
Diamond Bar, California 91765
Analysis of 22588 Ridge Line Road, Diamond Bar, California 91765 is currently available with a list price of $7,990,000. The property maintains a Good Condition Rating (78/100), reflecting solid structural condition with well-maintained systems. The property presents an attractive opportunity for buyers seeking a move-in ready home. Located in a high-demand neighborhood within the Diamond Bar Unified School District, this asset is categorized as a low-risk, high-reward acquisition suitable for both Buy-and-Hold Investors and Owner-Occupants willing to undertake light renovation work.
Property is move-in ready.
Built in 2008, this 17,000-square-foot estate is in well-maintained, move-in ready condition. It features high-end materials including polished marble floors, grand dual staircases, and a gourmet kitchen with professional-grade stainless steel appliances and granite countertops. While the property is luxurious and functional, the cabinetry styles and interior finishes reflect the original construction era rather than a recent full renovation, fitting the criteria for a property built within the 10 to 20-year range.
Elementary School: Quail Summit Elementary School (9/10). High School: Diamond Bar High School (10/10).
Boasting over 17,000 square feet with 11 bedrooms and a 10-car garage, this estate offers unparalleled space for large-scale entertaining and multi-generational living.
Situated in the prestigious guard-gated 'The Country Estates' and served by the top-rated Walnut Valley Unified School District, the property ensures both high-level security and access to premier education.
The massive square footage and expansive 1.2-acre grounds will necessitate significant ongoing costs for maintenance, utilities, and staffing to preserve the estate's condition.
The sheer size and specific configuration of 11 bedrooms cater to a very narrow buyer demographic, which may result in a more extended listing period compared to standard luxury homes.
Luxurious 17,000-square-foot mansion located in the renowned “The Country Estates.” This efficiently designed residence features nine generously sized en-suite bedrooms, along with two huge primary suites and two powder rooms on the main level, totaling 11 bedrooms and 13 bathrooms. Situated on approximately 1.2 acres of well-maintained landscaping, the home captures breathtaking views of city lights and scenic hills from multiple vantage points. Upon entry, you’re welcomed by polished marble floors, soaring vaulted ceilings, and an impressive foyer with a dual staircase. The main level open-concept living areas create a bright and inviting atmosphere, ideal for both everyday living and entertaining and are equipped with two powder rooms and a bar area that’s perfect for hosting guests. The gourmet kitchen is designed for both functionality and style, featuring a large island, an oversized butler’s pantry, and additional high-end features to support daily living and entertaining needs. An elevator adds convenience and accessibility throughout the home. The ten-car garage provides ample space for large households or car enthusiasts. Additional interior highlights include a private game room, home theater, and a dedicated meditation room. The backyard offers an Italian villa-inspired retreat, designed for relaxation and complete with a Pool, Spa, BBQ station. Carefully crafted, this home blends refined elegance with everyday comfort. Located in a highly sought-after community with top-rated schools, the HOA includes 24-hour guard-gated security and amenities such as a community pool and spa, tennis courts, a clubhouse, and more. Come experience everything this exceptional property has to offer.
No exterior & parking available.
Grades K-5 • 0.8 mi
Grades K-5 • 1.0 mi
Grades K-5 • 1.4 mi
No sensitive facilities data found.
| Feature | Subject | Average Home | Neighborhood Ranking (50 Listings) |
|---|---|---|---|
| Beds | 11.0 | 4.0 | 99% |
| Baths | 13.0 | 3.0 | 99% |
| Square foot | 17,241 | 2,079 | 99% |
| Lot Size | 53,347 | 9,819 | 97% |
| Price | $7.99M | $1.21M | 98% |
| Price per sq ft | $463 | $592 | 8% |
| Built year | 2008 | 1977 | 98% |
| HOA | $308.0 | $0 | 92% |
| Days on market | 26 | 167 | 1% |
Mar 27, 2026
$7,990,000
Initial Listing
Sep 16, 2009
$5,000,000
Public Record
Jun 9, 2000
$690,000
Public Record