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Est. Mortgage: $/month

Federal 30-year interest rate: 6.67% last updated on 2026-08-13

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20 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 0213820 Flagg Street Cambridge MA 02138
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  • 3Bedrooms
  • 3Bathrooms
  • 2,130Square Feet
Charming, colorful 1874 Victorian just a short walk to Harvard Sq. Preserved details include original wd fls, period mouldings, +hi ceilings blended w/contemporary features such as AC+ EV charging capability. LR has bay windows, crown moulding, built-ins. DR has wall of sliding glass doors to patio+fenced yard. EIK has black soapstone+white marble counters; built-in Canadian birch plywood banquette+cabinetry; tile backsplash; ss induction range, refrigerator, vent hood, + dw. Second fl has lg front bdrm, once occupied by W.E.B. DuBois while at Harvard; full tiled bath off hall; primary bdrm w/custom closets; hall linen+storage closets; laundry; + sunken office w/yd view. Top fl has small bdrm, flex room, + full bath w/spa tub+skylight. Pollinator garden + meandering grape arbor make the yard feel private + bucolic. Unfinished basement has systems + storage/workshop space. Just 1 block from the Charles River + 2 blocks from Harvard Sq., this is an ideal location with great walkability.
Listed by Thalia C. Tringo of Thalia Tringo & Associates Real Estate,Inc.

Listing Sold by Gibson Sotheby's International Realty

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More Info

Basic Information

  • Bedrooms3
  • Mls StatusSold
  • Bathroom3
  • BuyerOfficeNameGibson Sotheby's International Realty
  • Contingency Pending P&S
  • Lot Features Other
  • Parcel Number M:00130 L:00087,408347

Location

  • NeighborhoodRiverside
  • SubdivisionRiverside
  • Address20 Flagg Street
  • Building Number20
  • CountyMiddlesex
  • StateMA
  • StreetFlagg Street
  • TownCambridge
  • Zip02138

Interior

  • Flooring Wood, Tile
  • Interior Features Home Office

Utilities

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

Tax Information

  • Tax Assessed Value $2,710,500
  • Tax Year 2025
  • Taxes$17,212

Rooms

  • Bathroom 1 First
  • Bathroom 2 Second
  • Bathroom 3 Third
  • Bathrooms Total Decimal 2.5
  • Bedroom 2 Second
  • Bedroom 3 Third
  • Dining Room First
  • Full Bath2
  • Half Baths1
  • Kitchen First
  • Living Room First
  • Master Bedroom Second
  • Office Second

Property

  • Acreage0.08

Exterior

  • Exterior Features Porch, Deck, Patio, Fenced Yard, Garden
  • Fencing Fenced
  • RoofShingle

Property Information

  • Square Feet2,130
  • Building Area Source Public Records
  • Living Area 2,130
  • Lot Size Square Feet 3,600
  • Lot Size Units Acres

Other

  • Date Listed10/01/2025
  • Farm Land Area Units Square Feet

Parking

  • Parking Spaces1
  • Open Parking YN Yes
  • Parking Features Off Street, Driveway

Basic Information

  • GO-List Price$2,495,000
  • MLS Number73438031
  • Modification Date11/19/2025
  • Property SubTypeSingle Family Residence
  • PurchaseContractDate10/09/2025
  • Sale Date11/19/2025
  • Sale Price$2,505,000
  • Virtual TourView Tour

Building

  • BasementFull, Interior Entry, Bulkhead, Unfinished
  • Building Area Units Square Feet
  • FireplaceYes
  • Fireplaces Total 1
  • FoundationStone, Brick/Mortar
  • GO-Property StyleVictorian
  • Patio And Porch Features Porch, Deck, Patio
  • Rooms9
  • Year Built1874
  • Year Built Details Approximate
  • Year Built Source Public Records

Amenities

  • Amenities
    • Bike Path
    • Highway Access
    • Park
    • Public Transportation
    • Shopping
    • T-Station
    • University
    • Walk/Jog Trails
  • Appliances IncludedRange, Dishwasher, Refrigerator, Washer, Dryer, Range Hood

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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