643 Main Street Harwich, MA $ 1,399,000
643 Main Street
$ 1,399,000
Recently Listed
Open House 7/31 4pm - 5:30pm
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643 Main Street

Harwich, MA, 02645
$ 1,399,000
Bedrooms6 Baths3.0 Sq 2,872

Monthly Estimate*

$ 8,833

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Single Family Home for sale in Harwich, MA

for $1,399,000 with 6 bedrooms and 3 full baths. This 2,872 square foot home was built in 1919 on a lot size of 1.43.

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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Open House

7/31/2026 4:00 PM - 5:30 PM
8/1/2026 11:00 AM - 12:30 PM
8/2/2026 11:00 AM - 12:30 PM
643 Main Street Harwich, MA
* Some states or local ordinances may prohibit Open Houses at this time, please confirm with your Weichert agent or local rep to confirm

Single Family Active

Price

$ 1,399,000

Bedrooms

6

Full Bath

3

Property Type

Single Family

Taxes

$ 5,664

Style

Cape Cod

Lot Size

1.43

Year Built

1919

Town/City

Harwich

County/Region

Barnstable

MLS | Web ID

22603623

Features
General
Sewer Septic Tank
Heating Hot Water
Roof Asphalt
Appliances Dishwasher Washer Refrigerator Electric Range Microwave Electric Dryer Electric Water Heater
Zoning R
Garage Spaces 2
Patio/Porch Features Patio Porch
Architectural Style Cape Cod
Construction Materials Shingle Siding
Year Built 1919
Stories Count 2
Township Harwich
Property Subtype Single Family Residence
Tax Year 2026
County Barnstable
New Construction false
Property Type Residential
HOA false
Attached Garage false
Garage Y/N true
Total Rooms 11
Full Baths 3
Status Active
Directions Main St. between South and Sisson
City Harwich
High School District Monomoy
Lot Size Units Acres
Lot Size Square Feet 62291
Carport Y/N false
Property Attached Y/N false
Land Lease Y/N false
Tax Annual Amount 5664
Showing Instructions Call Listing Agent. First showings @ open house Fri 7/31 from 4-5:30 Sat/Sun 11-12:30
Home Warranty Y/N false
Property Condition Approximate
Building Area Units Square Feet
Primary Bedroom Level First
Living Area Units Square Feet
Standard Status Active
Middle/Junior School District Monomoy
Elementary School District Monomoy
Tax Assessed Value 974800
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Interior
Interior Amenities HU Cable TV Recessed Lighting
Basement Bulkhead Access Interior Entry Full
Flooring Wood Carpet Tile
Total Fireplaces 1
Kitchen Level First
Air Conditioning Y/N true
Heating Y/N true
Fireplace Y/N true
Half Baths 0
Laundry Features Laundry Room First Floor
Total Bedrooms 6
Living Room Level First
Below Grade Finished Area Unit Type Square Feet
Kitchen Features Kitchen Upgraded Cabinets Kitchen Island Recessed Lighting
Total Baths 3
Living Room Features Living Room
Bedroom 4 Features Bedroom 4 Closet
Bedroom 3 Features Bedroom 3 Closet
Bedroom 2 Features Bedroom 2 Closet
Dining Room Features Dining Room
Kitchen Area 193.049999999
Kitchen Description Flooring: Wood
Kitchen Length 16.5
Kitchen Width 11.7
Primary on Main 156.799999999
Second Bedroom Length 14
Second Bedroom Width 11.2
Bedroom 3 Area 114.433
Bedroom 3 Length 10.3
Bedroom 3 Width 11.11
Bedroom 4 Area 78.96
Bedroom 4 Length 9.4
Bedroom 4 Width 8.4
Dining Room Area 10.8 126.36
Dining Room Width 11.7
Living Room Area 215.76
Living Room Length 18.6
Living Room Width 11.6
Primary Bedroom Area 200.07
Primary Bedroom Features Closet
Primary Bedroom Length 11.7
Primary Bedroom Width 17.1
Dining Room Level First
Bedroom 4 Level Second
Bedroom 3 Level Second
Second Bedroom Level Second
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Exterior
Exterior Amenities Garden
Lot Features Bike Path School Major Highway House of Worship Cape Cod Rail Trail Shopping In Town Location Conservation Area Cleared Level
Total Parking 8
Lot Size Area 1.43
Foundation Details Block
Building Area Total 2872
Lot Size Acres 1.43
Road Surface Type Paved
Lot Size Source Field Card
Waterfront Y/N false
Foundation Area 1392
Road Frontage Type Public
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* Excluded Features
List By
Richard J Waystack

Listing Agent

Keller Williams Realty

Broker

rwaystack@waystack.com

Email

Affordability Calculator

$9,305
Per Month
95%
5%
0%
Monthly Principal & Interest
$8,833
Monthly Property Taxes
$472
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
4750209 Elementary School
4734083 Middle School
Unknown High School High School
Pricing History
DatePricePrice ChangeDescription
7/27/2026$1,399,000 Listed Price

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643 Main Street, Harwich, MA, 02645 is a Single Family Home for sale at $1,399,000 with 2,872 sqft and a lot size of 1.43. 643 Main Street has 6 bedrooms, 3.0 baths, and was built in 1919. The property's zip code is 02645 which is in Harwich, MA