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$4,000,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 6 Beds
  • 5 Full Baths
  • 5,797 Sq. Ft.
  • 6 Car Garage
  • Updated 6 hours ago
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STUNNING DIAMOND BAR ESTATE WITH PANORAMIC VIEWS! Welcome to luxury living in an exclusive gated community in the prestigious Diamond Bar Hills. This immaculate estate offers breathtaking mountain views, soaring vaulted ceilings, beautiful hardwood floors, and an open, light filled floor plan. The gourmet kitchen features quartz countertops, oversized island, stainless-steel appliances, and a stunning glass tile backsplash. The spacious primary suite offers panoramic views and a private wrap-around balcony. Step into your own resort style backyard with a sparkling pool & spa, waterfall grotto, hot tub, built-in BBQ, and gazebo perfect for entertaining or relaxing. A guest house and private gym add even more versatility. Located near premier golf, dining, fitness, and highly acclaimed Walnut Valley Unified schools. Privacy. Luxury. Views. Resort-style living. This exceptional Diamond Bar estate is one you won't want to miss!

Full Property Details for 1809 Diamond Knoll

General

  • Price: $4,000,000
  • HOA FEE: $308/month
  • Status: Active
  • Type: Single Family
  • Source: MRMLS
  • MLS ID: DW26217188
  • Updated: 10/7/2026
  • Days on Market: 1 days
  • Added to Site: 1 day(s) ago

Interior

  • Rooms/Areas: Main Floor Bedroom
  • Fireplace: Yes
  • Fireplace(s): Primary Bedroom, Living Room, Family Room

Rooms

Bathrooms

  • Total Bathrooms: 5
  • Full Bathrooms: 5

Bedrooms

  • Total Bedrooms: 6

Other Rooms

  • Laundry: Individual Room

Additional Information

  • Shared Amenities: Guard, Pickleball, Sauna, Pool, Firepit, Barbecue, Clubhouse, Spa/Hot Tub, Security
  • Pool: Yes
  • Pool Description: In-Ground, Private

Parking

  • Garage: Yes
  • Garage Spaces: 6

Location

  • County: Los Angeles
  • Driving Directions: Grand X S. Diamond Bar Blvd

School Information

  • School District: Walnut Valley Unified

Community

  • Community Features: Hiking
  • Assoc. Name: Seabreeze

Heating & Cooling

  • Cooling Type: Central Air
  • Heating Type: Central

Utilities

  • Sewer: Sewer Paid
  • Water: Public

Structural Information

  • Structure Type: Single Family Residence
  • Common Walls: No Common Walls
  • Entry Location: 1
  • Stories/Levels: Two
  • Stories Description: Two
  • Square Feet: 5,797
  • Sq. Ft. Source: Assessor
  • Year Built: 1992
  • Year Built Source: Assessor

Lot Features

  • Property View: Canyon
  • Lot Size (Acres): 1.0374
  • Lot Size (Sq. Ft.): 45,189
  • Lot Size Source: Assessor
  • Lot Description: 0-1 Unit/Acre

Financial Considerations

  • Price Per Sq. Ft.: $690.01
  • Association Fee: $308
  • Assoc Fee Freq.: Monthly

Disclosures and Reports

  • Special Conditions: Standard

Listed by Lux Bancorp, Monica De La Riva

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Listing agent

— 1809 Diamond Knoll —

  • Monica De La Riva

    Lux Bancorp

714-552-4222

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 1809 Diamond Knoll

School District:Walnut Valley Unified School District
NameGradesDistance
Evergreen Elementary School, Diamond Bar, CA
2450 S. Evergreen Springs, Diamond Bar, CA 91765
K-51.9 mi
Chaparral Middle School, Diamond Bar, CA
1408 Spruce Tree Drive, Diamond Bar, CA 91765
6-80.7 mi
Diamond Bar High School
21400 Pathfinder Road, Diamond Bar, CA 91765
9-122.3 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 1809 Diamond Knoll Get Price Alerts and Save Property

Date
Details
Price
Change
Source
10/06/2026
Listed
$4,000,000
14.29%
MLS
1/30/2022
Sold
$3,500,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 1809 Diamond Knoll

Year
Property Taxes
Change
Tax Assessment
Change
2025
$45,348
—
$3,788,512
2%
2025
$45,348
7%
$3,714,228
4%
2023
$42,368
12%
$3,570,000
13%
2022
$37,692
2%
$3,172,068
2%
2021
$37,015
1%
$3,109,872
1%
2020
$36,541
2%
$3,077,985
2%
2019
$35,833
4%
$3,017,633
2%
2018
$34,365
5%
$2,958,464
2%
2017
$32,753
3%
$2,900,456
2%
2016
$31,819
-1%
$2,843,586
2%
2015
$32,033
—
$2,800,874
2%
2014
$32,052
1%
$2,746,009
—
2013
$31,823
—
$2,733,600
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 1809 Diamond Knoll

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*These costs are estimates, and the interest rates assume exceptional credit standing.

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

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Listed by Lux Bancorp, Monica De La Riva

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1809 Diamond Knoll, Diamond Bar, CA 91765 (MLS# DW26217188) is a Single Family property with 6 bedrooms and 5 full bathrooms. 1809 Diamond Knoll is currently listed for $4,000,000 and was received on October 06, 2026. Want to learn more about 1809 Diamond Knoll? Do you have questions about finding other Single Family real estate for sale in Diamond Bar? You can browse all Diamond Bar real estate or contact a Coldwell Banker agent to request more information.

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