21438 Cold Spring Ln, Diamond Bar, CA 91765

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Off Market Oct 2012 for $575K

$1,252,204

Est. refi paymentEst. refi $3,813/mo

•

2,037

sq ft

21438 Cold Spring Ln, Diamond Bar, CA 91765

About this home

Prestigious Diamond Ridge home, with excellent curb appeal. Double door entry leads you to a step down living room with beautiful ledge stone fireplace & a formal dining. 4 bedrooms one is used as a den with upscale wet bar, offers corian counter tops, refrigerator and wine cooler. Also both bathrooms are totally upgraded. Large remodeled kitchen offers corian counter tops newer sink, & faucets, lots of upgraded cabinets, raised ceiling and recess lighting. Cozy family room opens out to large covered patio and professional landscaped. Excellent curb appeal! Newer double pane windows & upgrade flooring thru-out. Up-scale neighborhood and close to award wining Walnut schools, close to shopping & transportation. Many upgrade must see!

Single-familyProperty Type

1977Year Built

0.51 acresLot Size

$615Est. Price/Sq.Ft.

2 car garageParking

Listed by Lilia Loo Fong •DRE #00880601 • RE/MAX Galaxy

Listed by Grace Kramer •DRE #00639657 • RE/MAX Galaxy

Bought with ZU-CHEN TSI •DRE #01841363 • IRN REALTY

Redfin checked: a minute ago

•Source:CRMLS #H12075682

Redfin Estimate

$1,252,204

$677K since sold in October 2012$5,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 7.4% lower than the average sale price ($1.35M) of 6 comparable homes.

SOLD MAY 14, 2026
$1,330,000
A
4 beds3 baths2,037 sq ft
3357 Bent Twig, Diamond Bar, CA 91765
SOLD FEB 26, 2026
$1,180,000
B
3 beds2 baths1,752 sq ft
21465 Running Br, Diamond Bar, CA 91765
SOLD AUG 10, 2026
$1,163,000
C
4 beds2 baths1,780 sq ft
1934 Ano Nuevo, Diamond Bar, CA 91765
Pinnacle Real Estate Group
SOLD JUL 10, 2026
$1,350,000
D
4 beds3 baths2,268 sq ft
1754 Leaning Pne, Diamond Bar, CA 91765
SOLD MAY 28, 2026
$1,505,000
E
4 beds3 baths2,712 sq ft
3249 Hawkwood Rd, Diamond Bar, CA 91765
SOLD JUL 17, 2026
$1,589,000
F
4 beds2.5 baths2,805 sq ft
21040 Ambushers, Diamond Bar, CA 91765
New Star Realty & Inv.

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Earn from this home

Sell

$873,286

Est. take-home

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Refinance

Est. cash available

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Rent

$3,393/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

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

$1,198,000
4 beds3 baths1,829 sq ft
21116 Silver Cloud, Diamond Bar, CA 91765
NEW 7 HRS AGO
$470,000
2 beds2 baths912 sq ft
22719 Lakeway #402, Diamond Bar, CA 91765
KC Realty Group
OPEN TODAY, 1PM TO 3PM
$599,000
3 beds1 bath1,000 sq ft
1320 S Diamond Bar Blvd Unit D, Diamond Bar, CA 91765
3D WALKTHROUGH
$585,000
2 beds2.5 baths1,012 sq ft
1109 Golden Springs Dr Unit D, Diamond Bar, CA 91765
OPEN TODAY, 11AM TO 2PM
$1,299,000
4 beds3 baths3,019 sq ft
3581 Hawkwood, Diamond Bar, CA 91765
The Agency
OPEN SUN, 12PM TO 2PM
$515,000
2 beds1.5 baths1,071 sq ft
1060 Golden Spgs Unit E, Diamond Bar, CA 91765
OPEN TODAY, 11AM TO 2PM
$949,979
4 beds2 baths1,465 sq ft
227 N Pintado Dr, Diamond Bar, CA 91765
OPEN TODAY, 1PM TO 4PM
$1,380,000
4 beds3 baths2,074 sq ft
1553 High Bluff Dr, Diamond Bar, CA 91765
$1,699,000
4 beds3 baths3,802 sq ft
24030 Shotgun Ln, Diamond Bar, CA 91765
3D & VIDEO TOUR
$1,299,000
5 beds4 baths2,116 sq ft
1537 Meadow Gln, Diamond Bar, CA 91765
See all

