Stunning duplex residence located on the prestigious, sun-drenched first block of Commonwealth Avenue. This exceptional home offers 3,500 sq ft of refined living space across two thoughtfully designed levels, blending grand scale with timeless architectural elegance. The main level is filled with natural light and features dramatic floor-to-ceiling windows and soaring 13 ft ceilings, creating an extraordinary setting for entertaining. Custom built-ins and high-end finishes enhance the home's sophistication throughout. The primary suite, ideally located on the main level, provides a luxurious private retreat with a fireplace and dual en-suite marble bathrooms. Two additional spacious bedrooms offer their own en-suite baths, ensuring comfort and privacy for guests. Additional highlights include direct elevator access, private outdoor patio ideal for entertaining and attached garage parking for one car. A rare opportunity to enjoy luxury living in one of Boston's most coveted addresses!