21498 Cold Spring Ln, Diamond Bar, CA 91765

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Off market nov 2009 for $675K

$1,390,917

Est. refi paymentEst. refi $4,568/mo

•

2,796

sq ft

21498 Cold Spring Ln, Diamond Bar, CA 91765

About this home

Single-familyProperty Type

1977Year Built

0.5 acresLot Size

$497Est. Price/Sq.Ft.

3 car garageParking

Listed by Veronica Ryu •DRE #01492709 • Coldwell Banker Tri-Counties R

Listed by Wayne Adams •DRE #01793989 • Coldwell Banker Tri-Counties R

Bought with Mauricio Rodriguez •DRE #01769593 • KW Vision

Redfin checked: 4 minutes ago

•Source:CRMLS #H09083349

Redfin Estimate

$1,390,917

$716K since sold in November 2009$33K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 8.3% lower than the average sale price ($1.52M) of 6 comparable homes.

SOLD SEP 28, 2026
$1,380,000
A
4 beds3 baths2,712 sq ft
21504 Cold Spring Ln, Diamond Bar, CA 91765
SOLD AUG 21, 2026
$1,680,000
B
5 beds3 baths3,006 sq ft
21642 High Bluff Rd, Diamond Bar, CA 91765
Century 21 Masters
SOLD MAY 28, 2026
$1,505,000
C
4 beds3 baths2,712 sq ft
3249 Hawkwood Rd, Diamond Bar, CA 91765
SOLD SEP 4, 2026
$1,265,000
D
4 beds2.5 baths2,640 sq ft
3106 Cherrydale, Diamond Bar, CA 91765
New Star Realty & Inv.
SOLD JUL 17, 2026
$1,589,000
E
4 beds2.5 baths2,805 sq ft
21040 Ambushers, Diamond Bar, CA 91765
New Star Realty & Inv.
SOLD MAY 12, 2026
$1,680,000
F
4 beds3 baths2,697 sq ft
21535 Chirping Sparrow, Diamond Bar, CA 91765

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Earn from this home

Sell

$1,000,487

Est. take-home

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Refinance

Est. cash available

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Rent

$4,045/mo

Redfin rental estimate

List your home for rent

Market trends in 91765, CA

Last updated September 2026

Buyer's Market

Seller's Market

Balanced market

Sale-to-list price

97.8%

0.8% MoM

Median sale price

$1.1M

$12K MoM

Avg. days on market

61d

18 days MoM

Recently sold homes

3 MoM

New listings for sale

COMING SOON
$849,900
3 beds2 baths1,553 sq ft
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OPEN TODAY, 1PM TO 4PM
$750,000
4 beds3 baths1,619 sq ft
2119 Dublin Ln #2, Diamond Bar, CA 91765
$399,000
2 beds1 bath850 sq ft
22801 Hilton Head Dr #17, Diamond Bar, CA 91765
$399,000
2 beds1 bath850 sq ft
22804 Hilton Head Dr #40, Diamond Bar, CA 91765
Pinnacle Real Estate Group
OPEN TODAY, 12PM TO 3PM
$1,175,000
4 beds2.5 baths1,829 sq ft
21116 Silver Cloud, Diamond Bar, CA 91765
OPEN SUN, 2PM TO 4PM
$1,100,000
4 beds2 baths1,662 sq ft
3716 Crooked Crk, Diamond Bar, CA 91765
$4,200,000
5 beds6 baths6,257 sq ft
2945 Steeplechase, Diamond Bar, CA 91765
OPEN TODAY TO 3PM
$1,128,800
4 beds2 baths1,994 sq ft
1160 N Del Sol, Diamond Bar, CA 91765
Synergy Real Estate
OPEN TODAY, 1PM TO 4PM
$555,000
2 beds1 bath914 sq ft
21755 Laurelrim Unit B, Diamond Bar, CA 91765
Aramis Realty Group Inc.
$3,070,000
6 beds8 baths7,884 sq ft
23240 Ridge Line, Diamond Bar, CA 91765
See all

Provided by Redfin

Sale history for 21498 Cold Spring Ln

Date

Event

Price

CRMLS #TR26044542

Mar 24, 2026

Rental Removed

$4,400

$2/sq ft

Mar 2, 2026

Listed for Rent

$4,400

$2/sq ft

CRMLS #H09083349

Nov 24, 2009

Sold

$675,000

$241/sq ft

Nov 10, 2009

Pending

—

Nov 10, 2009

Relisted

—

Nov 9, 2009

Listing Removed

—

Nov 6, 2009

Relisted

—

Sep 4, 2009

Listing Removed

—

Aug 1, 2009

Listed

$639,900

$229/sq ft

CRMLS #H09048968

Aug 4, 2009

Listing Removed

—

May 1, 2009

Listed

$639,900

$229/sq ft

CRMLS #P655300

Dec 2, 2008

Listing Removed

—

Sep 29, 2008

Listing Removed

—

Sep 12, 2008

Listing Removed

—

Sep 9, 2008

Listed

$650,000

$232/sq ft

CRMLS #C401829

May 20, 2004

Sold

$695,000

$249/sq ft

Feb 6, 2004

Listed

$694,900

$249/sq ft

Public Records

Feb 19, 2002

Sold

$403,000

$144/sq ft

Public Records

Dec 28, 1977

Sold

$119,000

$43/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$11,371 (+5.7%)

$453,704 + $435,010

$888,714

2024

$10,753 (+2.9%)

$444,808 + $426,481

$871,289

2023

$10,451 (+2.6%)

$436,087 + $418,119

$854,206

2022

$10,186 (+1.9%)

