Welcome to this stunning contemporary residence nestled within the prestigious 24-hour guard-gated Diamond Hill community in Diamond Bar. Boasting breathtaking city-light and mountain views, this exceptional home offers an impressive combination of elegance, comfort, privacy, and resort-style living. Featuring approximately 4,725 square feet of living space on an approximately 9,030-square-foot lot, one of the larger lots within the community, this beautifully appointed residence offers 5 bedrooms and 4.5 bathrooms. A desirable downstairs bedroom with a full bathroom provides excellent flexibility for guests, extended family, or a private home office. The spacious upstairs game room offers additional versatile living space. Step inside to a dramatic living room highlighted by soaring approximately 21-foot ceilings and a magnificent crystal chandelier. An elegant marble entry, beautiful maple wood flooring, and expansive interior spaces create a sophisticated yet welcoming atmosphere. An approximately 200-square-foot upstairs deck provides a wonderful setting to enjoy the surrounding views. The spacious backyard is designed for relaxation and entertaining, featuring a beautiful private swimming pool and decorative fountain that create a resort-like retreat. Additional highlights include a three-car attached garage and a separate laundry room. Enjoy the peace and privacy of this desirable guard-gated community while remaining conveniently located near shopping, dining, schools, and major freeways. A rare opportunity to own an exceptional Diamond Bar residence offering generous living space, beautiful views, an expansive lot, and resort-style amenities.