191 Commonwealth Ave

Originally constructed as the Hotel Agassiz at the end of the 19th century, this single‑story listing set exists within a landmarked Back Bay building presented today as a low‑unit condominium block. The property retains abundant period detail: high ceilings, ornate moldings, bay windows, multiple marble fireplaces and hardwood floors throughout. Units range from two‑ to multi‑bedroom plans expanded by studies, libraries or parlors and are often organized as expansive floor‑through residences or duplexes with grand entertaining rooms, formal dining spaces and separate family areas. Kitchens have been updated with stone counters, custom cabinetry and high‑end appliances while baths show restored and renovated marble finishes. Common areas include an elegant foyer, elevator access, concierge/doorperson and live‑in superintendent support; professional management oversees building operations. Amenities reported across the building emphasize storage, on‑site laundry, exercise/gym facilities, dedicated office/library space and occasional garage parking options through nearby rentals. Pet policies are permissive in many listings. The building’s address fronts Commonwealth Avenue, offering direct access to the Mall, Charles River Esplanade, Newbury Street retail and transit connections, situating residents in a highly walkable, culturally established Back Bay neighborhood.