Provided by Redfin

Sale history for 21438 Cold Spring Ln

Date

Event

Price

CRMLS #H12075682

Oct 5, 2012

Sold

$575,000

$282/sq ft

Sep 7, 2012

Pending

—

Aug 10, 2012

Price Changed

$589,998

$290/sq ft

Jun 30, 2012

Relisted

—

Jun 23, 2012

Pending

—

Jun 15, 2012

Listed

$599,888

$294/sq ft

CRMLS #P572151

Aug 18, 2007

Listing Removed

—

Apr 19, 2007

Listed

$729,000

$358/sq ft

CRMLS #H07055772

Aug 2, 2007

Listing Removed

—

Apr 18, 2007

Listed

$729,000

$358/sq ft

Public Records

May 6, 1997

Sold

$215,000

$106/sq ft

Public Records

Nov 10, 1980

Sold

$80,000

$39/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$9,144 (+3.3%)

$328,291 + $379,766

$708,057

2024

$8,852 (+3.0%)

$328,291 + $379,766

$708,057

2023

$8,596 (+2.7%)

$321,854 + $372,320

$694,174

2022

$8,370 (+1.9%)

$315,544 + $365,020

$680,564

2021

$8,215 (+1.3%)

$309,357 + $357,863

$667,220

2020

$8,112 (+1.9%)

$303,292 + $350,847

$654,139

2019

$7,958 (+5.3%)

$300,183 + $347,250

$647,433

2018

$7,557 (+4.8%)

$294,298 + $340,442

$634,740

2017

$7,213 (+3.0%)

$282,871 + $327,223

$610,094

2016

$7,000 (−0.6%)

$282,871 + $327,223

$610,094

2015

$7,042 (−0.2%)

$277,325 + $320,807

$598,132

2014

$7,055 (+91.8%)

$267,810 + $309,800

$577,610

2012

$3,679 (+2.9%)

$266,600 + $308,400

$575,000

2011

$3,574 (+0.8%)

$148,594 + $130,180

$278,774

2010

$3,544 (+0.6%)

$145,681 + $127,628

$273,309

2009

$3,524 (+2.9%)

$144,593 + $126,675

$271,268

2008

$3,426

$144,937 + $126,976

$271,913

Tax history for 21438 Cold Spring Ln

Year

Property tax

Land + Additions

Assessment*

2025

$9,144 (+3.3%)

$328,291 + $379,766

$708,057

2024

$8,852 (+3.0%)

$328,291 + $379,766

$708,057

2023

$8,596 (+2.7%)

$321,854 + $372,320

$694,174

2022

$8,370 (+1.9%)

$315,544 + $365,020

$680,564

2021

$8,215 (+1.3%)

$309,357 + $357,863

$667,220

2020

$8,112 (+1.9%)

$303,292 + $350,847

$654,139

2019

$7,958 (+5.3%)

$300,183 + $347,250

$647,433

2018

$7,557 (+4.8%)

$294,298 + $340,442

$634,740

2017

$7,213 (+3.0%)

$282,871 + $327,223

$610,094

2016

$7,000 (−0.6%)

$282,871 + $327,223

$610,094

2015

$7,042 (−0.2%)

$277,325 + $320,807

$598,132

2014

$7,055 (+91.8%)

$267,810 + $309,800

$577,610

2012

$3,679 (+2.9%)

$266,600 + $308,400

$575,000

2011

$3,574 (+0.8%)

$148,594 + $130,180

$278,774

2010

$3,544 (+0.6%)

$145,681 + $127,628

$273,309

2009

$3,524 (+2.9%)

$144,593 + $126,675

$271,268

2008

$3,426

$144,937 + $126,976

$271,913

*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

0.51 Acres

Year renovated

1977

Sq. Ft.

