---
listing_id: CRTR25148967
status: Active
price: 1699000
beds: 0
baths_full: 0
baths_half: 0
sqft_living: 
sqft_lot: 69190
lot_acres: 1.588
year_built: 
property_type: Land
property_subtype: 
address: "23509 Ridge Line Rd"
city: Diamond Bar
state: CA
zip: 91765
county: "Los Angeles County"
lat: 33.9906382
lng: -117.8100316
days_on_market: 314
hoa_fee: 350
hoa_frequency: Monthly
garage_spaces: 0
list_agent: "Juliet Chung"
list_office: "Country Queen Real Estate"
list_agent_phone: "–"
list_agent_license: 01887530
mls_source: CRMLS
modified: 2026-04-24
transaction_type: buy
---

Home | Los Angeles County | Diamond Bar | 91765 | 23509 Ridge Line Rd

23509 Ridge Line Rd, Diamond Bar, CA 91765

MLS: CRTR25148967 | Status: Active | Price: $1,699,000
Beds/Baths: – / –
Property Type: Land

Quick Facts

Beds Baths Sq Ft Acres Lot Yr Built
1.588

Remarks

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, eno

MLS Listing Information

Field Value
MLS # CRTR25148967
MLS Source California Regional MLS
Days on Site 314

Features

Parking, School, and Other Information

Feature Details
HOA Fee $350
HOA Fee Frequency Monthly
Zoning LZ, LS, SS

Lots & Land Information

Feature Details
Fencing Other

Contact Information

Listing Agent Co-Listing Agent
Juliet Chung Diana Cheng
Country Queen Real Estate Country Queen Real Estate
License #: 01887530 License #: 00856071
Phone: – Phone: (909) 208-4040

School Ratings

School data provided by GreatSchools.org

Nearby Schools

School Type Grades Distance Rating
Quail Summit Elementary School public K-5 0.30 mi 9
Chaparral Middle School public 6-8 0.57 mi 10
Maple Hill Elementary School public K-5 0.94 mi 10
Evergreen Elementary School public K-5 1.60 mi 9
Pantera Elementary School public K-6 1.76 mi 10
Lorbeer Middle School public 7-8 1.82 mi 5
Diamond Bar High School public 9-12 1.91 mi 10
Armstrong Elementary School public K-6 2.16 mi 5
South Pointe Middle School public 6-8 2.21 mi 10
Castle Rock Elementary School public K-5 2.30 mi 10
Golden Springs Elementary School public K-6 2.43 mi 7
Walnut Valley Adult public UG 2.61 mi N/A
Walnut Elementary School public K-5 2.63 mi 9
Diamond Ranch High School public 9-12 2.81 mi 8
Ron Hockwalt Academies (Continuation) School public 9-12 2.96 mi N/A
Walnut High School public 9-12 3.16 mi 10
Hidden Trails Elementary School public K-6 3.18 mi 10
Country Springs Elementary School public K-6 3.26 mi 10
Suzanne Middle School public 6-8 3.27 mi 10
Ranch Hills Elementary School public K-6 3.40 mi 7

Nearby Homes

Address Price Beds Baths Sq Ft Status
2578 Braided Mane Dr $1,480,000 Active
22586 Pacific Ln $1,750,000 Active
3121 Steeplechase Ln $1,680,000 Active
22104 Rim Fire $1,500,000 Active

Disclosures

©2026 California Regional MLS. All rights reserved. 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. Information provided is for personal, non-commercial use by the viewer and may not be redistributed without explicit authorization from California Regional MLS.

Presently MLSListings.com displays Active, Contingent, Pending, and Recently Sold listings. Recently Sold listings are properties which were sold within the last three years. After that period listings are no longer displayed in MLSListings.com. Pending listings are properties under contract and no longer available for sale. Contingent listings are properties where there is an accepted offer, and seller may be seeking back-up offers. Active listings are available for sale.

This listing information is up-to-date as of April 24, 2026. For the most current information, please contact Juliet Chung.