643 Main Street, Harwich, MA, 02645
About This Home
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!
Getting Around
Car-Dependent
Very Limited Transit
BikeableSchools
Construction
Condition
- Property condition: Approximate
- Year built: 1919
Materials
- Foundation: Block
- Roof: Asphalt
- Construction materials: Shingle Siding
Type & Style
- Home type: SingleFamily
- Architectural style: Cape Cod
- Property subType: Single Family Residence
Interior
Appliances
- Appliances included: Dishwasher,Washer,Refrigerator,Electric Range,Microwave,Electric Dryer,Electric Water Heater
- Laundry features: Laundry Room,First Floor
Basement
- Has basement: Yes
- Basement: Bulkhead Access,Interior Entry,Full
Bedroom2
- Features: Bedroom 2, Closet
- Level: Second
- Area: 156.8
Bedroom3
- Features: Bedroom 3, Closet
- Level: Second
- Area: 114.433
Bedroom4
- Features: Bedroom 4, Closet
- Level: Second
- Area: 78.96
Bedrooms & Bathrooms
- Bedrooms: 6
- Bathrooms: 3
- Full bathrooms: 3
Dining Room
- Features: Dining Room
- Level: First
- Area: 126.36
Features
- HU Cable TV,Recessed Lighting
- Flooring: Wood,Carpet,Tile
- Number of fireplaces: 1
- Fireplace: Yes
Heating
- Heating features: Hot Water
Interior Area
- Total structure area: 2,872
- Total interior livable area: 2,872 sqft
Kitchen
- Features: Kitchen, Upgraded Cabinets, Kitchen Island, Recessed Lighting
- Level: First
- Area: 193.05
Living Room
- Features: Living Room
- Level: First
- Area: 215.76
Master Bedroom
- Features: Closet
- Level: First
- Area: 200.07
Property
Details
- Parcel number: HARW M:40 B: L:E40
- Zoning: R
- Special condition: None
- Foundation area: 1392
Features
- Stories: 2
- Patio & porch: Patio,Porch
- Exterior features: Garden
Lot
- Lot size: 1.43 Acres
- Features: Bike Path,School,Major Highway,House of Worship,Cape Cod Rail Trail,Shopping,In Town Location,Conservation Area,Cleared,Level
Parking
- Total spaces: 8
- Parking features: Garage,Open
- Has garage: Yes
- Attached garage spaces: 2
- Covered spaces: 2
- Has uncovered spaces: Yes
Climate Risk is Financial Risk
Every home has a financial story beyond the listing price. Below, you’ll see the climate risks that could affect this property — and in Bills & Affordability, how those risks may influence repairs, insurance, utilities, and long-term value.
Biggest Threats for This Home
- Coastal Flooding
- Inland Flooding
- Hurricane
- Lightning
- Tsunami
How This Home’s Risks Compare
FEMA Declared Disasters Across Massachusetts Counties
Understanding the Costs
Financial advisors generally recommend spending no more than 30% of your gross household income on housing costs. In practice, many households stretch to 35% or beyond — especially in high-cost markets.
Estimated Costs Today
| Monthly | Annual | |
|---|---|---|
| Mortgage | $7,074 | $84,888 |
| Home Insurance * | $557 | $6,684 |
| Property Taxes | $657 | $7,884 |
| Electricity | $566 | $6,796 |
| Total | $8,854 | $106,248 |
Income You'd Need if You Spent...
Massachusetts FAIR Plan Programs
How Costs Could Change Over Time
Climate risk is quickly impacting all of the major home ownership costs. Adjust the growth rates and percentage of income spent on housing below to see how your housing costs could change over the next 10 years — and what income you'd need to keep up.
Comparing Against the Market
Price Per Sq Ft
vs Other Active Listings
Avg $/sqft
vs Homes Sold Last Month
Median $/sqft
Current Market Trends
Median Price Per Square Foot
The median price per square foot of homes sold in this area each month. Compare this to this listing's price per square foot to gauge whether the home is priced in line with recent sales.
Historicals for This Listing
Zestimate History ($/sqft)
Price History
| Date | Event | Price |
|---|---|---|
| 2026-07-27 | Listed for sale | $1,399,000 |
| 2001-07-10 | Sold | $50,000 |
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