OFF MARKET
Google street view image for 21429 Cold Spring Ln, Diamond Bar, CA 91765
Off Market Nov 1978 for $121K
$1,330,750
Est. refi paymentEst. refi $808/mo
3
bd
•
3 ba
•
2,712
sq ft

21429 Cold Spring Ln, Diamond Bar, CA 91765

map-entry

About this home

21429 Cold Spring Ln is a 2,712 square foot house on a 0.61 acre lot with 3 bedrooms and 3 bathrooms. - it last sold on November 22, 1978 for $121,500. Based on Redfin's Diamond Bar data, we estimate the home's value is $1,330,750.
Single-familyProperty Type
1977Year Built
0.61 acresLot Size
$491Est. Price/Sq.Ft.
Source:Public Records

Redfin Estimate

$1,330,750
$1.2M since sold in November 1978$9,000 since August

This home's estimate is 12.6% lower than the average sale price ($1.52M) of 6 comparable homes.

Claim this home to receive a free report every month with insights on the changing estimate.

Earn from this home

Sell
$1,257,578
Est. take-home

List your home with Redfin and save $6,654

Refinance
$0
Est. cash available

Get cash now or lower your monthly rate

Rent
$3,889/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
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

Provided by Redfin

Sale history for 21429 Cold Spring Ln

Tax history for 21429 Cold Spring Ln

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Zoning

RL

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

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

5/10 Heat Factor

5 days above 98° expected this year, 15 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)
68
50
71
52
73
53
72
53
76
57
81
60
83
61
89
65
86
64
80
59
71
52
69
51
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
$1.26M – $1.53M

Reach more buyers when you sell with Redfin. Save up to $13,308 in fees. 3 minutes to get started.

Need the cash from your home fast? Sell to .

Nearby similar homes

$1,250,000
5 beds3 baths2,304 sq ft
1313 Fairlance, Diamond Bar, CA 91789
$1,249,999
4 beds3 baths2,218 sq ft
1752 Maple Hl, Diamond Bar, CA 91765
First Team Real Estate
$1,290,000
3 beds2.5 baths2,120 sq ft
20977 E Canyon Ridge Ln, Diamond Bar, CA 91789
$1,068,000
3 beds2 baths1,768 sq ft
2532 Crooked Crk, Diamond Bar, CA 91765
$1,150,000
4 beds3 baths2,144 sq ft
20211 Lake Cyn, Walnut, CA 91789
$1,560,000
4 beds2 baths2,230 sq ft
2000 Chestnut Crk, Diamond Bar, CA 91765

New listings for sale in 91765

COMING SOON
$6,500,000
8 beds11 baths14,119 sq ft
2955 Wagon Train, Diamond Bar, CA 91765
Alt Financial Network Inc
FOR SALE BY OWNER
$425,000
2 beds1 bath850 sq ft
22801 Hilton Head Dr Unit 17, Diamond Bar, CA 91765
$1,198,000
4 beds3 baths1,829 sq ft
21116 Silver Cloud, Diamond Bar, CA 91765
$470,000
2 beds2 baths912 sq ft
22719 Lakeway #402, Diamond Bar, CA 91765
KC Realty Group
$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
$1,299,000
4 beds3 baths3,019 sq ft
3581 Hawkwood, Diamond Bar, CA 91765
The Agency
$515,000
2 beds1.5 baths1,071 sq ft
1060 Golden Spgs Unit E, Diamond Bar, CA 91765
$949,979
4 beds2 baths1,465 sq ft
227 N Pintado Dr, Diamond Bar, CA 91765

Home values near 21429 Cold Spring Ln

Data from public records.

More real estate resources

Pathfinder homes for sale
Download the Redfin App on the Apple App Store
Download the Redfin App from the Google Play Store

Join us

Become an Agent
Get referrals
Careers

Find homes faster

Download the Redfin App on the Apple App Store
Download the Redfin App from the Google Play Store

About us

Why Redfin?
Community Impact
Inclusion
Culture
Press
Investors
Blog
Real Estate News

Find us

Contact Us
Help Center
Advertise

Subsidiaries

Rent.
ApartmentGuide

Affiliated Business

Rocket Close
Rocket Mortgage

Countries

US flagUnited States

Canadian flagCanada

Copyright: © 2026 Redfin. All rights reserved.

Updated September 2025: By searching, you agree to the Terms of Use, and Privacy Policy.

Do not sell or share my personal information.

REDFIN and all REDFIN variants, WALK SCORE, and the R logos, are trademarks of Redfin Corporation, registered or pending in the USPTO.

California DRE #01521930

Redfin is licensed to do business in New York as Redfin Real Estate. NY Standard Operating Procedures

New Mexico Real Estate Licenses

TREC: Info About Brokerage Services, Consumer Protection Notice

All mortgage lending products and information are provided by Rocket Mortgage, LLC | NMLS #3030; www.NMLSConsumerAccess.org. Licensed in 50 states. This site is not authorized by the New York State Department of Financial Services for mortgage solicitation or loan applications activities related to properties located in the State of New York.

Redfin Corporation is an affiliated business of Rocket Limited Partnership. Each company, and their subsidiaries, are separate legal entities operated and managed through its own management and governance structures.

If you are using a screen reader, or having trouble reading this website, please call Redfin Customer Support for help at 1-844-759-7732.

REDFIN IS COMMITTED TO AND ABIDES BY THE FAIR HOUSING ACT AND EQUAL OPPORTUNITY ACT. READ REDFIN'S FAIR HOUSING POLICY AND THE NEW YORK STATE FAIR HOUSING NOTICE.

GreatSchools Ratings provided by GreatSchools.org.