Enjoy beautiful mountain views by day and sparkling city lights by night from this lovely home nestled in the desirable hills of Diamond Bar, complete with a private pool perfect for relaxing or entertaining. Energy-efficient upgrades include fully paid-off solar, two Tesla EV charging stations, an electric water heater, a whole-house water softener system, newer roof, and newer A/C. The bright and airy layout features soaring high ceilings in the living room, abundant natural light, a desirable downstairs bedroom, and a spacious 3-car garage. Located within the award-winning Walnut Valley Unified School District with top-rated 10/10 schools, and just minutes from Diamond Hills Plaza featuring H Mart, popular dining, shopping, and everyday conveniences. NO HOA.
Property Details
Price:
$1,580,000
MLS #:
WS26113219
Status:
Active
Beds:
4
Baths:
3
Type:
Single Family
Subtype:
Single Family Residence
Neighborhood:
616diamondbar
Listed Date:
May 30, 2026
Finished Sq Ft:
2,712
Lot Size:
14,248 sqft / 0.33 acres (approx)
Year Built:
1977
See this Listing
Schools
School District:
Walnut Valley Unified
Elementary School:
Castle Rock
Middle School:
South Pointe
High School:
Diamond Bar
Interior
Bathrooms
3 Full Bathrooms
Cooling
CA
Heating
CF
Laundry Features
GAS, IR, WH
Levels
U
Main Level Bathrooms
1
Main Level Bedrooms
1
Exterior
Attached Garage YN
1
Common Walls
NCW
Community Features
SDW
Garage Spaces
3
Parking Spots
3
Parking Total
3
View
CI, MT
Financial
Map
Community
- Address21504 Cold Spring LN Diamond Bar CA
- CityDiamond Bar
- CountyLos Angeles
- Zip Code91765
Market Summary
Current real estate data for Single Family in Diamond Bar as of Jun 14, 2026
113
Single Family Listed
76
Avg DOM
466
Avg $ / SqFt
$1,608,671
Avg List Price
Property Summary
- 21504 Cold Spring LN Diamond Bar CA is a Single Family for sale in Diamond Bar, CA, 91765. It is listed for $1,580,000 and features 4 beds, 3 baths, and has approximately 2,712 square feet of living space, and was originally constructed in 1977. The current price per square foot is $583. The average price per square foot for Single Family listings in Diamond Bar is $466. The average listing price for Single Family in Diamond Bar is $1,608,671.
Similar Listings Nearby
Courtesy of Wetrust Realty. Disclaimer: All data relating to real estate for sale on this page comes from the Broker Reciprocity (BR) of the California Regional Multiple Listing Service. Detailed information about real estate listings held by brokerage firms other than include the name of the listing broker. Neither the listing company nor shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. The Broker providing this data believes it to be correct, but advises interested parties to confirm any item before relying on it in a purchase decision. Copyright 2026. California Regional Multiple Listing Service. All rights reserved.21504 Cold Spring LN
Diamond Bar, CA