28850 Countryside Dr Rarely available in Countryside Estates, this beautifully maintained English Country estate sits on a flat, fully usable acre in a peaceful setting surrounded by the natural beauty of the Santa Monica Mountains. Lovingly cared for by the same family for decades, the property offers exceptional privacy, space, and flexibility while remaining close to everyday conveniences and the coast. The approximately 5, 000-square-foot residence offers 6 bedrooms and 7 bathrooms, with spacious, light-filled living areas designed for comfortable living and easy entertaining. Recent updates include new flooring in the living room and new carpet in the primary suite. Two separate guest houses provide outstanding versatility for extended family, guests, home offices, or creative space, creating a rare multi-structure, compound-style opportunity. The grounds feature a pool, spa, and sports court with a new overhang, along with expansive usable land and mature landscaping. The backyard enjoys open mountain views and beautiful sunset exposure, creating a private, nature-filled setting. A rare 7-car garage plus dedicated RV parking offers exceptional flexibility for vehicles, recreation, or storage. Energy features include owned solar (52 panels) and a 26kW Generac Guardian whole-home generator. Located in the sought-after Countryside/Cornell area near Paramount Ranch, the property offers a unique balance of privacy and accessibility just minutes to the 101 freeway, shopping and dining in Agoura and Westlake Village, and approximately 15 minutes to the beaches of Malibu.