There is no other address in Boston like this top-floor penthouse: a private rooftop cupola with 360 downtown skyline views, atop an 1893 Colonial Revival estate landmark fully reimagined in a 2026 gut renovation, three miles from downtown. Unit 3 rises five levels to 613 SF of private outdoor space - a 353 SF roof deck, a 110 SF octagonal cupola, and two private balconies - an outdoor sequence no Boston condominium at any price offers. 2,430 SF, 3 all-ensuite bedrooms, plus a library/office.Brown Fenollosa Architects designed the five-level configuration; Webb Structural Engineering's comprehensive structural rehabilitation - executed from rooftop deck to new foundation footings - introduces the full strength of modern structural engineering into a building whose Colonial Revival exterior remains intact. A RESNET-certified HERS score of 65, roughly half the energy use of a typical resale home, backed by Panasonic ERV and 3-zone HVAC systems with ductless heat pumps.Cambridge new construction occasionally includes a roof deck, but none pair it with a cupola and full skyline views. Elfa closets throughout and a primary double vanity; the kitchen pairs Wolf and Bosch appliances, finished in quartz. Access to the shared Olmsted-designed estate gardens with fire pit terrace below and an exclusive-use outdoor patio with direct access to deeded garage.It is a genuine smart home too: dual HDR video doorbells, AI-monitored Nest Cam floodlights, Schlage Encode Plus locksets with Apple Home Key tap-to-unlock, and zoned Nest Learning Thermostats. A detached garage plus a deeded surface space - most Boston condominiums at this price offer one spot or none. Just 10 minutes to the Longwood Medical Area, a fraction of the distance from Back Bay, Brookline, Newton, or Cambridge.