Welcome to your urban sanctuary at 99 Sumner St #621, on the waterfront in Jeffries Point. This exquisite penthouse features 2 bedrooms + den, 2 baths, & 1,197 square feet of beautifully designed living space, complete with 2 garage parking spaces & 2 storage units. Step inside to find an open-concept layout that flows effortlessly, perfect for entertaining. The kitchen boasts Bosch appliances, quartz countertops, & upgraded cabinetry, all enhanced by hardwood flooring. Enjoy breathtaking views of the city & Boston Harbor from your private balcony. Living at The Mark means embracing luxury and convenience. This full-service building offers 24-hour concierge, private terrace, fireplace lounge, & billiards lounge, along with a fitness center & pet spa. Whether you want to relax with a book in the library or host a meeting in the conference room, everything you need is at your fingertips. Downtown Boston is minutes away via the Blue Line at Maverick Station, the ferry, or a quick drive!