Situated on a massive lot of 18.9 acres. There are less than a handful of residential lots of this size in the entire San Gabriel Valley! Very private and quiet location. Located in the luxury custom home neighborhood of Emerald Hills Estates, Long private gated driveway. Pride of ownership! The owner is a Remarkable Inventor / Successful Entrepreneur / Artist / Designer. The home was built in 1994, Approx 11,005 sqft of living space. Very well designed floor plan. 7 bedrooms & 7 bathrooms, 1 bedroom suite & 1 guest bath on the 1st floor, 6 bedrooms on 2nd floor, 5 of the 7 bedrooms are suites. Large formal entry with twin staircases, Large formal living room, Large family room with wet bar, Spacious formal dining room, Spacious kitchen with built-in stainless steel appliances and custom stainless steel cabinet doors, breakfast area and walk-in pantry, There is also a covered full kitchen outside with plenty of space for cooking, serving and seating large gatherings. Outside: Oversized custom pool/spa with full bathroom, multiple fountains, gazebo, full sized lighted tennis court, observation deck, Huge hanger style steel building, 4 car garage with carport, plenty of parking for guests, RV and other toys, Energy saving Solar system. ZONING IS RPD! Please contact the City of Walnut regarding the possibility of development. Award winning Walnut School District. Close to shopping, Parks, Walnut City Hall, Walnut Library, Walnut Senior center, Walnut Teen center and more.