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643 Main Street
Harwich MA 02645 US

$1,399,000

Active Listing ID 22603623
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6 bed
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3.00 Bath (3 Full)
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Lot: 1.43 Acres
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Single Family Residence

$1,399,000

Active Listing ID 22603623
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643 Main Street A rare opportunity in Harwich Center! Set on approximately 1.5 acres, this one-of-a-kind property offers endless possibilities with a main home, a separate ADU with its own private driveway, and a detached mixed-use garage. With a total of 6 bedrooms, it's ideal for multigenerational living, extended family, or guests, while the ADU also provides excellent rental history. The detached garage offers incredible flexibility for a business, workshop, storage, hobby space, or additional rental opportunity, with plenty of room for vehicles, bikes, and tools. Outside, enjoy a beautifully landscaped backyard with multiple sheds ready to become a man cave, she shed, home bar, art studio, or your own private retreat around the fire pit. Properties offering this much space, versatility, and potential rarely come to market in Harwich Center. Don't miss your chance to make this truly unique property yours!

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Property Features

  • Facts
  • Lot Size: 1.43 Acres
  • Property Type: Residential
  • Property Sub-type: Single Family Residence
  • Features
  • Full Bathrooms: 3
  • Cooling System: Wall Unit(s)
  • Exterior Finish: Private Yard, Garden
  • Floor Covering: Tile, Carpet, Wood
  • Roof Type: Asphalt
  • Heating Fuels: Oil
  • Additional Features
  • Basement
  • Fireplace
  • Patio

Property

  • propertytype: Residential
  • propertysubtype: Single Family Residence
  • listprice: 1399000
  • unparsedaddress: 643 Main Street
  • postalcity: Harwich
  • stateorprovince: MA
  • country: US
  • postalcode: 02645
  • bathroomsfull: 3
  • bathroomshalf: 0
  • bathroomsonequarter: 0
  • bathroomsthreequarter: 0
  • lotsizeacres: 1.43
  • lotsizeunits: Acres
  • lotsizearea: 1.43
  • livingarea: 2872
  • livingareaunits: Square Feet
  • latitude: 41.685932
  • longitude: -70.081533
  • listagentfullname: Richard J Waystack
  • listagentemail: rwaystack@waystack.com
  • listagentkey: 3yd-CCIAORMA-U1RS
  • listagentmlsid: U1RS
  • listagentpreferredphone: 5087760964
  • listagentofficephone: 5087760964
  • listofficekey: 3yd-CCIAORMA-KELW
  • listofficemlsid: KELW
  • disclaimer: Copyright © 2026 Cape Cod & Islands Association of REALTORS®, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
  • sourcesystemid: CCIAORMA
  • yearbuilt: 1919
  • listingcontractdate: 2026-07-27
  • listagenturl: http://CapeCodKellerWilliams.com
  • countyorparish: Barnstable
  • parcelnumber: HARW M:40 B: L:E4-0
  • elementaryschooldistrict: Monomoy
  • middleorjuniorschooldistrict: Monomoy
  • highschooldistrict: Monomoy
  • appliances: Water Heater, Electric Range, Dishwasher, Microwave, Refrigerator, Washer
  • cooling: Wall Unit(s)
  • constructionmaterials: Shingle Siding
  • flooring: Tile, Carpet, Wood
  • heating: Oil
  • fireplaceyn: True
  • transactiontype: ForSale
  • storiestotal: 2
  • parkingtotal: 8
  • parkingfeatures: Open, Garage, Driveway
  • roof: Asphalt
  • waterfrontyn: False
  • franchiseaffiliation: Keller Williams Realty
  • interiorfeatures: HU Cable TV, Recessed Lighting, Kitchen Island
  • exteriorfeatures: Private Yard, Garden
  • rooms: Dining Room, Bedroom 3, Bedroom 4, Basement, Bedroom 5, Laundry Room, Bathroom 1, Bathroom 3, Bedroom 6, Bathroom 2, Bedroom 2, Bedroom 1
  • patioandporchfeatures: Porch, Patio
  • basement: Full
  • dock: False
  • poolprivateyn: False
  • spayn: False
  • internetaddressdisplayyn: True
  • internetautomatedvaluationdisplayyn: True
  • internetconsumercommentyn: True
  • location: -70.081535, 41.685932
  • openhouse: { "AppointmentRequiredYN": false, "ListingKey": "3yd-CCIAORMA-22603623", "OpenHouseEndTime": "2026-08-02 12:30:00", "OpenHouseId": "6876687", "OpenHouseRemarks": null, "OpenHouseStartTime": "2026-08-02 11:00:00", "OpenHouseType": null, "VirtualOpenHouseURL": null }
  • customfields: {"AdditionalInformation":{}, "AlternatePrices":[], "BrokerName":"MA Realty Partners LLC, DBA Keller Williams Realty, Mid Upper Cape Cod", "BuilderEmail":null, "BuilderFax":null, "BuilderPhone":null, "City":null, "Country":null, "CustomSourceId":null, "Expenses":[], "GeocodeOptions":null, "LeadRoutingEmail":"rwaystack@waystack.com", "ListBrokerageCity":"Centerville", "ListBrokerageCountry":"US", "ListBrokerageEmail":"KLRW826@KW.COM", "ListBrokerageLogoUrl":"http://brokerlogos.listhub.net/CCIAORMA/c5ababc32073c6c401207cb3d5fd0123/20090406160101092.gif", "ListBrokerageName":"MA Realty Partners LLC, DBA Keller Williams Realty, Mid Upper Cape Cod", "ListBrokeragePhone":"508-534-7200", "ListBrokeragePostalCode":"02632", "ListBrokerageStateOrProvince":"MA", "ListBrokerageUnitNumber":"Suite # 2", "ListBrokerageUnparsedAddress":"1600 Falmouth Road", "ListBrokerageWebsiteUrl":"http://CapeCodKellerWilliams.com", "ListOfficeAddress1":"1600 Falmouth Rd., Suite 2 ", "ListOfficeAddress2":"Suite # 2", "ListOfficeBrokerMlsId":"KELW", "ListOfficeCity":"Centerville", "ListOfficeCountry":"US", "ListOfficeEmail":"klrw826@kw.com", "ListOfficePostalCode":"02632", "ListOfficeStateOrProvince":"MA", "ListPriceCurrencyType":"USD", "ListingTitle":"SINGLE_FAMILY - Harwich, MA", "ListingURL":"https://www.realtor.com/realestateandhomes-detail/643-Main-St_Harwich_MA_02645_M40909-53564?f=listhub&s=CCIAORMA&m=22603623&c=rexren", "MLSModificationTimestamp":"2026-08-01 06:34:45", "Neighborhoods":[{"Description":null, "Name":"Harwich"}], "PostalCode":null, "RoomCount":11, "StateOrProvince":null, "Taxes":[{"TaxAnnualAmount":5664, "TaxDescription":null, "TaxYear":"2026"}], "UnitNumber":null, "UnparsedAddress":null}
Listing Changed: 1/1/2020 12:00:00 AM GMT
Source Updated Date: 8/5/2026 12:36:28 PM GMT

Courtesy of: Richard J Waystack, Keller Williams Realty, rwaystack@waystack.com

Copyright © 2026 Cape Cod & Islands Association of REALTORS®, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.