Generational opportunity on the first block of Commonwealth Avenue in the Back Bay. Built in 1864 as a grand residence, this 8,000+/- sq/ft brownstone presents a rare opportunity to create a custom home in one of the most sought-after locations in Boston. Available for the first time in 50 years, this six-story property with elevator overlooks the Commonwealth Avenue Mall and is steps to Public Garden & Newbury Street. 18 Commonwealth is a design / build opportunity for 5+ bedrooms / 6+ bathroom single family home with potential to add a roof terrace & garage parking. Original details include grand staircase illuminated by sky-light, intricate mill work & moldings, 10-12 foot ceilings, ornate fireplaces & hardwood floors. 4 outdoor parking spaces. Endless possibilities for renovation & restoration of this historic residence on the first block on Commonwealth Avenue.