$893,138

Property information provided by CRMLS when last listed in 2020. 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 3831 Castle Rock Rd

Tax history for 3831 Castle Rock Rd

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 91765

Home values near 3831 Castle Rock Rd

More real estate resources