Penthouse #1 at 121 Washington is a stunning 1,403 square foot residence featuring a spacious, private roof deck perfect for relaxing or entertaining. This luxury unit is located DIRECTLY ACROSS FROM THE T STATION and in a boutique six-unit building that blends modern design with industrial sophistication in a prime location between Union Square and East Somerville. Inside, you'll find soaring ceilings, oversized windows, custom cabinetry, quartz countertops, stainless steel appliances, and designer lighting. The thoughtfully designed layout includes generous bedrooms with walk-in closets and elegant bathrooms with soaking tubs and frameless glass showers. The building is expected to receive its Certificate of Occupancy by mid-August, offering an exciting opportunity to move into a brand-new home just steps from Union Square’s dining, shopping, and public transit.