Active
44 Days on market
643 Main St Harwich — Photo 1 of 42

643 Main St Harwich — Photo 1 of 42

$1,399,000

643 Main St, Harwich, MA 02645

Harwich, MA 02645

Beds

6

Baths

3

SqFt

2,872

Style

Single Family

Built

1919

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!

Market Value Analysis

This Property
Size (SqFt) →Price →
This Property$487/sqft
Local Avg (Harwich)$672/sqft
28% BelowMarket Average

* Analysis is based on 22 actively listed and recently sold comparable properties strictly within Harwich, MA.

Property Details

Financials

Original Price$1,399,000
Annual Taxes$5,664

Parking

Garage2
Off-Street10

Interior Specifications

Total Rooms11
Fireplaces1
FlooringWood, Tile, Carpet, Flooring - Wood, Flooring - Wall to Wall Carpet
BasementFull, Interior Entry, Bulkhead

Climate & Utilities

HeatingBaseboard, Oil
CoolingWindow Unit(s)
WaterPublic
SewerPrivate Sewer

Building & Exterior

ConstructionFrame
RoofShingle
FoundationBlock
ZoningR

Property & Lot

Acres1.43
SqFt Lot62,291
Lot FeaturesCleared, Level

Amenities & Appliances

Electric Water Heater • Water Heater • Range • Dishwasher • Microwave • Refrigerator • Washer • Dryer

Neighborhood

Golf • Bike Path • Conservation Area • House of Worship • Public School

Geography

Floorplan Breakdown

Structural Layout

Second
Bedroom 2Bedroom 3Bedroom 4Bedroom 5Bathroom 2
First
Living RoomDining RoomKitchenOfficeFamily RoomMaster BedroomBathroom 1
Living Room
Lvl First

18.6 x 11.6

Flooring - Wall to Wall Carpet

Dining Room
Lvl First

10.8 x 11.7

Flooring - Wall to Wall Carpet

Kitchen
Lvl First

16.5 x 11.7

Flooring - Wood, Kitchen Island, Cabinets - Upgraded, Recessed Lighting

Office
Lvl First

9.1 x 11.6

Flooring - Wood

Family Room
Lvl First

21.8 x 27.3

Flooring - Wall to Wall Carpet, Recessed Lighting

Master Bedroom
Lvl First

11.7 x 17.1

Closet, Flooring - Wall to Wall Carpet

Bedroom 2
Lvl Second

14 x 11.2

Bedroom 3
Lvl Second

10.3 x 11.11

Closet, Flooring - Wood

Bedroom 4
Lvl Second

9.4 x 8.4

Closet, Flooring - Wood

Bedroom 5
Lvl Second

9.1 x 9.3

Closet, Flooring - Wood

Bathroom 1
Lvl First

11.7 x 5.4

Bathroom 2
Lvl Second

6.9 x 8.4

Population

11,288

U.S. Census Bureau, ACS 2024 5-Year Estimates (B01003)

Median Household Income

$104K

U.S. Census Bureau, ACS 2024 5-Year Estimates (B19013)

Renter-Occupied Homes

15.6%

U.S. Census Bureau, ACS 2024 5-Year Estimates (B25003)

New Construction Permits — Barnstable County

513 housing units permitted in the last 12 months (-50% vs the prior 12 months) — 128 in 5+ unit buildings

U.S. Census Bureau, Building Permits Survey (through Jun '26)

ADU Potential

Massachusetts allows one accessory dwelling unit by right in single-family zoning districts statewide (M.G.L. c. 40A §3; 760 CMR 71.00, effective Feb 2025). Estimated maximum ADU size for this property: 900 sq ft (the lesser of 900 sq ft or half the 2,872 sq ft principal dwelling). Lot size: 62,291 sq ft.

Based on listing data, which indicates the property type — not the zoning district. Local dimensional, septic (Title 5), and historic-district requirements still apply. Not legal advice — verify with the municipality.

Listing Provided By

Listing Agent: Richard J. Waystack

Listing Office: William Raveis Harwich Port

MLS® Number: 73555500

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