Google street view image for 21225 Cold Spring Ln, Diamond Bar, CA 91765

Off Market Aug 2016 for $546K

$881,052

Est. refi paymentEst. refi $357/mo

•

1,415

sq ft

21225 Cold Spring Ln, Diamond Bar, CA 91765

About this home

Great Diamond Bar neighborhood with close proximities to shopping and dining! Mid-Century, single story ranch style home that features a formal living room with rock fireplace, ceiling fan and large over sized window. The master suite has a with a huge add-on walk in closet and a master bath with a walk-in shower. The kitchen is bright and open with a cooktop, built-in dishwasher and oven and stainless steel sink. The kitchen in the open concept and opens up to the adjacent family room/eat-in kitchen. There are two additional bedrooms and one bedroom is extra large which had been the fourth bedroom (per the accessors data) and could easily be converted back. The second bathroom is a full bath with built-in oak cabinetry. The backyard has a beautiful brick covered patio with an amazing work shed with plumbing and electricity. There is a large covered patio is just off the open concept kitchen/family room. Along the east side of the home, there is a potters bench for those individuals with a green thumb. There is a large two car garage and a soft water system for the home.

Single-familyProperty Type

1962Year Built

7,579 sq ftLot Size

$623Est. Price/Sq.Ft.

2 car garageParking

Listed by Lynne Garretson •DRE #01825176 • CENTURY 21 EXPERIENCE

Bought with Gary Lee •DRE #01182914 • Coldwell Banker George Realty

Redfin checked: a few seconds ago

•Source:CRMLS #CV16167420

Redfin Estimate

$881,052

$334K since sold in August 2016$32K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 5.4% lower than the average sale price ($931K) of 6 comparable homes.

SOLD JUL 31, 2026
$875,000
A
3 beds2 baths1,300 sq ft
21245 Cold Spg, Diamond Bar, CA 91765
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 FEB 26, 2026
$880,000
C
3 beds2 baths1,280 sq ft
2632 Castle Rock, Diamond Bar, CA 91765
SOLD JUL 16, 2026
$958,600
D
3 beds2 baths1,372 sq ft
2127 Evergreen Springs Dr, Diamond Bar, CA 91765
Keller Williams Premier Prop
SOLD NOV 6, 2025
$900,000
E
3 beds2 baths1,300 sq ft
21223 Fountain Spgs, Diamond Bar, CA 91765
SOLD DEC 5, 2025
$999,999
F
3 beds2 baths1,300 sq ft
2968 Crooked Creek Dr, Diamond Bar, CA 91765

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Earn from this home

Sell

$489,232

Est. take-home

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Refinance

Est. cash available

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Rent

$3,281/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

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OPEN TODAY, 1PM TO 5PM
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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
$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 21225 Cold Spring Ln

Year

Property tax

Land + Additions

Assessment*

2025

$8,221 (+4.8%)

$508,798 + $127,197

$635,995

2024

$7,846 (+2.4%)

$508,798 + $127,197

$635,995

2023

$7,660 (+2.1%)

$498,822 + $124,703

$623,525

2022

$7,501 (+1.9%)

$489,042 + $122,258

$611,300

2021

$7,364 (+1.3%)

$479,453 + $119,861

$599,314

2020

$7,271 (+1.9%)

$470,052 + $117,511

$587,563

2019

$7,133 (+4.4%)

$465,233 + $116,307

$581,540

2018

$6,834 (+4.8%)

$456,111 + $114,027

$570,138

2017

$6,522 (+372.3%)

$438,400 + $109,600

$548,000

2016

$1,381 (−0.1%)

$438,400 + $109,600

$548,000

2015

$1,383 (−0.5%)

$23,579 + $67,467

$91,046

2014

$1,390 (+2.1%)

$22,771 + $65,153

$87,924

2012

$1,362 (+3.0%)

$22,669 + $64,859

$87,528

2011

$1,322 (+1.2%)

$22,225 + $63,588

$85,813

2010

$1,307 (+1.5%)

$21,790 + $62,342

$84,132

2009

$1,287 (+3.6%)

$21,628 + $61,877

$83,505

2008

$1,242

$21,680 + $62,024

$83,704

Tax history for 21225 Cold Spring Ln

Year

Property tax

Land + Additions

Assessment*

2025

$8,221 (+4.8%)

$508,798 + $127,197

$635,995

2024

$7,846 (+2.4%)

$508,798 + $127,197

$635,995

2023

$7,660 (+2.1%)

