Perched at the intersection of Castro and Newburg Streets, this elegant Noe Valley residence enjoys a rare sense of openness, privacy, and cinematic outlooks across all three levels. With the rear boundary directly abutting the Duncan-Castro Open Space, the home feels uniquely serene, lush, protected, and remarkably quiet, yet remains just moments from the vibrant shops, cafes, and restaurants of both 24th and Castro Streets. Originally built in the 1940s and thoughtfully expanded with a seamless third-story addition, the home blends classic architecture with modern livability. The upper level is dedicated to a luxurious primary retreat featuring sweeping downtown views, an expansive observation deck, spa-inspired bath, dual walk-in closets, and an adjacent office, creating a true sanctuary above the city. The main living level offers light-filled living and dining rooms with dramatic vistas, a wood-burning fireplace, and an effortless flow ideal for entertaining. The kitchen is appointed with marble countertops, stainless steel appliances, and a charming breakfast room, while two well-proportioned bedrooms and a full bath complete the level. The lower level provides exceptional flexibility with a fourth bedroom, full bath, den, secondary kitchenette, and a separate street entrance, ideal for guest quarters, au-pair living, or extended family use. Outdoor spaces include a sun-filled rear deck with hot tub and tranquil green outlooks into the open space. Additional highlights include internal access to a two-car tandem garage with abundant storage and a laundry area. A rare opportunity to own a view-forward Noe Valley home that balances architectural integrity, flexibility, and an extraordinary setting.