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For sale
  • $3,628,900

    21 Cottage Park Ave, Cambridge, MA 02140

    5beds
    4,087sqft
    : 
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    Single Family Residence
    Built in 2026
    4,520 Square Feet Lot
    $3,561,100 Zestimate®
    $888/sqft
    $-- HOA

    What's special

    Modern finishesWalk-in showerEave storageLaundry roomSecondary laundryOpen first floorMarble subway backsplash
    Striking new luxury single family on a quiet, tree-lined North Cambridge street, blending classic New England architecture with modern finishes and smart home readiness. Over 4,000 sf across four finished levels: 5 beds, 4.5 baths. The open first floor showcases a chef's kitchen with white oak and shaker cabinetry, marble subway backsplash, quartz counters, Thermador stainless appliances, statement hood, and oversized island over herringbone oak floors. Half bath and full pantry included. The second floor features a primary suite with spa bath, soaking tub and walk-in shower, plus a second en-suite bedroom and laundry room. Third floor offers two more bedrooms, full bath, and eave storage. Finished lower level features: entertainment room, private study, bedroom and secondary laundry. Private fenced yard plus detached 1-car garage. Walk to Davis, Porter, Alewife T, Minuteman Bikeway, top schools, parks, and Cambridge/Somerville dining. Under construction with completion in August.
    48 days
    |
    374
    |
    12
    |

    Zillow last checked:

    Listing updated:

    Listed by:

    John Raposo 617-839-3644,

    eXp Realty LLC 888-854-7493

    Source: MLS PIN,MLS#: 73528101

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      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 5
      • Bathrooms: 5
      • Full bathrooms: 4
      • 1/2 bathrooms: 1
      Primary bedroom
      • Level: Second
      Bedroom 2
      • Level: Second
      Bedroom 3
      • Level: Third
      Bedroom 4
      • Level: Third
      Bedroom 5
      • Level: Basement
      Primary bathroom
      • Features: Yes
      Bathroom 1
      • Level: First
      Bathroom 2
      • Level: Second
      Bathroom 3
      • Level: Second
      Dining room
      • Level: First
      Family room
      • Level: Basement
      Kitchen
      • Level: First
      Living room
      • Level: First
      Heating
      • Central, ENERGY STAR Qualified Equipment, Air Source Heat Pumps (ASHP)
      Cooling
      • Central Air, ENERGY STAR Qualified Equipment, Air Source Heat Pumps (ASHP)
      Appliances
      • Included: Electric Water Heater, Water Heater, Microwave, ENERGY STAR Qualified Refrigerator, ENERGY STAR Qualified Dryer, ENERGY STAR Qualified Dishwasher, ENERGY STAR Qualified Washer, Range Hood, Range
      • Laundry: Second Floor
      Features
      • Bathroom
      • Flooring: Wood, Tile
      • Doors: Insulated Doors
      • Windows: Insulated Windows
      • Basement: Full,Finished
      • Number of fireplaces: 1
      Interior area
      • Total structure area: 4,087
      • Total interior livable area: 4,087 sqft
      • Finished area above ground: 3,087
      • Finished area below ground: 1,000

      Property

      Parking
      • Total spaces: 4
      • Parking features: Detached, Paved Drive, Off Street
      • Garage spaces: 1
      • Uncovered spaces: 3
      Features
      • Patio & porch: Porch, Deck, Deck - Composite
      • Exterior features: Porch, Deck, Deck - Composite, Professional Landscaping, Sprinkler System, Fenced Yard, ET Irrigation Controller
      • Fencing: Fenced
      Lot
      • Size: 4,520 Square Feet
      Details
      • Parcel number: M:00189 L:00040,413233
      • Zoning: B

      Construction

      Type & style
      • Home type: SingleFamily
      • Architectural style: Colonial
      • Property subtype: Single Family Residence
      Materials
      • Frame
      • Foundation: Concrete Perimeter
      • Roof: Shingle,Metal
      Condition
      • Year built: 2026