$427,537 + $409,921

$837,458

2021

$9,995 (+1.3%)

$419,154 + $401,884

$821,038

2020

$9,869 (+1.9%)

$410,936 + $394,004

$804,940

2019

$9,681 (+4.0%)

$406,723 + $389,964

$796,687

2018

$9,306 (+4.8%)

$398,749 + $382,318

$781,067

2017

$8,881 (+3.1%)

$383,266 + $367,473

$750,739

2016

$8,616 (−0.6%)

$383,266 + $367,473

$750,739

2015

$8,670 (−0.2%)

$375,751 + $360,268

$736,019

2014

$8,684 (+1.0%)

$362,858 + $347,906

$710,764

2012

$8,596 (+2.9%)

$361,219 + $346,334

$707,553

2011

$8,351 (+0.7%)

$354,137 + $339,544

$693,681

2010

$8,291 (+14.1%)

$347,194 + $332,887

$680,081

2009

$7,264 (−19.2%)

$344,600 + $330,400

$675,000

2008

$8,993

$257,100 + $338,500

$595,600

Tax history for 21498 Cold Spring Ln

Year

Property tax

Land + Additions

Assessment*

2025

$11,371 (+5.7%)

$453,704 + $435,010

$888,714

2024

$10,753 (+2.9%)

$444,808 + $426,481

$871,289

2023

$10,451 (+2.6%)

$436,087 + $418,119

$854,206

2022

$10,186 (+1.9%)

$427,537 + $409,921

$837,458

2021

$9,995 (+1.3%)

$419,154 + $401,884

$821,038

2020

$9,869 (+1.9%)

$410,936 + $394,004

$804,940

2019

$9,681 (+4.0%)

$406,723 + $389,964

$796,687

2018

$9,306 (+4.8%)

$398,749 + $382,318

$781,067

2017

$8,881 (+3.1%)

$383,266 + $367,473

$750,739

2016

$8,616 (−0.6%)

$383,266 + $367,473

$750,739

2015

$8,670 (−0.2%)

$375,751 + $360,268

$736,019

2014

$8,684 (+1.0%)

$362,858 + $347,906

$710,764

2012

$8,596 (+2.9%)

$361,219 + $346,334

$707,553

2011

$8,351 (+0.7%)

$354,137 + $339,544

$693,681

2010

$8,291 (+14.1%)

$347,194 + $332,887

$680,081

2009

$7,264 (−19.2%)

$344,600 + $330,400

$675,000

2008

$8,993

$257,100 + $338,500

$595,600

*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

0.52 Acres

Year renovated

1977

Sq. Ft.

2,796

Year built

1977

Style

Single Family Residential

County

Los Angeles County

APN

8714002005

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Oct 7, 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
# of Garage Spaces: 3

Interior

Laundry Information
Has Laundry
Area

Kitchen Information
Appliances: Dishwasher, Microwave, Oven, Stove
Has Appliances

Bathroom Information
# of Baths (Full): 3

Cooling Information
Central
Has Cooling

Room Information
Family Room, Living Room, Separate Family Room

Fireplace Information
Family Room
Has Fireplace

Flooring Information
Wood

Interior Features
Levels: Two

Exterior

Exterior Information
Has Fence

Exterior Features
Pool Features: None

Lot Information
Lot Size Source: Assessor's Data

Property Information
Living Area Source: Assessor's Data
Parcel Number: 8714002005
Has View

Location

School Information
High School District: Walnut Valley Unified

Location Information
Latitude: 33.96701100
Longitude: -117.84065500
Directions: google please

Public facts

Beds: 3
Baths: 3.0
Sq. Ft.: 2,796
Stories: —
Lot Size: 0.52 acres
Style: Single Family Residential
Year Built: 1977
Year Renovated: 1977
County: Los Angeles County
APN: 8714002005

Home facts updated by county records on Oct 7, 2026

Other

Listing Information
Days Active in MLS: 35
Continuous Days Active in MLS: 93

Listing Agent Information
List Agent First Name: Veronica
List Agent Last Name: Ryu
Co-List Agent First Name: Wayne
Co-List Agent Last Name: Adams

Listing Office Information
List Office Name: Coldwell Banker Tri-Counties R
Co-List Office Name: Coldwell Banker Tri-Counties R

Selling Agent Information
Buyer Agent First Name: Mauricio
Buyer Agent Last Name: Rodriguez

Selling Office Information
Buyer Office Name: Keller Williams Realty

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 • 1.0mi

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

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

$1.32M – $1.60M

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Home values near 21498 Cold Spring Ln

Data from public records.

Address	Redfin Estimate
21504 Cold Spring Lane, Diamond Bar, CA 4 Beds \| 3 Baths \| 2712 Sq. Ft.	$1,458,332
21494 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 2 Baths \| 2037 Sq. Ft.	$1,194,419

Address	Redfin Estimate
21502 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 3 Baths \| 2321 Sq. Ft.	$1,281,300
21492 Cold Spring Lane, Diamond Bar, CA 4 Beds \| 3 Baths \| 2378 Sq. Ft.	$1,391,875

Address	Redfin Estimate
21496 Cold Spring Lane, Diamond Bar, CA 4 Beds \| 3 Baths \| 2712 Sq. Ft.	$1,618,348
21490 Cold Spring Lane, Diamond Bar, CA 4 Beds \| - Baths \| 2712 Sq. Ft.	$1,437,168

Property information provided by CRMLS when last listed in 2026. 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 21498 Cold Spring Ln

Tax history for 21498 Cold Spring Ln

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 21498 Cold Spring Ln

More real estate resources