21502 Cold Spring Ln, Diamond Bar, CA 91765

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Off Market Nov 2017 for $760K

$1,281,853

Est. refi paymentEst. refi $3,309/mo

•

2,321

sq ft

21502 Cold Spring Ln, Diamond Bar, CA 91765

About this home

Welcome to your new home located in beautiful and prestigious Diamond Bar this one of a kind home has everything that you're looking for! This fantastic home features 3 bedrooms, 3 bathrooms, and a bonus room which is perfect for entertaining or it could be converted into a 4th bedroom. With a sweeping view of the valley below this breath-taking house is perfectly situated in Diamond Bar! The care and love for this home that the owners have is apparent as you walk in and see all the improvements that have been made. The improvements that the owners have put in are almost too many to list! They have put in laminated wood floors, tank-less water-heater, the plumping was re-piped, kitchen recently remodeled and includes top of the line appliances, and a restroom that was just remodeled! Don't miss this once in lifetime property! You're going to love your new home with a view of the gorgeous valley below. This home also boasts a convenient location near the 57 and 60 freeway, and is also located in the amazing Walnut Valley Unified School District!

Single-familyProperty Type

1977Year Built

0.4 acresLot Size

$552Est. Price/Sq.Ft.

2 garage spacesParking

Listed by Michael Hasegawa •DRE #01997953 • Realty One Group West

Bought with LAURA RAMIREZ •DRE #01743765 • COLDWELL BANKER ENVISION

Redfin checked: 2 minutes ago

•Source:CRMLS #OC17176264

Redfin Estimate

$1,281,853

$522K since sold in November 2017$5,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 5% lower than the average sale price ($1.35M) 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 JUN 29, 2026
$1,350,000
B
4 beds3 baths2,334 sq ft
1715 Oxbow Ct, Diamond Bar, CA 91765
SOLD MAY 14, 2026
$1,330,000
C
4 beds3 baths2,037 sq ft
3357 Bent Twig, Diamond Bar, CA 91765
SOLD JUL 10, 2026
$1,350,000
D
4 beds3 baths2,268 sq ft
1754 Leaning Pne, Diamond Bar, CA 91765
SOLD MAR 25, 2026
$1,250,000
E
4 beds3 baths2,380 sq ft
3396 Hawkwood, Diamond Bar, CA 91765
SOLD JUL 27, 2026
$1,315,000
F
4 beds3 baths2,336 sq ft
3595 Hawkwood, Diamond Bar, CA 91765

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Earn from this home

Sell

$715,329

Est. take-home

List your home with Redfin and save $6,409

Refinance

Est. cash available

Get cash now or lower your monthly rate

Rent

$3,684/mo

Redfin rental estimate

List your home for rent

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, 12PM TO 4PM
$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, 1PM TO 3PM
$1,690,000
4 beds3 baths2,587 sq ft
1515 Sunbluff Dr, Diamond Bar, CA 91765
OPEN TODAY, 2PM TO 5PM
$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, 11AM TO 2PM
$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 21502 Cold Spring Ln

Date

Event

Price

SHOWMOJO #1

Jun 30, 2025

Rental Removed

$2,700

$1/sq ft

Jun 30, 2025

Listed for Rent

$2,700

$1/sq ft

Greater Lansing AoR #OC17176264

Nov 20, 2017

Sold

$760,000

$327/sq ft

Nov 20, 2017

Sold

$760,000

$327/sq ft

Oct 10, 2017

Pending

—

Sep 6, 2017

Contingent

—

Aug 1, 2017

Listed

$799,999

$345/sq ft

Aug 1, 2017

Listed

$799,999

$345/sq ft

Welcome to your new home located in beautiful and prestigious Diamond Bar this one of a kind home has everything that you're looking for! This fantastic home features 3 bedrooms, 3 bathrooms, and a bonus room which is perfect for entertaining or it could be converted into a 4th bedroom.With a sweeping view of the valley below this breath-taking house is perfectly situated in Diamond Bar! The care and love for this home that the owners have is apparent as you walk in and see all the improvements that have been made. The improvements that the owners have put in are almost too many to list! They have put in laminated wood floors, tank-less water-heater, the plumping was re-piped, kitchen recently remodeled and includes top of the line appliances, and a restroom that was just remodeled! Don't miss this once in lifetime property! You're going to love your new home with a view of the gorgeous valley below. This home also boasts a convenient location near the 57 and 60 freeway, and is also located in the amazing Walnut Valley Unified School District!