      Utilities & green energy

      • Sewer: Public Sewer
      • Water: Public
      Green energy
      • Water conservation: ET Irrigation Controller

      Community & HOA

      HOA
      • Has HOA: No
      Location
      • Region: Cambridge

      Financial & listing details

      • Price per square foot: $888/sqft
      • Tax assessed value: $1,165,300
      • Annual tax amount: $7,400
      • Date on market: 6/2/2026

        Estimated market value

        $3,561,100

        $3.38M - $3.74M

        $6,630/mo

        Price history

        DateEventPrice
        6/2/2026Listed for sale$3,628,900+229.9%$888/sqft
        Source: MLS PIN #73528101 Report a problem
        12/29/2023Sold$1,100,000-15.1%$269/sqft
        Source: MLS PIN #73163697 Report a problem
        10/26/2023Contingent$1,295,000$317/sqft
        Source: MLS PIN #73163697 Report a problem
        9/26/2023Listed for sale$1,295,000-10.7%$317/sqft
        Source: MLS PIN #73163697 Report a problem
        9/14/2023Listing removed$1,450,000$355/sqft
        Source: MLS PIN #73086868 Report a problem
        5/17/2023Listing removed--
        Source: Zillow Rentals Report a problem
        5/13/2023Listed for rent$5,987$1/sqft
        Source: Zillow Rentals Report a problem
        5/12/2023Price change$1,450,000-9.4%$355/sqft
        Source: MLS PIN #73086868 Report a problem
        3/13/2023Listed for sale$1,600,000$391/sqft
        Source: MLS PIN #73086868 Report a problem
        3/13/2023Listing removed$1,600,000$391/sqft
        Source: MLS PIN #73056617 Report a problem
        11/9/2022Listed for sale$1,600,000+644.2%$391/sqft
        Source: MLS PIN #73056617 Report a problem
        5/19/1994Sold$215,000+230.8%$53/sqft
        Source: Public Record Report a problem
        12/10/1993Sold$65,000-56%$16/sqft
        Source: Public Record Report a problem
        6/15/1993Sold$147,866$36/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$7,400 -4.7%$1,165,300 -11.1%
        2024$7,761 +9.1%$1,311,000 +8%
        2023$7,113 +7.2%$1,213,800 +8.3%
        2022$6,633 +4.9%$1,120,500 +3.6%
        2021$6,326 +4.5%$1,081,300 +2.7%
        2020$6,056 +6.6%$1,053,300 +10.2%
        2019$5,680 +5.2%$956,200 +11.4%
        2018$5,399 +3.5%$858,400 +6.8%
        2017$5,216 +3.4%$803,700 +11.4%
        2016$5,043 +0.8%$721,500 +12.7%
        2015$5,005 -0.3%$640,000 +6.8%
        2014$5,020 0%$599,000 +3.3%
        2013$5,021 +2%$579,800 -0.1%
        2012$4,921 +4.4%$580,300 +0.5%
        2011$4,712 +7%$577,400 +1.2%
        2010$4,403 +2.1%$570,400
        2009$4,312 +1.3%$570,400 -1.4%
        2008$4,257 -0.8%$578,400 +0.8%
        2007$4,291 +3.7%$573,700 +2.4%
        2006$4,136 +4%$560,400 +9.6%
        2005$3,978 +11.5%$511,300 +9.3%
        2004$3,568 +20.9%$467,600 +15%
        2003$2,952 +5.6%$406,600 +5%
        2002$2,796 +19.9%$387,200 +60.1%
        2000$2,331 $241,800 +15%
        1999-- $210,300
        Find assessor info on the county website

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        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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        Climate risks

        Neighborhood: North Cambridge

        Getting around

        92 / 100
        Walker's Paradise
        72 / 100
        Excellent Transit
        93 / 100
        Biker's Paradise

        Nearby schools

        GreatSchools rating

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