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Exquisite, wide Back Bay townhouse on the sunny side of Commonwealth with large private roof deck, magnificent views, Juliet balcony, and 6 outdoor parking showcases exceptional bones and timeless character. Expansive windows provide outstanding natural light, highlighting the home's historic charm and original detail. The property offers a versatile floor plan for customization, with approximately 10,000+/-sf to create luxurious spaces and exceptional entertaining space. Currently exhibiting an open and airy kitchen, soaring ceilings, a stately dining room, beautiful paneled library, 5+ well-proportional bedrooms, abundant closets, and a separate au pair suite, it is one of only a few single family homes in this highly coveted neighborhood. Its distinguished faade, irreplaceable location, and palatial scale present an extraordinary canvas for a discerning buyer. Elevator to all floors, 8 fireplaces, and grandeur complete this home’s spectacular offering. Some photos virtually staged.

More Info

Basic Information

  • Bedrooms6
  • Mls StatusNew
  • Bathroom8
  • Lot Features Other
  • Parcel Number 3351981

Tax Information

  • Tax Assessed Value $11,276,000
  • Tax Year 2026
  • Taxes$141,208

Parking

  • Parking Spaces6
  • Parking Features Off Street, Deeded

Rooms

  • Bathrooms Total Decimal 6.5
  • Full Bath5
  • Half Baths3

Basic Information

  • List Price$21,950,000
  • MLS Number73527728
  • Modification Date06/01/2026
  • Property SubTypeSingle Family Residence

Location

  • NeighborhoodBack Bay
  • SubdivisionBack Bay
  • Address129 Commonwealth Avenue
  • Building Number129
  • CountySuffolk
  • StateMA
  • StreetCommonwealth Avenue
  • TownBoston
  • Zip02116

Building

  • Building Area Units Square Feet
  • Construction Materials Brick
  • FireplaceYes
  • Fireplaces Total 8
  • FoundationOther
  • Levels Multi/Split
  • Patio And Porch Features Deck - Roof
  • Rooms11
  • Year Built1899
  • Year Built Details Approximate
  • Year Built Source Public Records

Property

  • Acreage0.07

Interior

  • Flooring Wood, Marble

Exterior

  • Exterior Features Deck - Roof, Balcony
  • RoofRubber

Utilities

  • Cooling Central Air
  • Cooling YN Yes
  • Heat SystemYes
  • Heating Central
  • Sewer Public Sewer
  • Water Source Public

Property Information

  • Square Feet9,624
  • Building Area Source Public Records
  • Living Area 9,624
  • Lot Size Square Feet 3,237
  • Lot Size Units Acres
  • Property Attached YN Yes

Legal

  • ZoningRes

Other

  • Date Listed06/01/2026
  • Farm Land Area Units Square Feet
  • View Count1

Map Location

Driving Directions

Listed by Jeannemarie Conley of Compass

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