For sale

Price cut: $100K (9/15)

$1,299,000

643 Main Street, Harwich, MA 02645

6beds

2,872sqft

$7,813/mo

Get pre-qualified

Single Family Residence

Built in 1919

1.43 Acres Lot

$1,239,600 Zestimate^®

$452/sqft

$-- HOA

What's special

Fire pitBeautifully landscaped backyard

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 automotive repair 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!

53 days
1,188
26

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 6
Bathrooms: 3
Full bathrooms: 3

Heating

Cooling

Has cooling: Yes

Appliances

Included: Dishwasher, Microwave, Electric Range, Refrigerator, Washer, Water Heater
Laundry: Electric Dryer, Electric Dryer Hookup, Washer Hookup

Features

HU Cable TV, Recessed Lighting
Flooring: Wood, Tile, Carpet
Basement: Full
Number of fireplaces: 1

Interior area

Total structure area: 2,872
Total interior livable area: 2,872 sqft

Property

Parking

Total spaces: 8
Parking features: Detached, Direct Access, Garage Door Opener, Heated Garage, Storage, Driveway, Paved
Garage spaces: 2
Has uncovered spaces: Yes

Features

Stories: 2
Patio & porch: Patio, Porch
Exterior features: Garden

Lot

Size: 1.43 Acres
Features: Cleared, Level

Details

Parcel number: HARW M:40 B: L:E40
Special conditions: None

Construction

Type & style

Home type: SingleFamily
Property subtype: Single Family Residence

Materials

Shingle Siding
Roof: Asphalt

Condition

Year built: 1919

Utilities & green energy

Water: Public

Community & HOA

HOA

Has HOA: No

Location

Region: Harwich

Financial & listing details

Price per square foot: $452/sqft
Tax assessed value: $974,800
Annual tax amount: $5,664
Date on market: 7/27/2026
Cumulative days on market: 53 days

Estimated market value

$1,239,600

$1.18M - $1.30M

$4,650/mo

Price history

Date	Event	Price
9/15/2026	Price change	$1,299,000-7.1%$452/sqft
Source: MLS PIN #73555500 Report a problem
7/27/2026	Listed for sale	$1,399,000+2698%$487/sqft
Source: MLS PIN #73555500 Report a problem
7/10/2001	Sold	$50,000$17/sqft
Source: Public Record Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$5,599 +5.9%	$947,300 +8.1%
2024	$5,286 +3.5%	$876,600 +14%
2023	$5,107 +1.7%	$769,100 +24.2%
2022	$5,020 -1.7%	$619,000 +4.2%
2021	$5,108 +0.8%	$593,900 +2.3%
2020	$5,067 +3.4%	$580,400 +2.7%
2019	$4,901 +5.1%	$565,300 +6.7%
2018	$4,663 +3.2%	$529,900 +5.2%
2017	$4,520 +2.9%	$503,900 +4%
2016	$4,394	$484,400