Set on ¾ of an acre in central Piedmont, 331 Hillside Avenue offers rare estate scale, spectacular views, and the quality and infrastructure of a newly built home. Originally constructed in 1906, the residence was comprehensively rebuilt over three years, with a new seismic foundation, structural steel, shear walls, and entirely new systems, fixtures and finishes. A marble entry leads to a hand-forged staircase connecting all three levels. The living room features a see-through fireplace shared with the solarium and opens to an ipe wood balcony overlooking the pool. The elegant dining room captures bay and city views, while the private study is adjacent to the solarium. The exceptional kitchen features luxury finishes, top-end appliances, and a banquette, opening to the family room and outdoor deck with heaters and BBQ. The upper level includes four en suite bedrooms. The luxurious primary suite offers a sitting room, office, fireplace, dual dressing rooms and marble bath to capture the view. A spacious laundry and dedicated craft room complete the level. Designed for entertaining, the lower level features a theater, game area, custom bar, and a glass-enclosed, temperature- controlled wine cellar. A fitness area, music room, ½ bath and French doors lead to the pool deck. A private guest/au pair suite with full bath and exterior entrance completes the level. The grounds are extraordinary: a pool with spa, limestone terrace, fire pit with panoramic views, bocce court, sport court, raised gardens, fruit and olive trees, and chicken coop. A separate guest house offers a bedroom, living room with fireplace, full kitchen, bath and laundry, with bi-fold doors opening to a porch overlooking San Francisco. The home's infrastructure includes owned solar, UPS electrical backup plus 3 Tesla Powerwalls, two EV charging locations, whole-property wifi and Sonos. A four-car garage includes a half bath and workshop. Conveniently located in central Piedmont, it's top-rated schools, the center of town. the new state-of-the-art community pool, Recreation Center and tennis courts.