Home with breathtaking 180 degree mountain, valley, and city light view located in prestigious Diamond Crest Gate Community. Award winning Walnut Valley school district, walking distance to South Pointe Middle School and Diamond Bar High. This gorgeous executive property has 5 bedrooms, 3.5 bathrooms, plus a home office/library downstairs. Double door entry leads to impressive grand foyer with cathedral high ceilings, mosaic marble flooring, and custom hardwood flooring & staircase. Formal dining room with recess lighting and mirrors. Luxurious living room and spacious family room with fireplace, and great view to the backyard. Gourmet kitchen with granite counter tops, island, custom cabinets, and walk-in pantry area. Second level has 4BR Including magnificent master bedroom with panoramic mountain and city lights views, spacious two walk-in closet, over sized bathtub, and separate shower. One of the tandem garage has been converted to additional suite room downstairs (approx 270 sq ft not included, Total:3923 sq ft). The owner spent over $300,000 on landscaping alone.