The Lydon

401 Beacon Street, Unit PH, Back BayBoston, MA 02115MLS Number 73516362

  • Price: $18,500,000
  • Est. Mortgage of $/month
  • 4 Days on Market
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Federal 30-year interest rate: 6.37% last updated on May 7, 2026
* All Figures are estimates. Check with your bank or proposed mortgage company for actual interest rates.
This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.
  • 5Bedrooms
  • 6Bathrooms
  • 1890Year Built
  • 6,132Square Feet
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401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115401 Beacon Street Boston MA 02115
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Cape Coastal Sotheby's International Realty

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Cape Coastal Sotheby's International Realty
Office: 508-477-6688
540 Falmouth Road (Mashpee Rotary)
Mashpee, MA 02649
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.

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Basic Information

  • Bedrooms5
  • Mls StatusActive
  • Bathroom6
  • Parcel Number 5175351
  • Unit NumberPH

Location

  • NeighborhoodBack Bay
  • SubdivisionBack Bay
  • Address401 Beacon Street
  • Building Number401
  • CountySuffolk
  • StateMA
  • StreetBeacon Street
  • TownBoston
  • Zip02115

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

Utilities

  • Cooling Central Air
  • Cooling YN Yes
  • Electric Circuit Breakers
  • Heat SystemYes
  • Heating Central, Forced Air, Natural Gas
  • Sewer Public Sewer
  • Water Source Public

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

Tax Information

  • Tax Assessed Value $14,887,300
  • Tax Year 2025
  • Taxes$172,397

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

Exterior

  • Exterior Features Deck - Roof, Hot Tub/Spa, Decorative Lighting, City View(s)
  • RoofRubber

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

Legal

  • ZoningRes

Parking

  • Parking Spaces3
  • Covered Spaces 3
  • Garage YN Yes
  • Parking Features Under, Garage Door Opener, Exclusive Parking

Basic Information

  • List Price$18,500,000
  • MLSPIN 73516362
  • Modification Date05/15/2026
  • Property SubTypeCondominium
  • Virtual TourView Tour

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

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 Count1

Driving Directions

Listed by Collin Sullivan of William Raveis R.E. & Home Services

Back Bay Boston, MA Demographics

There is no data available

Back Bay Boston, MA Real Estate Market Data

There is no data available

Back Bay Boston, MA Schools

School NameDistanceTypeGrades

The property listing data and information, or the Images, set forth herein were provided to MLS Property Information Network, Inc. (MLSPIN) from third party sources, including sellers, lessors and public records, and were compiled by MLSPIN. The property listing data and information, and the Images, are for the personal, non-commercial use of consumers having a good faith interest in purchasing or leasing listed properties of the type displayed to them and may not be used for any purpose other than to identify prospective properties which such consumers may have a good faith interest in purchasing or leasing. MLSPIN and its subscribers disclaim any and all representations and warranties as to the accuracy of the property listing data and information, or as to the accuracy of any of the Images, set forth herein.

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