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Diamond Bar, CA

$1,699,000

23509 Ridge Line Road, Diamond Bar, CA
350
Days listed

About this home

Located in the prestigious 24hr guard-gated “The Country Estates” community, this beautiful proposed contemporary residence that is nestled in a highly sought-after location boasting panoramic city lights and mountain views, is graded and ready for construction to be customized and completed by the new owner. Proposed plans for a stunningly perfect contemporary resort-style estate boasting 5 bedroom suites, 7 bathrooms, and approx. 8,000 sqft of pristine and sumptuous living space situated on 1.59 sprawling acres, this sophisticated modern haven’s offerings would be unlike anything in the community. The immaculate grounds and bountiful amenities—including appealing water features at the elegant main entrance, two exterior balconies, dual professional offices, a lush 8-seat theater, & a gym, a luxurious family rm, living rm - ALL 3 rms with fully openable sliding doors. Incredible luxurious, entertaining backyard boasts a gorgeous infinity edge pool and spa overlooking stunning city light views, BBQ and fire pit areas, and a kids' play area. This estate will offer the possibilities for countless memories. Building plans also include a gourmet chef's kitchen and a service kitchen, featuring a sizable pantry. The upper floor will have the master suite with large his/her closets, enormously lush bathroom, and fully openable sliding doors that lead to an exterior deck. A junior master suite will also feature a walk-in closet and bathroom along with access to an exterior balcony through fully openable sliding doors. The estate will feature a 4-car garage. The existing proposed plans can be modified and changed to the buyers' desire! Don’t miss this chance to custom build your dream home on a fully graded and finished lot! Builder is renowned construction company, Primior JYZ.

Facts & features

Exterior & lot
Lot size
1.588 acres (69,190 sq ft)
View
City Lights, Mountains, Panoramic
New construction
Yes
Community
Area
616 - Diamond Bar
County
Los Angeles
Community features
Horse Trails, Park, Suburban
HOA fee
$350/mo
Listing details
Status
Active
Property type
Land
Days on market
350
Listed
2025-07-02
Terms
Cash, Cash To New Loan, Conventional
Parcel #
8713004004
MLS #
TR25148967
Listed by
Juliet Chung · Country Queen Real Estate

Location

Price history

Listed
$1,699,000 · 2025-07-02
Days on market
350
Current price
$1,699,000
Financing

Could this home be yours?

Estimated monthly payment
$10,658
$8,591 principal & interest · $2,067 taxes & insurance
$339,800
Estimate only
Loan $1,359,200

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Listing data provided by CRMLS

Listing courtesy of Country Queen Real Estate. © 2026. The multiple listing data appearing on this website is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. Information provided is for the consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the consumer may be interested in purchasing. All data, including but not limited to 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. The listing broker's offer of compensation is made only to participants of the MLS where the listing is filed. Last updated July 26, 2026 Equal Housing Opportunity.

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