CRMLS #OC17041156

Jul 31, 2017

Listing Removed

—

Jun 23, 2017

Price Changed

$799,999

$345/sq ft

Jun 10, 2017

Price Changed

$804,999

$347/sq ft

Mar 1, 2017

Listed

$805,000

$347/sq ft

CRMLS #OC16722403

Jan 31, 2017

Listing Removed

—

Dec 26, 2016

Price Changed

$808,888

$349/sq ft

Oct 10, 2016

Listed

$810,000

$349/sq ft

CRMLS #OC16125221

Oct 10, 2016

Listing Removed

—

Sep 26, 2016

Price Changed

$815,000

$351/sq ft

Aug 24, 2016

Price Changed

$820,000

$353/sq ft

Jul 12, 2016

Price Changed

$825,000

$355/sq ft

Jun 10, 2016

Listed

$835,000

$360/sq ft

Public Records

Dec 30, 2004

Sold

$660,000

$284/sq ft

Public Records

Dec 30, 2004

Sold

$618,818

$267/sq ft

CRMLS #H414994

Dec 29, 2004

Sold

$619,000

$267/sq ft

Nov 7, 2004

Listed

$650,000

$280/sq ft

CRMLS #C412978

Nov 1, 2004

Listing Removed

—

Jul 26, 2004

Listed

$639,000

$275/sq ft

Public Records

Nov 6, 1998

Sold

$299,000

$129/sq ft

Public Records

Apr 7, 1978

Sold

$106,000

$46/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$11,247 (+5.5%)

$630,582 + $234,163

$864,745

2024

$10,662 (+2.9%)

$630,582 + $234,163

$864,745

2023

$10,361 (+2.6%)

$618,218 + $229,572

$847,790

2022

$10,099 (+1.9%)

$606,097 + $225,071

$831,168

2021

$9,913 (+0.8%)

$594,213 + $220,658

$814,871

2020

$9,838 (+2.5%)

$582,562 + $216,332

$798,894

2019

$9,602 (+4.3%)

$576,589 + $214,114

$790,703

2018

$9,208 (+5.9%)

$565,284 + $209,916

$775,200

2017

$8,691 (+3.0%)

$480,413 + $263,024

$743,437

2016

$8,436 (−0.6%)

$480,413 + $263,024

$743,437

2015

$8,488 (+11.4%)

$470,994 + $257,867

$728,861

2014

$7,622 (+13.0%)

$405,000 + $222,000

$627,000

2012

$6,745 (+1.1%)

$372,000 + $204,000

$576,000

2011

$6,675

$351,000 + $192,200

$543,200

2010

$6,671 (+0.5%)

$351,000 + $192,200

$543,200

2009

$6,638 (−15.8%)

$351,000 + $192,200

$543,200

2008

$7,881

$351,000 + $192,200

$543,200

Tax history for 21502 Cold Spring Ln

Year

Property tax

Land + Additions

Assessment*

2025

$11,247 (+5.5%)

$630,582 + $234,163

$864,745

2024

$10,662 (+2.9%)

$630,582 + $234,163

$864,745

2023

$10,361 (+2.6%)

$618,218 + $229,572

$847,790

2022

$10,099 (+1.9%)

$606,097 + $225,071

$831,168

2021

$9,913 (+0.8%)

$594,213 + $220,658

$814,871

2020

$9,838 (+2.5%)

$582,562 + $216,332

$798,894

2019

$9,602 (+4.3%)

$576,589 + $214,114

$790,703

2018

$9,208 (+5.9%)

$565,284 + $209,916

$775,200

2017

$8,691 (+3.0%)

$480,413 + $263,024

$743,437

2016

$8,436 (−0.6%)

$480,413 + $263,024

$743,437

2015

$8,488 (+11.4%)

$470,994 + $257,867

$728,861

2014

$7,622 (+13.0%)

$405,000 + $222,000

$627,000

2012

$6,745 (+1.1%)

$372,000 + $204,000

$576,000

2011

$6,675

$351,000 + $192,200

$543,200

2010

$6,671 (+0.5%)

$351,000 + $192,200

$543,200

2009

$6,638 (−15.8%)

$351,000 + $192,200

$543,200

2008

$7,881

$351,000 + $192,200

$543,200

*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

0.4 Acres

Year renovated

1980

Sq. Ft.

