$1,580,000
OPEN SUN 2PM - 4PM

21504 Cold Spring Ln Diamond Bar, CA 91765

Estimated payment $9,526/month

4 Beds
3 Baths
2,712 Sq Ft
$583 Price per Sq Ft

Highlights

  • In Ground Pool
  • City Lights View
  • No HOA
  • Castle Rock Elementary School Rated A
  • Main Floor Bedroom
  • Walk-In Pantry

About This Home

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.

Listing Agent

Allen Shi

Wetrust Realty Brokerage Phone: 626-202-8703 License #02045433 Listed on: 05/30/2026

Open House Schedule

Home Details

Home Type

  • Single Family

Year Built

  • Built in 1977

Lot Details

  • 14,248 Sq Ft Lot
  • Back and Front Yard

Parking

  • 3 Car Attached Garage
  • Electric Vehicle Home Charger

Property Views

  • City Lights
  • Mountain

Home Design

  • Entry on the 1st floor

Interior Spaces

  • 2,712 Sq Ft Home
  • 2-Story Property
  • Entrance Foyer
  • Family Room with Fireplace
  • Living Room
  • Walk-In Pantry

Bedrooms and Bathrooms

  • 4 Bedrooms | 1 Main Level Bedroom
  • Walk-In Closet
  • Jack-and-Jill Bathroom
  • 3 Full Bathrooms

Laundry

  • Laundry Room
  • Washer and Gas Dryer Hookup

Schools

  • Castle Rock Elementary School
  • South Pointe Middle School
  • Diamond Bar High School

Additional Features

  • In Ground Pool
  • Central Heating and Cooling System

Community Details

  • No Home Owners Association

Listing and Financial Details

  • Tax Lot 1
  • Tax Tract Number 32974
  • Assessor Parcel Number 8714002003

Home Details

Home Type

Single Family

Year Built

Built in 1977

Lot Details

0.33 Acres

Parking

3

Listing Details

  • Structure Type: House
  • Assessments: Yes
  • Inclusions: two Tesla Wall charger
  • Property Attached: No
  • View: Yes
  • Property Sub Type: Single Family Residence
  • Property Type: Residential
  • Parcel Number: 8714002003
  • Year Built: 1977
  • Special Features: OpenHouse

Interior Features

  • Fireplace: Yes
  • Living Area: 2712.00 Square Feet
  • Stories: 2
  • Common Walls: No Common Walls
  • Full Bathrooms: 3
  • Total Bedrooms: 4
  • Entry Level: 1
  • Fireplace Features: Family Room
  • Levels: Two
  • Main Level Bathrooms: 1
  • Main Level Bedrooms: 1
  • Price Per Square Foot: 582.60
  • Room Type: Jack & Jill, Walk-In Closet, Primary Bedroom, Walk-In Pantry, Laundry, Foyer, Kitchen, Living Room, Main Floor Bedroom, Family Room, Primary Bathroom

Exterior Features

  • View: Mountain(s), City Lights
  • Pool Features: In Ground, Private
  • Pool Private: Yes

Garage/Parking

  • Attached Garage: Yes
  • Garage Spaces: 3.00
  • Total Parking Spaces: 3.00

Utilities

  • Heating: Yes
  • Laundry: Yes
  • Heating Type: Central
  • Laundry Features: Gas Dryer Hookup, Individual Room, Washer Hookup
  • Sewer: Public Sewer
  • Water Source: Public
  • Cooling: Central Air
  • Cooling: Yes

Condo/Co-op/Association

  • Association: No
  • Senior Community: No
  • Community Features: Sidewalks

Schools

  • Elementary School: Castle Rock
  • High School: Diamond Bar
  • Middle Or Junior School: South Pointe
  • Elementary School #2: CASROC
  • High School2: DIABAR

Lot Info

  • Additional Parcels: No
  • Land Lease: No
  • Lot Features: Front Yard, Back Yard
  • Lot Size Sq Ft: 14248.00
  • Lot Size Acres: 0.3271
  • Latitude Manual: 33.96675600

Multi Family

  • Lease Considered: No
  • Lot Size Area: 14248.0000 Square Feet
  • Number Of Units Total: 1

Tax Info

  • Tax Lot: 1
  • Tax Tract Number: 32974

Map

Range of Values:

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Value Increase
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Percent Increase
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Adjusted for Inflation
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Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Tax History

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $11,512 $883,710 $431,324 $452,386
2024 $10,906 $866,383 $422,867 $443,516
2023 $10,599 $849,396 $414,576 $434,820
2022 $10,333 $832,743 $406,448 $426,295
2021 $10,140 $816,416 $398,479 $417,937
2019 $9,822 $792,203 $386,661 $405,542
2018 $9,412 $776,671 $379,080 $397,591
2016 $8,715 $746,514 $364,361 $382,153
2015 $8,769 $735,301 $358,888 $376,413
2014 $8,779 $720,898 $351,858 $369,040
Source: Public Records

Property History

Date Event Price List to Sale Price per Sq Ft Prior Sale
05/30/2026 05/30/26 For Sale $1,580,000 +125.7% $583 / Sq Ft
01/20/2012 01/20/12 Sold $700,000 -5.3% $258 / Sq Ft View Prior Sale
12/09/2011 12/09/11 Pending -- -- --
09/09/2011 09/09/11 Price Changed $738,888 -1.3% $272 / Sq Ft
08/28/2011 08/28/11 For Sale $748,888 -- $276 / Sq Ft
Source: California Regional Multiple Listing Service (CRMLS)

Purchase History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Type Sale Price Title Company
Grant Deed $700,000 Usa National Title Company
Grant Deed $294,500 Fidelity National Title Ins
Trustee Deed $303,740 Stewart Title
Grant Deed -- --
Grant Deed -- --
Source: Public Records

Mortgage History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Status Loan Amount Loan Type
Previous Owner $265,050 Seller Take Back
Source: Public Records

Source: California Regional Multiple Listing Service (CRMLS)

MLS Number: WS26113219

California Regional Multiple Listing Service (CRMLS)

APN: 8714-002-003

California Los Angeles County Diamond Bar 91765

21504 Cold Spring Ln, Diamond Bar, CA

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California Regional Multiple Listing Service (CRMLS) The multiple listing data appearing on this website, or contained in reports produced therefrom, is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. Information provided is for viewer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the viewer may be interested in purchasing. All listing data, including but not limited to square footage and lot size is believed to be accurate, but the listing Agent, listing Broker and CRMLS and its affiliates do not warrant or guarantee such accuracy. The viewer should independently verify the listed data prior to making any decisions based on such information by personal inspection and/or contacting a real estate professional.

Based on information from California Regional Multiple Listing Service, Inc. and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information

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Allen Shi
Listing Agent
Allen Shi
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Wetrust Realty
(909) 640-3909
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