405 Commonwealth Ave

A restored 1890 brick mansion on Commonwealth Avenue in Back Bay converted into a small condominium building. The property is one story or arranged on walk-up floors within a multi-level mansion footprint and contains primarily one-bedroom residences with period architectural details preserved. Interiors show high ceilings (often 11–12 feet), crown moldings, decorative fireplaces with mantels, bow windows and hardwood floors; many units have renovated kitchens and baths while retaining original trim, arched doorways, and plaster ceiling details. Common elements include broadband internet availability, a shared laundry room, and a professionally managed association that keeps monthly fees modest. Exterior features emphasize private outdoor access uncommon in the neighborhood: several units offer fenced brick-paved patios or garden-front exposures facing the Commonwealth Avenue Mall, and some homes have dual entrances onto Commonwealth Avenue and side streets. Parking is not integral but rental options exist nearby. Pet policies vary by unit and are generally permissive in listings. The building’s location places residents steps from Newbury Street, the Charles River Esplanade, multiple Green Line stations, restaurants and cultural venues, delivering a classic Back Bay urban lifestyle with restored historic character and modernized systems.