This rare, one-of-a-kind penthouse condo offers flexible open concept living on the coveted East Side. With dining, shopping, cafes, and groceries just steps from your door, there's no need to walk blocks or drive. What truly sets this condo apart are its soaring 15-foot cathedral ceilings and oversized windows with open exposures on three sides. This end-of-the-block location ensures privacy and abundant natural light from sunrise to sunset. Designer upgrades include new cabinetry, waterfall countertops, smart appliances, a workstation sink, professional ambient lighting, and high-end designer fans. End your day dining fireside or entertaining friends on your private deck. Prioritizing both comfort and functionality, the unit also features an upgraded HVAC system, in-unit storage solutions, and extra basement storage. 723 East 4th is a classic with black shutters, charming dormers, and a vintage entrance that captures the essence of old Boston rarely found in modern developments.