Welcome to 300 Commercial Street | Boston, Ma 02109 | Waterfront

Year Built

1900; converted 1995


105 residences, 1–2+ bedrooms, 553–2,386 sf.


Central air, elevator (common/direct access), garage parking, pet-friendly (with restrictions), private balconies/terraces/decks, security,


The Mariner, formerly a warehouse, was converted to a luxury 10-story, mid-rise brick and stone condominium in 1984. Since that time, The Mariner has undergone extensive renovations and remodeling, and showcases Bostonian maritime history. Most units in The Mariner offer exceptional, unobstructed views of Boston’s harbor and skyline from large private patios. Some units offer 650+ square-foot wrap-around decks, perfect for entertaining. Amenities include a concierge, garage parking and a common roof deck with spectacular 360 degree views. Situated steps from the historic and lively North End and its many restaurants, bakeries, cafes and boutiques, and within walking distance to Waterfront attractions, Faneuil Hall, the Rose Kennedy Greenway, the Financial District, downtown Boston and public transportation, The Mariner offers a convenient luxurious lifestyle with exceptional waterfront ambiance.


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Whether you’re an empty nester or a young professional, looking for a full-service luxury high-rise or a charming brownstone, Frann will be your partner in making the best-informed real estate decision.