Exceptional end-of-cul-de-sac home on over 1/3 acre (16,742 sqft) with a large, usable lot and ADU potential. Private setting with long driveway, impressive curb appeal, ample parking, a spacious side carport, and beautiful mature palm trees enhancing the front landscape. The expansive lot is ideal for an ADU, pool, or future expansion, and with the right vision, also offers potential for gated, estate-style living. Located within the distinguished Walnut Valley Unified School District and walking distance to Maple Hill Elementary, Chaparral Middle School, newly remodeled Maple Hill Park, and just minutes from Diamond Bar High School. Lovingly maintained by the same owner for over 40 years, this bright and spacious home features high ceilings, a wide staircase, fresh interior paint, hardwood and tile flooring, recessed LED lighting, wood shutters, many upgraded dual-pane windows, central A/C & heat, a durable tile roof, ADT alarm system with 12 sensors, and stainless steel mesh security screens by Crimsafe on selected doors and windows. The functional layout includes a formal living room and separate family room with fireplace opening to the kitchen, perfect for everyday living and gatherings. A separate laundry room and attached garage with direct kitchen access add everyday convenience. The kitchen features granite countertops, while the remodeled downstairs bathroom adds modern comfort. The spacious primary suite offers an expansive closet, dual sinks, and a large shower. French doors and a sliding door create seamless indoor-outdoor flow. The expansive backyard offers a wide covered patio spanning the back of the home, numerous mature fruit trees with abundant yearly harvests, and ample space for entertaining or relaxing. A unique opportunity to own a private and versatile property in one of Diamond Bar's most desirable neighborhoods.