2,321

Year built

1977

Style

Single Family Residential

County

Los Angeles County

APN

8714002004

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
Uncovered Spaces: 3
Attached Garage
# of Garage Spaces: 2
Assigned, Unassigned, Uncovered, Driveway, Garage
Has Parking
# of Parking Spaces: 5

Interior

Laundry Information
Has Laundry
Electric Dryer Hookup, In Garage, Washer Hookup

Kitchen Information
Appliances: 6 Burner Stove, Built In Range, Dishwasher, Electric Water Heater, Energy Star Appliances, Garbage Disposal, Gas Oven, Gas Range, Gas Cooktop, Microwave
Has Appliances
Formal Dining Room, In Kitchen
Kitchen Island

Bathroom Information
# of Baths (Full): 2
# of Baths (3/4): 1
Bathtub, Shower, Shower in Tub, Double sinks in bath(s), Double Sinks In Master Bath, Dual shower heads (or Multiple), Exhaust fan(s)

Cooling Information
Central, Energy Star
Has Cooling

Room Information
All Bedrooms Down, Bonus Room, Den

Fireplace Information
Living Room
Has Fireplace

Flooring Information
Laminated

Heating Information
Central Furnace
Has Heating

Interior Features
Double Door Entry, Sliding Glass Door(s)
Bar, Beamed Ceilings, Built-Ins, Cathedral-Vaulted Ceilings, Ceiling Fan, Copper Plumbing Full, High Ceilings (9 Feet+), Open Floor Plan
Levels: One
Main Level Bathrooms: 3
Main Level Bedrooms: 3
Security Features: Carbon Monoxide Detector(s), Security Lights, Smoke Detector
Window Features: Blinds

Exterior

Exterior Information
Roof: Spanish Tile
Fencing: Wood
Has Fence

Exterior Features
Patio And Porch Features: Patio, Patio Open
Has Patio
Pool Features: None

Lot Information
Elevation Units: Feet
Lot Size Source: Assessor's Data
Lot Features: Back Yard, Garden, Lawn, Park Nearby, Steep Slope, Treed Lot, Yard

Property Information
Total # of Units: 1
Common Walls: No Common Walls
Direction Faces: East
Parcel Number: 8714002004
Property Condition: Turnkey, Updated/Remodeled
Total # of Stories: 1
Has View
Year Built Source: Assessor

Utilities

Utilities Information
Electric: 220V In Kitchen
Sewer: Public Sewer
Cable Available, Electricity Available, Electricity Connected, Natural Gas Connected, Telephone - In Street, Sewer Connected, Water Connected
Water Source: District/Public

Location

Multi-Unit Information
# of Units In Community: 1

Neighborhood Information
Community Features: Foothills, Gutters, Storm Drains, Street Lighting, Suburban, Valley

School Information
Elementary School: Castle Rock
Middle Or Junior School: South Pointe
High School: Diamond Bar
High School District: Walnut Valley Unified
Elementary School 2: CASROC
Middle Or Junior School 2: SOUPOI
High School 2: DIABAR

Location Information
Latitude: 33.96699700
Longitude: -117.84128100
Directions: Exit the 57 Diamond Bar Blvd exit. Head East on Diamond Bar Blvd to Cold Spring Lane, turn right.
Zoning: LCR19000*

Public facts

Beds: 3
Baths: 3.0
Sq. Ft.: 2,321
Stories: —
Lot Size: 0.4 acres
Style: Single Family Residential
Year Built: 1977
Year Renovated: 1980
County: Los Angeles County
APN: 8714002004

Home facts updated by county records on Aug 30, 2026

Other

Miscellaneous Information
Exclusions: All personal property.

Listing Information
Days Active in MLS: 36
Continuous Days Active in MLS: 36

Listing Agent Information
List Agent First Name: Michael
List Agent Last Name: Hasegawa

Listing Office Information
List Office Name: Realty One Group Inc

Selling Agent Information
Buyer Agent First Name: LAURA
Buyer Agent Last Name: RAMIREZ

Selling Office Information
Buyer Office Name: BERKSHIRE HATHAWAY HOMESERV.

Around this home

Schools

Castle Rock Elementary School

Public K-5 • Assigned • 0.4mi

10/10

South Pointe Middle School

Public 6-8 • Assigned • 1.8mi

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

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

$1.22M – $1.48M

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Home values near 21502 Cold Spring Ln

Data from public records.

Address	Redfin Estimate
21504 Cold Spring Ln, Diamond Bar, CA 4 Beds \| 3 Baths \| 2712 Sq. Ft.	$1,429,965
21494 Cold Spring Ln, Diamond Bar, CA 3 Beds \| 2 Baths \| 2037 Sq. Ft.	$1,198,405

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

Address	Redfin Estimate
21496 Cold Spring Ln, Diamond Bar, CA 4 Beds \| 3 Baths \| 2712 Sq. Ft.	$1,647,056
21490 Cold Spring Ln, Diamond Bar, CA 4 Beds \| - Baths \| 2712 Sq. Ft.	$1,480,623

Property information provided by CRMLS when last listed in 2023. This data may not match . Learn more.

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