Tucked away on an exclusive private road shared by only one other residence, this exceptional South Hills estate offers a rare combination of privacy, scale, and timeless character on an expansive 44,000+ sq ft lot. Surrounded by mature trees and hillside views, the property features one of the largest interior living spaces in the neighborhood, complemented by a long private driveway with architectural stairways leading into the hillside areas, and an enormous backyard designed for both entertaining and everyday living. The thoughtfully designed floor plan offers spacious living across two levels, including a downstairs primary suite with direct backyard access, dual vanities, an oversized walk-in closet, and convenient adjacent laundry room. The main level also features a dedicated office with custom built-in bookshelves which can be converted into a 5th bedroom if needed, a formal living room with a classic brick fireplace, formal dining room, and an impressive family room with vaulted wood-beam ceilings and skylights that fill the space with natural light. The expansive kitchen includes a breakfast nook, abundant cabinetry, and seamless flow into the main gathering areas. A secondary downstairs bedroom and full bath provide additional flexibility for guests or multigenerational living. Upstairs features two generously sized secondary bedrooms connected by a Jack & Jill bathroom, along with a versatile den ideal for a study area, reading lounge, or additional workspace. The private backyard retreat offers a covered patio with ceiling fan, sparkling pool, sauna room and sprawling grounds. Additional highlights include a 3-car garage, custom oversized Anderson windows and sliding doors, hardwood and granite flooring, and no HOA. Ideally located within walking distance to the South Hills Country Club and golf course, nearby parks, shopping, restaurants, and top-rated South Hills schools. Convenient access to the 10 and 60 freeways, and just minutes from California State Polytechnic University, Pomona and Mt. San Antonio College.