21471 Cold Spring Ln, Diamond Bar, CA 91765

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Off Market Aug 2017 for $746K

$1,276,163

Est. refi paymentEst. refi $4,847/mo

•

2,037

sq ft

21471 Cold Spring Ln, Diamond Bar, CA 91765

About this home

Beautiful home with 4 bedroom, (4th bedroom converted to bonus room with built-in wet bar and cabinets), 2 bath plus family room, located in prestigious Diamond Ridge community of Diamond Bar and within the highly acclaimed Walnut Valley Unified School District. Open and spacious floor plan with formal living room and formal dining area. Wooden French doors leads into the separate step down family room. Kitchen includes built-ins and breakfast style eating area with plenty of cabinet and counter space. Large Brick Fireplace in formal living room. Cathedral ceilings, ceiling fans. Master bedroom suite with dual sink, ample closet space with mirrored closet doors and extra storage space. Glass Sliding doors lead one to backyard, featuring an in-ground pool and spa, and a covered patio providing for outdoor enjoyment. New Roof installed approximately 12 years ago, composition shingle-cedar blend. Neatly landscaped front and back yards. Extra large yard with trees and plants along the up sloping area beyond pool. Centrally located, nearby Country Hills Town Shopping center, Heritage Park nearby. Close to transportation and easy access to local 57/10/60 freeways.

Single-familyProperty Type

1977Year Built

0.42 acresLot Size

$626Est. Price/Sq.Ft.

2 garage spacesParking

Listed by Neftali Cortez •DRE #00560181 • RE/MAX Galaxy

Bought with Su Ching Chiang •DRE #01908446 • IRN Realty

Redfin checked: 2 minutes ago

•Source:CRMLS #TR17154595

Redfin Estimate

$1,276,163

$530K since sold in August 2017$2,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 2.8% lower than the average sale price ($1.31M) 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 JUN 29, 2026
$1,350,000
F
4 beds3 baths2,334 sq ft
1715 Oxbow Ct, Diamond Bar, CA 91765

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Sell

$722,947

Est. take-home

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Refinance

Est. cash available

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Rent

$3,401/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

OPEN SAT, 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 SAT, 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 SAT, 1PM TO 3PM
$1,690,000
4 beds3 baths2,587 sq ft
1515 Sunbluff Dr, Diamond Bar, CA 91765
OPEN SAT, 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 SAT, 11AM TO 2PM
$1,150,000
4 beds3 baths1,747 sq ft
1036 Cogburn Ln, Diamond Bar, CA 91765
OPEN SAT, 12PM TO 3PM
$1,499,900
4 beds2.5 baths2,344 sq ft
23450 Amberwick Pl, Diamond Bar, CA 91765
RE/MAX 2000 REALTY
OPEN TODAY, 12PM TO 2PM
$1,424,998
5 beds3 baths3,203 sq ft
24222 Brookwood Dr, Diamond Bar, CA 91765
Rubio Real Estate
See all

Provided by Redfin

Sale history for 21471 Cold Spring Ln

Date

Event

Price

Greater Lansing AoR #TR17154595

Aug 22, 2017

Sold

$746,000

$366/sq ft

Aug 22, 2017

Sold

$746,000

$366/sq ft

Aug 10, 2017

Contingent

—

Jul 25, 2017

Price Changed

$758,000

$372/sq ft

Jul 22, 2017

Price Changed

$767,888

$377/sq ft

Jul 7, 2017

Listed

$768,888

$377/sq ft

Jun 1, 2017

Listed

$758,000

$372/sq ft

CRMLS #TR17123398

Jul 7, 2017

Listing Removed

—

Jun 30, 2017

Price Changed

$768,888

$377/sq ft

Jun 3, 2017

Listed

$798,888

$392/sq ft

Public Records

Aug 26, 1985

Sold

$172,000

$84/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$10,846 (+4.9%)

$544,107 + $304,708

$848,815

2024

$10,340 (+2.4%)

$544,107 + $304,708

$848,815

2023

$10,093 (+2.1%)

$533,439 + $298,734

$832,173

2022

$9,885 (+1.9%)

$522,980 + $292,877

$815,857

2021

$9,704 (+1.3%)

$512,726 + $287,135

$799,861

2020

$9,581 (+1.9%)

$502,673 + $281,505

$784,178

2019

$9,398 (+4.1%)

$497,519 + $278,619

$776,138

2018

$9,031 (+141.7%)

$487,764 + $273,156

$760,920

2017

$3,736 (+3.3%)

$118,040 + $177,066

$295,106

2016

$3,616 (−0.5%)

$118,040 + $177,066

$295,106

2015

$3,634 (−0.3%)

$115,726 + $173,595

$289,321

2014

$3,645 (+1.3%)

$111,756 + $167,639

$279,395

2012

$3,598 (+2.9%)

$111,251 + $166,882

$278,133

2011

$3,495 (+0.8%)

$109,070 + $163,610

$272,680

2010

$3,466 (+0.6%)

$106,932 + $160,402

$267,334

2009

$3,446 (+2.9%)

$106,133 + $159,204

$265,337

2008

$3,349

$106,386 + $159,583

$265,969

Tax history for 21471 Cold Spring Ln

Year

Property tax

Land + Additions

Assessment*

2025

$10,846 (+4.9%)

$544,107 + $304,708

$848,815

2024

$10,340 (+2.4%)

$544,107 + $304,708

$848,815

2023

$10,093 (+2.1%)

$533,439 + $298,734

$832,173

2022

$9,885 (+1.9%)

