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Hidden in plain sight. Designed to blend discreetly into its traditional Cambridge neighborhood, 11 Brown Street offers no hint of the extraordinary world within. Its discretion bespeaks a quiet confidence: luxury measured not by outward display, but by the quality of life experienced inside. Conceived in collaboration with Mariana IbaƱez, Chair of UCLA’s Department of Architecture and Urban Design, the home unfolds through luminous spaces, sculptural forms, and intimate connections to nature. Generous proportions retain a human scale, while rich natural materials, exquisite craftsmanship, and carefully orchestrated light create an atmosphere both exhilarating and tranquil. As daylight moves through the home, shifting perspectives reveal new moments of wonder. A serene library and upper-level family room offer inviting retreats, while two distinctive fire features bring warmth and drama. Thoughtfully arranged spaces for cooking, dining, and entertaining celebrate the intimate pleasures of gatherings large and small. Sumptuous baths and a private spa with sauna and steam offer restoration, while sophisticated technology works intuitively in the background to enrich daily life. A main-level suite with private entrance provides flexibility for guests or multigenerational living. The garden level offers media and fitness spaces, a second kitchen, and an au pair suite. Indoors and out flow seamlessly into expansive, tree-framed grounds, with unusually long, private views just blocks from Harvard Square. This private oasis reveals its enchantments only to those invited within. A truly extraordinary setting in which to practice the art of living deeply.

More Info

Basic Information

  • Bedrooms6
  • Mls StatusActive
  • Bathroom7
  • Lot Features Cul-De-Sac, Level
  • Parcel Number M:00220 L:00163,415943
  • Road Frontage DescriptionPaved

Tax Information

  • Tax Assessed Value $11,881,900
  • Tax Year 2026
  • Taxes$79,252

Parking

  • Parking Spaces6
  • Covered Spaces 2
  • Garage YN Yes
  • Open Parking YN Yes
  • Parking Features Detached, Paved Drive, Off Street, Paved

Rooms

  • Bathrooms Total Decimal 6.5
  • Bedroom 2 Second
  • Bedroom 3 Second
  • Bedroom 4 Second
  • Bedroom 5 First
  • Dining Room First
  • Family Room First
  • Full Bath6
  • Half Baths1
  • Kitchen First
  • Living Room First
  • Master Bedroom Second

Basic Information

  • List Price$12,800,000
  • MLS Number73516411
  • Modification Date11/08/2026
  • Property SubTypeSingle Family Residence
  • Virtual TourView Tour

Location

  • NeighborhoodHarvard Square
  • SubdivisionHarvard Square
  • Address11 Brown Street
  • Building Number11
  • CountyMiddlesex
  • StateMA
  • StreetBrown Street
  • TownCambridge
  • Zip02138

Building

  • BasementFull, Finished, Walk-Out Access, Interior Entry
  • Building Area Units Square Feet
  • FireplaceYes
  • Fireplaces Total 2
  • FoundationConcrete Perimeter
  • Garage Spaces2
  • Patio And Porch Features Deck, Patio
  • Property StyleColonial, Contemporary
  • Rooms10
  • Year Built2024
  • Year Built Details Approximate
  • Year Built Source Owner

Property

  • Acreage0.34

Interior

  • Interior Features
    • Exercise Room
    • Game Room
    • Media Room
    • Sauna/Steam/Hot Tub
    • Wet Bar
    • Wired for Sound

Exterior

  • Exterior Features
    • Deck
    • Fenced Yard
    • Garden
    • Patio
    • Professional Landscaping
    • Sprinkler System
  • Fencing Fenced/Enclosed, Fenced
  • RoofSlate, Rubber

Utilities

  • Cooling Heat Pump
  • Cooling YN Yes
  • Heat SystemYes
  • Heating Forced Air, Heat Pump, Natural Gas, Hydro Air
  • Sewer Public Sewer
  • Water Source Public

Property Information

  • Square Feet7,258
  • Building Area Source Measured
  • Living Area 7,258
  • Lot Size Square Feet 14,657
  • Lot Size Units Acres

Amenities

  • Amenities
    • Bike Path
    • Conservation Area
    • Highway Access
    • House of Worship
    • Marina
    • Medical Facility
    • Park
    • Private School
    • Public School
    • Public Transportation
    • Shopping
    • T-Station
    • Tennis Court(s)
    • University
    • Walk/Jog Trails

Other

  • Date Listed05/11/2026
  • Farm Land Area Units Square Feet
  • View Count59

Map Location

Driving Directions

Listed by Beth Dickerson of Gibson Sotheby's International Realty

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