This beautifully renovated 2 bed/2 bath penthouse at 21 Prospect St #3 offers two private outdoor spaces, including an expansive roof deck with sweeping city, Monument & harbor views, plus an additional deck off the kitchen. The sun-filled open living area features a fireplace, while the chef''s kitchen boasts custom cabinetry, marble countertops & wine fridge. A spacious primary suite includes a spa-like bath, and the 2nd bedroom offers access to a versatile loft with window seat-ideal as an office or reading nook. Custom built-in closets maximize storage, with additional private storage in the basement. High-end finishes throughout include hardwood floors, central air & in-unit laundry. Enjoy modern comforts paired with historic Charlestown charm, just steps from the Monument, shops, dining, transit & waterfront.