$522,980 + $292,877

$815,857

2021

$9,704 (+1.3%)

$512,726 + $287,135

$799,861

2020

$9,581 (+1.9%)

$502,673 + $281,505

$784,178

2019

$9,398 (+4.1%)

$497,519 + $278,619

$776,138

2018

$9,031 (+141.7%)

$487,764 + $273,156

$760,920

2017

$3,736 (+3.3%)

$118,040 + $177,066

$295,106

2016

$3,616 (−0.5%)

$118,040 + $177,066

$295,106

2015

$3,634 (−0.3%)

$115,726 + $173,595

$289,321

2014

$3,645 (+1.3%)

$111,756 + $167,639

$279,395

2012

$3,598 (+2.9%)

$111,251 + $166,882

$278,133

2011

$3,495 (+0.8%)

$109,070 + $163,610

$272,680

2010

$3,466 (+0.6%)

$106,932 + $160,402

$267,334

2009

$3,446 (+2.9%)

$106,133 + $159,204

$265,337

2008

$3,349

$106,386 + $159,583

$265,969

*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

0.42 Acres

Year renovated

1977

Sq. Ft.

2,037

Year built

1977

Style

Single Family Residential

County

Los Angeles County

APN

8714004004

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: 2
Attached Garage
# of Garage Spaces: 2
Covered Parking, Uncovered, Driveway, Garage, Direct Garage Access
Has Parking
# of Parking Spaces: 4

Interior

Laundry Information
Has Laundry
In Garage

Kitchen Information
Appliances: Double Oven, Garbage Disposal
Has Appliances
Formal Dining Room, In Kitchen

Bathroom Information
# of Baths (Full): 2
Bathtub, Shower, Double Sinks In Master Bath

Cooling Information
Central
Has Cooling

Room Information
All Bedrooms Down, Bonus Room, Family Room, Kitchen, Living Room, Main Floor Bedroom, Main Floor Primary Bedroom, Primary Bathroom, Primary Bedroom, Primary Suite

Fireplace Information
Living Room
Has Fireplace

Flooring Information
Carpet, Tile

Heating Information
Central Furnace, Forced Air
Has Heating

Interior Features
Double Door Entry, French Doors, Mirrored Closet Doors, Sliding Glass Door(s)
Block Walls, Built-Ins, Cathedral-Vaulted Ceilings, Ceiling Fan, Open Floor Plan, Wet Bar
Levels: One
Main Level Bathrooms: 2
Main Level Bedrooms: 4
Spa Features: Gunite, In Ground
Has Spa

Exterior

Exterior Information
Roof: Composition, Shingle
Fencing: Blockwall, Chain Link, Wrought Iron
Has Fence

Foundation Information
Foundation Details: Concrete Slab

Exterior Features
Patio And Porch Features: Covered, Slab
Has Patio
Pool Features: Private, In Ground, Filtered, Heated, Heated with Gas, Gunite
Has Pool

Lot Information
Elevation Units: Feet
Lot Size Source: Assessor's Data
Lot Features: 0-1 Unit/Acre, Back Yard, Front Yard, Landscaped, Lawn, Near Public Transit, Yard

Property Information
Total # of Units: 1
Common Walls: No Common Walls
Parcel Number: 8714004004
Property Condition: Termite Clearance
Total # of Stories: 1
Year Built Source: Assessor

Financial

Assesments Information
Assessments: Unknown

Utilities

Utilities Information
Electric: 220V In Garage
Sewer: Public Sewer
Water Source: District/Public

Location

Multi-Unit Information
# of Units In Community: 1

Neighborhood Information
Community Features: Curbs, Sidewalks, Storm Drains, Street Lighting

School Information
High School District: Walnut Valley Unified

Location Information
Latitude: 33.96894600
Longitude: -117.83956400
Directions: Major Cross Streets: Diamond Bar Boulevard and Cold Spring Lane
Road Frontage Type: Access via City Streets
Road Surface Type: Paved
Zoning: LCR19000*

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 2,037
Stories: —
Lot Size: 0.42 acres
Style: Single Family Residential
Year Built: 1977
Year Renovated: 1977
County: Los Angeles County
APN: 8714004004

Home facts updated by county records on Aug 30, 2026

Other

Listing Information
Days Active in MLS: 64
Continuous Days Active in MLS: 64

Listing Agent Information
List Agent First Name: Neftali
List Agent Last Name: Cortez

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

Selling Agent Information
Buyer Agent First Name: Su Ching
Buyer Agent Last Name: Chiang

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 • 1.6mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 0.8mi

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, 18 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

$1.21M – $1.47M

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RE/MAX 2000 REALTY

Home values near 21471 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
21472 Cold Spring Lane, Diamond Bar, CA 4 Beds \| - Baths \| 2712 Sq. Ft.	$1,478,600

Address	Redfin Estimate
21476 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 3 Baths \| 2796 Sq. Ft.	$1,460,093
21470 Cold Spring Lane, Diamond Bar, CA 3 Beds \| 3 Baths \| 2378 Sq. Ft.	$1,304,547

Address	Redfin Estimate
21474 Cold Spring Lane, Diamond Bar, CA 4 Beds \| 2 Baths \| 2037 Sq. Ft.	$1,378,239
21462 Cold Spring Lane, Diamond Bar, CA 3 Beds \| - Baths \| 2037 Sq. Ft.	$1,009,783

Property information provided by CRMLS when last listed in 2017. This data may not match . Learn more.

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