The Lydon
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This one-of-one Back Bay penthouse presents a rare combination of scale, privacy, and design. Spanning the top two floors of a corner, boutique building, 6,132 SF is framed by 38 windows on three exposures with sweeping Charles River, skyline, and sunset views.Designed by Eric Roseff, the residence offers direct elevator access from three garage spaces, a grand duplex layout, and private internal stair. A suburban-scale kitchen anchors expansive living spaces seldom found in the city.The rooftop retreat-featuring pool, spa, fire pit, outdoor kitchen, and landscaped green roof-offers exceptional privacy with no adjacent terraces. A primary suite with fireplace, dedicated office suite, and flexible layout complete this exceptional, trophy-caliber offering.
More Info
Basic Information
- Bedrooms5
- Mls StatusActive
- Bathroom6
- Parcel Number 5175351
- Unit NumberPH
Tax Information
- Tax Assessed Value $14,887,300
- Tax Year 2025
- Taxes$172,397
Parking
- Parking Spaces3
- Covered Spaces 3
- Garage YN Yes
- Parking Features Under, Garage Door Opener, Exclusive Parking
Rooms
- Bathroom 1 16 x 13
- Bathroom 2 12 x 7
- Bathroom 3 5 x 6
- Bathrooms Total Decimal 5
- Bedroom 2 12 x 16
- Bedroom 3 13 x 14
- Bedroom 4 15 x 15
- Dining Room 17 x 15
- Family Room 21 x 13
- Full Bath4
- Half Baths2
- Kitchen 21 x 15
- Living Room 22 x 24
- Master Bedroom 20
- Office 15 x 15
Basic Information
- List Price$18,500,000
- MLS Number73516362
- Modification Date05/15/2026
- Property SubTypeCondominium
- Virtual TourView Tour
Location
- NeighborhoodBack Bay
- SubdivisionBack Bay
- Address401 Beacon Street
- Building Number401
- CountySuffolk
- StateMA
- StreetBeacon Street
- TownBoston
- Zip02115
Building
- Attached Garage YN Yes
- BasementN
- Building Area Units Square Feet
- Common Walls No One Above
- Construction Materials Brick, Stone
- Entry Level 5
- FireplaceYes
- Fireplace Features Dining Room, Family Room, Kitchen, Master Bedroom
- Fireplaces Total 3
- Garage Spaces3
- Patio And Porch Features Deck - Roof
- Property NameThe Lydon
- Rooms12
- Stories3
- Utilities For Gas Range, For Electric Dryer, Washer Hookup
- Year Built1890
- Year Built Details Actual, Renovated Since
- Year Built Source Public Records
Interior
- Flooring Tile, Hardwood, Flooring - Hardwood, Flooring - Stone/Ceramic Tile
- Interior Features
- Bathroom
- Bathroom - Double Vanity/Sink
- Bathroom - Full
- Bathroom - With Tub & Shower
- Closet/Cabinets - Custom Built
- Elevator
- Exercise Room
- Game Room
- Mud Room
- Office
- Recessed Lighting
- Sitting Room
- Wet Bar
- Wet bar
Exterior
- Exterior Features Deck - Roof, Hot Tub/Spa, Decorative Lighting, City View(s)
- RoofRubber
Utilities
- Cooling Central Air
- Cooling YN Yes
- Electric Circuit Breakers
- Heat SystemYes
- Heating Central, Forced Air, Natural Gas
- Sewer Public Sewer
- Water Source Public
Property Information
- Square Feet6,132
- Building Area Source Measured
- Living Area 6,132
- Lot Size Units Acres
- Property Attached YN Yes
- Spa YN Yes
- Structure Type Mid-Rise
- View YN Yes
Amenities
- Amenities
- Bike Path
- Conservation Area
- Highway Access
- House of Worship
- Medical Facility
- Park
- Pool
- Public School
- Public Transportation
- Shopping
- T-Station
- University
- Walk/Jog Trails
- Appliances IncludedOven, Dishwasher, Microwave, Range, Refrigerator, Washer, Dryer, Wine Refrigerator, Range Hood
- Association Amenities Elevator(s)
- Other AmenitiesFireplace
- PetsYes w/ Restrictions
- Security Features Intercom
Legal
- ZoningRes
Other
- Association Fee $4,525
- Association Fee Frequency Monthly
- Association Fee Includes
- Insurance
- Maintenance Grounds
- Maintenance Structure
- Sewer
- Snow Removal
- Trash
- Water
- Date Listed05/11/2026
- Farm Land Area Units Square Feet
- Spa Features Hot Tub/Spa
- View Count6
Map Location
Listed by Collin Sullivan of William Raveis R.E. & Home Services
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