Set on 5 peaceful acres just minutes from Amherst Center, this exceptionally preserved 1956 Mid-Century Modern home by pioneering architect/builder Carl Koch is a rare Techbuilt offering. Thoughtfully maintained and sensitively updated, the home reflects Koch's signature emphasis on light, openness, and connection to the landscape. Original architectural details remain beautifully intact, including cathedral ceilings, exposed beams, a dramatic split-level stair, plate-glass windows, built-ins throughout, period lighting, and slate, tile, and wood flooring. The spacious layout offers 4 bedrooms, 3 full baths, a private office with built-ins, expansive living spaces, and a 30-foot deck overlooking serene woodland. A flexible fourth bedroom with garage access suits guests, studio, or work-from-home use. The primary suite features a walk-in closet and skylit bath. Convenient to Amherst, UMass, walking trails, and Leverett Pond, this is a rare opportunity to own an authentic modernist home.