A Mid-Century Masterpiece, rarely offered and highly sought after, 31 Auchmar Road is an architectural treasure on one of Hamilton's most desirable streets. Designed in 1963 by acclaimed Harvard architect Joseph Bogdan, The Ranalli House exemplifies award-winning mid-century modern design with timeless character that has only grown more captivating with age. The striking façade features clerestory and vertical embrasure windows, while the seamless indoor-outdoor connection highlights sculptural precision and modernist elegance. Interiors showcase original German polished stone floors, soaring 11-foot ceilings, and a dramatic floating staircase with exposed brick and stained-glass accents. The flowing main floor connects formal and casual living spaces, complemented by two gas fireplaces and a custom kitchen with Sub-Zero appliances. Nearly 4,000 sq. ft. includes 6 bedrooms and 4 bathrooms, featuring a main-floor primary retreat with spa-inspired ensuite and walk-in closets. Upstairs offers flexible office or secondary living space alongside family bedrooms and laundry. The backyard is a private modern oasis with a heated concrete pool, diving board, waterfall feature, oversized pergola with built-in Wolf BBQ, granite patios, stone decking, and ambient lighting. Additional highlights include a finished lower level with gym/recreation area, upgraded roof system, and double car garage with epoxy floors. Steps from Hillfield Strathallan College, top schools, hospitals, Bruce Trail, and Locke Street dining, 31 Auchmar Road offers unmatched architecture in a setting of convenience and prestige - a once-in-a-lifetime mid-century modern opportunity.