Perched on one of Altadena's most coveted view lots, this exceptional mid-century modern residence was originally commissioned by Helen M. Heard and masterfully designed by the acclaimed architectural firm Buff, Smith and Hensman. Thoughtfully reimagined by the current owners, the home has undergone a meticulous, design-forward refurbishment--including the addition of a fourth bedroom by the original firm--honoring its architectural pedigree while elevating it for modern living.From the moment you enter, classic mid-century design reveals itself through clean lines, warm materials, and a seamless connection to the outdoors. Spanning four bedrooms and three bathrooms, the open-concept layout is filled with natural light and crafted for effortless indoor-outdoor flow.A dramatic step-down living room serves as the heart of the home, anchored by slate steps, a striking rock fireplace, and soaring mahogany-paneled vaulted ceilings. Expansive walls of glass frame sweeping views, with the San Gabriel Valley providing a breathtaking backdrop to the lush, water-wise landscaped grounds and fully renovated pool and spa.The private primary suite is a true retreat, featuring vaulted mahogany ceilings, walls of glass, and serene views of both the backyard and city beyond. Custom built-ins--including a headboard, nightstands, and cabinetry--enhance the home's authentic mid-century aesthetic. The spa-inspired primary bath is filled with natural light and offers dual sink areas, a dedicated vanity, and a separate tiled tub and shower.The fully renovated kitchen showcases all-new appliances, sleek floating shelving, and refined, clean-lined finishes with maple cabinetry and pure white quartz countertops. It flows seamlessly into the dining area, where a half wall of built-in maple cabinetry provides both function and understated elegance while subtly defining the space.Additional amenities include terrazzo flooring, decorative block wall, solar panels, Lutron lighting throughout, skylights, an alarm system, a finished garage, built-in speaker readiness, fire sprinklers, and a new roof (2026).A rare offering that combines architectural significance, thoughtful updates, and stunning views--this is Altadena living at its finest.