$498,822 + $124,703

$623,525

2022

$7,501 (+1.9%)

$489,042 + $122,258

$611,300

2021

$7,364 (+1.3%)

$479,453 + $119,861

$599,314

2020

$7,271 (+1.9%)

$470,052 + $117,511

$587,563

2019

$7,133 (+4.4%)

$465,233 + $116,307

$581,540

2018

$6,834 (+4.8%)

$456,111 + $114,027

$570,138

2017

$6,522 (+372.3%)

$438,400 + $109,600

$548,000

2016

$1,381 (−0.1%)

$438,400 + $109,600

$548,000

2015

$1,383 (−0.5%)

$23,579 + $67,467

$91,046

2014

$1,390 (+2.1%)

$22,771 + $65,153

$87,924

2012

$1,362 (+3.0%)

$22,669 + $64,859

$87,528

2011

$1,322 (+1.2%)

$22,225 + $63,588

$85,813

2010

$1,307 (+1.5%)

$21,790 + $62,342

$84,132

2009

$1,287 (+3.6%)

$21,628 + $61,877

$83,505

2008

$1,242

$21,680 + $62,024

$83,704

*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

7,581 Sq. Ft.

Year renovated

1962

Sq. Ft.

1,415

Year built

1962

Style

Single Family Residential

County

Los Angeles County

APN

8285018021

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

Parking / Garage Information
# of Garage Spaces: 2
# of Parking Spaces: 2

Interior

Bathroom Information
# of Baths (Full): 1
# of Baths (3/4): 1

Room Information
All Bedrooms Down, Foyer, Living Room, Primary Suite, Walk-In Closet

Fireplace Information
Living Room
Has Fireplace

Flooring Information
Laminated, Carpet

Interior Features
Ceiling Fan, Laminate Counters
Levels: One

Exterior

Exterior Features
Pool Features: None

Lot Information
Lot Size Source: Assessor's Data
Lot Features: Back Yard, Front Yard

Property Information
Total # of Units: 1
Common Walls: No Common Walls
Living Area Source: Assessor's Data
Parcel Number: 8285018021
Total # of Stories: 1
Has View
Year Built Source: Seller

Financial

Assesments Information
Assessments: Unknown

Utilities

Utilities Information
Sewer Connected
Water Source: District/Public

Location

Multi-Unit Information
# of Units In Community: 1

Neighborhood Information
Community Features: Sidewalks, Street Lighting

School Information
High School District: Walnut Valley Unified

Location Information
Latitude: 33.97493300
Longitude: -117.84194100
Road Frontage Type: Access via City Streets

Public facts

Beds: 4
Baths: 2.0
Sq. Ft.: 1,415
Stories: —
Lot Size: 7,581 square feet
Style: Single Family Residential
Year Built: 1962
Year Renovated: 1962
County: Los Angeles County
APN: 8285018021

Home facts updated by county records on Aug 31, 2026

Other

Miscellaneous Information
Exclusions: Microwave, personal belongings

Listing Information
Days Active in MLS: 5
Continuous Days Active in MLS: 5

Listing Agent Information
List Agent First Name: LYNNE
List Agent Last Name: GARRETSON

Listing Office Information
List Office Name: CENTURY 21 EXPERIENCE

Selling Agent Information
Buyer Agent First Name: Gary
Buyer Agent Last Name: Lee

Selling Office Information
Buyer Office Name: Coldwell Banker George

Around this home

Schools

Castle Rock Elementary School

Public K-5 • Assigned • 0.2mi

10/10

South Pointe Middle School

Public 6-8 • Assigned • 1.2mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 0.5mi

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

4% 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 9.5 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

$837,000 – $1.01M

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Home values near 21225 Cold Spring Ln

Data from public records.

Address	Redfin Estimate
21253 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 2 Baths \| 1252 Sq. Ft.	$916,992
21231 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 2 Baths \| 1280 Sq. Ft.	$887,791

Address	Redfin Estimate
21245 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 2 Baths \| 1300 Sq. Ft.	$899,708
21217 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 2 Baths \| 1798 Sq. Ft.	$928,562

Address	Redfin Estimate
21239 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 2 Baths \| 1280 Sq. Ft.	$887,621
21211 Cold Spring Lane, Diamond Bar, CA 4 Beds \| 2 Baths \| 1288 Sq. Ft.	$1,033,951

Property information provided by CRMLS when last listed in 2016. 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 21225 Cold Spring Ln

Tax history for 21225 Cold Spring Ln

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 21225 Cold Spring Ln

More real estate resources