643 Main St Harwich, MA ^$ 1,399,000

643 Main St

^$ 1,399,000

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Open House 7/31 4pm - 5:30pm

643 Main St

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!

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 St 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

Full Bath

Property Type

Single Family

Taxes

^$ 5,664

Style

Cape

Lot Size

1.43

Year Built

1919

Town/City

Harwich

County/Region

Barnstable

MLS | Web ID

73555500

List By

Richard J. Waystack

Listing Agent

Keller Williams Realty

Broker

Affordability Calculator

$9,305

Per Month

Monthly Principal & Interest: $8,833
Monthly Property Taxes: $472
Monthly Home Insurance: --

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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

Trends

Single family listings in Harwich, MA

Average List Price ^$1,583,546

Percent of Sale Price 13%

About Harwich, MA

12,828 Population

4% Since 2002

^$70,893 Median Income

54.33 Median Age

17% Households with Children

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Trends Information provided by ATTOM Data Solutions.

Neighborhood & Schools

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Pricing History

Date	Price	Price Change	Description
7/28/2026	$1,399,000		Listed Price

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643 Main St, 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 St has 6 bedrooms, 3.0 baths, and was built in 1919. The property's zip code is 02645 which is in Harwich, MA

*Information deemed reliable but not guaranteed.

Financial calculator disclaimer: 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.

Data is updated as of 7/28/2026.

The real estate information and related content displayed on this site is provided for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

The property listing data and information, or the Images, set forth herein were provided to MLS Property Information Network, Inc. from third party sources, including sellers, lessors and public records, and were compiled by MLS Property Information Network, Inc. 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. MLS Property Information Network, Inc. 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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643 Main St

Single Family Home for sale in Harwich, MA

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