21489 Cold Spring Ln, Diamond Bar, CA 91765

Off Market Jun 2010 for $655K

$1,190,316

Est. refi paymentEst. refi $3,375/mo

•

2,796

sq ft

21489 Cold Spring Ln, Diamond Bar, CA 91765

About this home

GREAT TWO STORY HOUSE IN CONVENIENT LOCATION! 3 BR/2BA+BONUS ROOM IN UPSTAIRS. 1 OFFICE ROOM IN DOWNSTAIRS. GRANITE COUNTER TOP IN KITCHEN/MASTER BATH/2ND BATH. LAMINATED WOOD FLOORS IN LIVING RM & DINING RM & FAMILY RM. TILE FLOORS IN KITCHEN & BATH ROOMS. LARGE LIVING ROOM AND DINING ROOM AREA WITH HIGH CEILING. DOUBLE ENTRY DOOR WITH BEVELED GLASS INLAY. WIDE OPEN FLOOR PLAN THROUGHOUT. HUGE BACK YARD WITH FRUIT TREES. CLOSE TO DIAMOND BAR HIGH SCHOOL. WALNUT SCHOOL DISTRICT. SOLD AS-IS CURRENT CONDITION.

Single-familyProperty Type

1977Year Built

0.31 acresLot Size

$426Est. Price/Sq.Ft.

3 car garageParking

Listed by Kenny KIM •DRE #01228233 • Masters Realty Eastern Group

Bought with Kenny KIM •DRE #01228233 • Masters Realty Eastern Group

Redfin checked: 2 minutes ago

•Source:CRMLS #H10004229

Redfin Estimate

$1,190,316

$535K since sold in June 2010$4,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 18.3% lower than the average sale price ($1.46M) of 6 comparable homes.

SOLD MAY 28, 2026
$1,505,000
A
4 beds3 baths2,712 sq ft
3249 Hawkwood Rd, Diamond Bar, CA 91765
SOLD MAY 12, 2026
$1,680,000
B
4 beds3 baths2,697 sq ft
21535 Chirping Sparrow, Diamond Bar, CA 91765
SOLD AUG 21, 2026
$1,680,000
C
5 beds3 baths3,006 sq ft
21642 High Bluff Rd, Diamond Bar, CA 91765
Century 21 Masters
SOLD JUL 9, 2026
$1,200,000
D
7 beds3 baths3,165 sq ft
3177 Hawkwood, Diamond Bar, CA 91765
SOLD MAY 14, 2026
$1,330,000
E
4 beds3 baths2,037 sq ft
3357 Bent Twig, Diamond Bar, CA 91765
SOLD JUL 10, 2026
$1,350,000
F
4 beds3 baths2,268 sq ft
1754 Leaning Pne, Diamond Bar, CA 91765

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Sell

$808,749

Est. take-home

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Est. cash available

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Rent

$3,875/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 TODAY, 1PM TO 5PM
$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 TODAY, 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 TODAY, 1AM TO 3PM
$1,690,000
4 beds3 baths2,587 sq ft
1515 Sunbluff Dr, Diamond Bar, CA 91765
OPEN TODAY, 1PM TO 4PM
$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 TODAY, 1PM TO 4PM
$1,150,000
4 beds3 baths1,747 sq ft
1036 Cogburn Ln, Diamond Bar, CA 91765
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See all

Provided by Redfin

Sale history for 21489 Cold Spring Ln

Date

Event

Price

CRMLS #H10004229

Jun 23, 2010

Sold

$655,000

$234/sq ft

Feb 25, 2010

Pending

—

Feb 10, 2010

Delisted

—

Jan 29, 2010

Price Changed

$655,000

$234/sq ft

Jan 13, 2010

Listed

$669,000

$239/sq ft

CRMLS #H08153607

Dec 8, 2008

Listing Removed

—

Nov 6, 2008

Price Changed

$675,000

$241/sq ft

Oct 27, 2008

Listed

$695,000

$249/sq ft

CRMLS #H08040377

May 25, 2008

Listing Removed

—

Apr 17, 2008

Price Changed

$788,000

$282/sq ft

Mar 18, 2008

Listed

$815,000

$291/sq ft

Public Records

Mar 24, 2006

Sold

$817,000

$292/sq ft

CRMLS #C520282

Mar 25, 2006

Sold

$824,000

$295/sq ft

Nov 2, 2005

Listed

$839,999

$300/sq ft

CRMLS #P380759

Jun 4, 2004

Sold

$639,000

$229/sq ft

Mar 3, 2004

Listed

$639,900

$229/sq ft

CRMLS #P362713

Dec 24, 2003

Listing Removed

—

Sep 24, 2003

Listed

$559,000

$200/sq ft

Public Records

Jun 3, 1986

Sold

$184,500

$66/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$10,907 (+5.6%)

$420,544 + $424,930

$845,474

2024

$10,324 (+2.4%)

$420,544 + $424,930

$845,474

2023

$10,078 (+2.1%)

$412,299 + $416,599

$828,898

2022

$9,870 (+1.9%)

$404,215 + $408,431

$812,646

2021

$9,684 (+1.3%)

$396,290 + $400,423

$796,713

2020

$9,561 (+1.9%)

$388,520 + $392,572

$781,092

2019

$9,378 (+3.8%)

$384,537 + $388,547

$773,084

2018

$9,031 (+4.8%)

