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1423 Copper Mountain , Diamond Bar, CA 91765
$1,249,888
Est. Payment: $6,620.23/mo
4 Bed
3 Bath
2380 Sqft
Status: Active Under Contract | Days on site: 58
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PB22792 - HCASTSAM
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Chris Heller
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House Description

Nestled on a quiet cul-de-sac in the highly desirable city of Diamond Bar, 1423 Copper Mountain offers the perfect blend of modern upgrades, privacy, energy efficiency, and top-rated schools. Located within walking distance to highly acclaimed Quail Summit Elementary and situated in the award-winning Walnut Valley Unified School District, this beautifully maintained home checks all the boxes for today’s buyers. This turnkey property is currently being refreshed with new interior, exterior paint, upgraded PEX plumbing throughout the home complementing the home’s updated kitchen and modern contemporary feel throughout. From the moment you walk in, you’ll notice the pride of ownership and attention to detail that make this home truly move-in ready. Step outside into your own private backyard retreat featuring mature fruit trees, peaceful surroundings, and scenic city light views. Whether you’re entertaining guests, enjoying your morning coffee, or relaxing after a long day, this backyard offers the perfect combination of tranquility and functionality. One of the standout features of this home is the fully paid solar system, helping dramatically reduce electricity costs year-round — a huge benefit for California homeowners looking for energy-efficient living and long-term savings. Outdoor enthusiasts will appreciate the close proximity to local hiking and walking trails, while the nearby Diamond Bar Center offers community events, concerts in the park, weddings, and year-round entertainment just minutes away. Conveniently located near shopping, dining, parks, and easy freeway access, this home combines suburban comfort with everyday convenience. If you’ve been searching for a modern upgraded home in Diamond Bar with views, paid solar, privacy, excellent schools, hiking trails, and a prime cul-de-sac location, this is one you do not want to miss. Walnut Valley Unified School District Quail Summit Elementary Paid solar home Cul-de-sac home City light views Turnkey home Modern upgrades Private backyard Fruit trees Hiking trails nearby Energy-efficient home Move-in ready Diamond Bar real estate Quiet neighborhood Family-friendly neighborhood
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Highlights

Listed by Samuel Castorena , 626-253-5129 Samuel G. Castorena Jr , 626-253-5129. CRMLS/Multi-Regional MLS mls logo

Property Type

Residential
Lot/Acreage
0.16

Year Built

1978

County

Los Angeles

Area

616 - Diamond Bar

 School District

Walnut Valley Unified

Listing ID

TR26115009

Questions about this listing?

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Interior Features

Bedrooms and Bathrooms
  • ▪ Bedrooms:4
  • ▪ Bathrooms:3
  • ▪ Full Bathrooms:3
Air Cond:Central Air
Fireplaces:Family Room
Other:
  • ▪ Additional:Open Floorplan
Water:Public

Exterior Features

Lot:0-1 Unit/Acre,No Land Lease
Garage Capacity:2
Others:
  • ▪ Additional:Copper Plumbing
Sewer:Public Sewer
Principal Interest
$6,620
Taxes
$797

Home Price

$1,249,888

Loan Details

30 yrs
6.952%

Down Payment

20%
$249,978
All calculations are estimates and provided by Blueroof360. Today’s Rates provided by Blueroof360. Information and interactive calculators are made available to you only as self-help tools for your independent use and are not intended to provide investment or tax advice. We cannot and do not guarantee their applicability or accuracy in regards to your individual circumstances. All examples are hypothetical and are for illustrative purposes. We encourage you to seek personalized advice from qualified professionals regarding all personal finance issues.
Monthly Price:
$6,620.23

Principal

Taxes

Principal Taxes HOA Total
Monthly $6,620.23 $796.80 $0.00 $7,417.03
Yearly $79,442.72 $9,561.64 $0.00 $89,004.36
Total $2,383,281.49 $286,849.30 $0.00 $2,670,130.79

Today's Rates

30 Year

6.95%

20 Year

6.73%

15 Year

6.35%

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Market insight data is pulled from the same city as the listing being viewed (Diamond Bar, CA).

The schools listed are within a 2-mile radius of the property; however, attendance is not guaranteed. Please contact the local school district to confirm zoning and enrollment options.

Based on information from California Regional Multiple Listing Service, Inc. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent. All properties are subject to prior sale, change or withdrawal.

IDX service by Blueroof 360

Data last updated: 2026-09-23T15:01:48.000Z

© 2026 CRMLS/Multi-Regional MLS

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