This unique, beautifully upgraded lease in the hills of Fullerton offers the perfect, private home to enjoy! Hidden at the end of a tree-lined driveway of a gorgeous gated home on a cul-de-sac in the foothills of Fullerton, the guest house combines the pleasures of a sprawling estate with the privacy of a detached ADU. Vaulted ceilings highlight the open living room space, which offers more than enough room to entertain guests. Adjacent to the large family room is a stunningly upgraded kitchen, which features custom cabinetry with soft-close hinges, quartz countertops, and stainless steel appliances, including a gas stove, oven, over-the-range microwave, dishwasher, refrigerator, and freezer. The beautiful full bathroom includes a walk-in shower, toilet, upgraded sink, and separate vanity area. An indoor washer and dryer add to the amenities of this property. The downstairs bedroom suite offers a large amount of space for furniture and a home office. A walk-in closet and en-suite bathroom add to the convenience of living in this property. An attached garage with tandem parking offers ample storage space and room for multiple cars. To finish off the ADU, a private patio looks out to the pool, tennis court, and trees of the property, making it the perfect place to unwind after a long day. You'll love living in this secluded neighborhood, which is in a premium location near Cal State University Fullerton, the Fullerton Arboretum, the Brea Mall, fine dining, entertainment, and shopping, as well as easy access to local freeways. Outdoor enthusiasts will enjoy the wide variety of hiking/walking trails throughout the area. Don't let this one-of-a-kind opportunity pass you by! Please Note: The homeowner has two dogs that have access to the yard around the guest house. ALL UTILITIES AND CABLE/INTERNET ARE INCLUDED.