$376,998 + $380,929

$757,927

2017

$8,619 (+3.1%)

$362,359 + $366,138

$728,497

2016

$8,360 (−0.6%)

$362,359 + $366,138

$728,497

2015

$8,412 (−0.1%)

$355,254 + $358,959

$714,213

2014

$8,422 (+1.0%)

$343,064 + $346,643

$689,707

2012

$8,336 (+2.9%)

$341,514 + $345,077

$686,591

2011

$8,098 (+1.8%)

$334,818 + $338,311

$673,129

2010

$7,956 (+11.1%)

$328,253 + $331,678

$659,931

2009

$7,162 (−24.3%)

$390,300 + $257,500

$647,800

2008

$9,464

$350,400 + $231,200

$581,600

Tax history for 21489 Cold Spring Ln

Year

Property tax

Land + Additions

Assessment*

2025

$10,907 (+5.6%)

$420,544 + $424,930

$845,474

2024

$10,324 (+2.4%)

$420,544 + $424,930

$845,474

2023

$10,078 (+2.1%)

$412,299 + $416,599

$828,898

2022

$9,870 (+1.9%)

$404,215 + $408,431

$812,646

2021

$9,684 (+1.3%)

$396,290 + $400,423

$796,713

2020

$9,561 (+1.9%)

$388,520 + $392,572

$781,092

2019

$9,378 (+3.8%)

$384,537 + $388,547

$773,084

2018

$9,031 (+4.8%)

$376,998 + $380,929

$757,927

2017

$8,619 (+3.1%)

$362,359 + $366,138

$728,497

2016

$8,360 (−0.6%)

$362,359 + $366,138

$728,497

2015

$8,412 (−0.1%)

$355,254 + $358,959

$714,213

2014

$8,422 (+1.0%)

$343,064 + $346,643

$689,707

2012

$8,336 (+2.9%)

$341,514 + $345,077

$686,591

2011

$8,098 (+1.8%)

$334,818 + $338,311

$673,129

2010

$7,956 (+11.1%)

$328,253 + $331,678

$659,931

2009

$7,162 (−24.3%)

$390,300 + $257,500

$647,800

2008

$9,464

$350,400 + $231,200

$581,600

*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

0.31 Acres

Year renovated

1977

Sq. Ft.

2,796

Year built

1977

Style

Single Family Residential

County

Los Angeles County

APN

8714004011

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 30, 2026.

Low Density Residential District

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

Permitted uses

Include but are not limited to:

Livestock production
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: 3

Interior

Kitchen Information
Appliances: Dishwasher, Garbage Disposal, Oven, Range
Has Appliances

Bathroom Information
# of Baths (Full): 3

Cooling Information
Central
Has Cooling

Room Information
Bonus Room, Family Room, Living Room

Fireplace Information
Living Room
Has Fireplace

Heating Information
Forced Air
Has Heating

Interior Features
Levels: Two

Exterior

Exterior Features
Pool Features: None

Lot Information
Lot Size Source: Assessor's Data
Lot Features: Treed Lot

Property Information
Living Area Source: Assessor's Data
Parcel Number: 8714004011

Financial

Assesments Information
Assessments: Unknown

Utilities

Utilities Information
Electric: 220V In Garage

Location

School Information
High School District: Walnut Valley Unified

Location Information
Latitude: 33.96786300
Longitude: -117.84061800

Public facts

Beds: 3
Baths: 3.0
Sq. Ft.: 2,796
Stories: —
Lot Size: 0.31 acres
Style: Single Family Residential
Year Built: 1977
Year Renovated: 1977
County: Los Angeles County
APN: 8714004011

Home facts updated by county records on Aug 30, 2026

Other

Listing Information
Days Active in MLS: 63
Continuous Days Active in MLS: 110

Listing Agent Information
List Agent First Name: Kenny
List Agent Last Name: Kim

Listing Office Information
List Office Name: Masters Realty Eastern Group

Selling Agent Information
Buyer Agent First Name: Kenny
Buyer Agent Last Name: Kim

Selling Office Information
Buyer Office Name: Masters Realty Eastern Group

Around this home

Schools

Castle Rock Elementary School

Public K-5 • Assigned • 0.4mi

10/10

South Pointe Middle School

Public 6-8 • Assigned • 1.7mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 0.9mi

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

1/10 Flood Factor

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

5/10 Fire Factor

5% chance of being in a wildfire in next 30 years

5/10 Heat Factor

6 days above 98° 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 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

$1.13M – $1.37M

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Home values near 21489 Cold Spring Ln

Data from public records.

Address	Redfin Estimate
21478 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 3 Baths \| 2712 Sq. Ft.	$1,336,002
21496 Cold Spring Lane, Diamond Bar, CA 4 Beds \| 3 Baths \| 2712 Sq. Ft.	$1,647,056

Address	Redfin Estimate
21502 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 3 Baths \| 2321 Sq. Ft.	$1,281,853
21494 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 2 Baths \| 2037 Sq. Ft.	$1,198,405

Address	Redfin Estimate
21498 Cold Spring Lane, Diamond Bar, CA 5 Beds \| 3 Baths \| 2796 Sq. Ft.	$1,429,924
21492 Cold Spring Lane, Diamond Bar, CA 4 Beds \| 3 Baths \| 2378 Sq. Ft.	$1,391,560

Property information provided by CRMLS when last listed in 2009. This data may not match . Learn more.

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