2,037

Year built

1977

Style

Single Family Residential

County

Los Angeles County

APN

8714001016

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: 2

Interior

Laundry Information
Has Laundry
In Garage, Washer Hookup

Kitchen Information
Appliances: Dishwasher, Garbage Disposal, Oven, Stove
Has Appliances
Breakfast Counter / Bar, Formal Dining Room

Bathroom Information
# of Baths (Full): 2

Cooling Information
Central
Has Cooling

Room Information
Primary Suite

Fireplace Information
Living Room
Has Fireplace

Flooring Information
Tile

Heating Information
Central Furnace
Has Heating

Interior Features
Levels: One

Exterior

Exterior Information
Fencing: Blockwall
Has Fence

Exterior Features
Patio And Porch Features: Covered, Deck
Has Patio
Pool Features: None
Has Sprinklers

Lot Information
Lot Size Source: Assessor's Data
Lot Features: Sprinklers In Front, Sprinklers In Rear

Property Information
Living Area Source: Assessor's Data
Parcel Number: 8714001016
Property Condition: Turnkey
Has View
Year Built Source: Assessor

Location

Neighborhood Information
Community Features: Curbs, Sidewalks, Street Lighting

School Information
High School District: Walnut Valley Unified

Location Information
Latitude: 33.97056200
Longitude: -117.83976000

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 2,037
Stories: —
Lot Size: 0.51 acres
Style: Single Family Residential
Year Built: 1977
Year Renovated: 1977
County: Los Angeles County
APN: 8714001016

Home facts updated by county records on Aug 30, 2026

Other

Listing Information
Days Active in MLS: 78
Continuous Days Active in MLS: 124

Listing Agent Information
List Agent First Name: Lilia Loo
List Agent Last Name: Fong
Co-List Agent First Name: Grace
Co-List Agent Last Name: Kramer

Listing Office Information
List Office Name: Re/Max Realty 100
Co-List Office Name: Re/Max Realty 100

Selling Agent Information
Buyer Agent First Name: ZU-CHEN
Buyer Agent Last Name: TSI

Selling Office Information
Buyer Office Name: IRN REALTY

Around this home

Schools

Castle Rock Elementary School

Public K-5 • Assigned • 0.3mi

10/10

South Pointe Middle School

Public 6-8 • Assigned • 1.5mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 0.7mi

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

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

$1.19M – $1.44M

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Home values near 21438 Cold Spring Ln

Data from public records.

Address	Redfin Estimate
21472 Cold Spring Ln, Diamond Bar, CA 4 Beds \| - Baths \| 2712 Sq. Ft.	$1,478,600
21458 Cold Spring Ln, Diamond Bar, CA 4 Beds \| 3 Baths \| 2294 Sq. Ft.	$1,249,396

Address	Redfin Estimate
21470 Cold Spring Ln, Diamond Bar, CA 3 Beds \| 3 Baths \| 2378 Sq. Ft.	$1,304,547
21454 Cold Spring Ln, Diamond Bar, CA 4 Beds \| 3 Baths \| 2712 Sq. Ft.	$1,545,106

Address	Redfin Estimate
21462 Cold Spring Ln, Diamond Bar, CA 3 Beds \| - Baths \| 2037 Sq. Ft.	$1,009,783
21450 Cold Spring Ln, Diamond Bar, CA 5 Beds \| 3 Baths \| 2796 Sq. Ft.	$1,231,210

Property information provided by CRMLS when last listed in 2012. 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 21438 Cold Spring Ln

Tax history for 21438 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 21438 Cold Spring Ln

More real estate resources