643 Main Street, Harwich, MA 02645
Property image
Property image
FOR SALE
3D VIEW
1.43 ACRES

$1,399,000

  • 6 Beds
  • 3 Baths
  • 2,872 sqft (on 1.43 acres)

643 Main Street, Harwich, MA 02645

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Home Highlights

Single-Family Home
Built in 1919
1.43 acre lot
$487/sqft
Garage

Local Information

  • Map ViewExplore the area around 643 Main Street.
  • Schools1 Preschool School2 Elementary Schools2 Middle Schools1 High School
  • Shop & Eat
-- mins to
Commute Destination

About this House

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!
Last check for updates: about 15 hours ago
Listing courtesy of Richard J Waystack, (508) 776-0964
Keller Williams Realty
Source: CCIMLS, MLS#22603623
Also Listed on MLS PIN, MLS PIN, CCIMLS.

Home Details for 643 Main Street

Interior Features

Interior Details
Basement: FullNumber of Rooms: 11
Beds & Baths
Number of Bedrooms: 6Number of Bathrooms: 3Number of Bathrooms (full): 3
Appliances & Utilities
Appliances: Dishwasher, Microwave, Electric Range, Refrigerator, Washer, Water HeaterDishwasherLaundry: Electric Dryer,Electric Dryer Hookup,Washer HookupMicrowaveRefrigeratorWasher
Heating & Cooling
Heating: OilHas CoolingHas HeatingHeating Fuel: Oil
Fireplace & Spa
Number of Fireplaces: 1
Windows, Doors, Floors & Walls
Flooring: Wood, Tile, Carpet
Levels, Entrance, & Accessibility
Stories: 2Floors: Wood, Tile, Carpet

Exterior Features

Exterior Home Features
Roof: AsphaltPatio / Porch: Patio, PorchExterior: GardenGarden
Parking & Garage
Number of Garage Spaces: 2Has a GarageNo Attached GarageHas Open ParkingParking Spaces: 8Parking: Detached,Direct Access,Garage Door Opener,Heated Garage,Storage,Driveway,Paved
Frontage
Not on Waterfront

Days on Market

Cumulative Days on Market: 41Days on Market: 45

Property Information

Year Built
Year Built: 1919
Property Type / Style
Property Type: ResidentialProperty Subtype: Single Family Residence
Building
Construction Materials: Shingle SidingDoes Not Include Home Warranty
Property Information
Parcel Number: HARW M:40 B: L:E40

Price & Status

Price
List Price: $1,399,000Price Per Sqft: $487

Active Status

MLS Status: Active

Location

Direction & Address
City: Harwich

Agent Information

Listing Agent
Listing ID: 22603623

Building

Building Area
Building Area: 2872 Square Feet

HOA

No HOA

Lot Information

Lot Area: 1.43 Acres

Listing Info

Special Conditions: None

Miscellaneous

BasementMls Number: 22603623Showing Requirements: Appointment Required, Call Listing Agent

Around this home

What Locals Say about Harwich

At least 46 Trulia users voted on each feature.

  • 91 % Say car is needed

  • 90 % Say parking is easy

  • 88 % Say yards are well-kept

  • 83 % Say there's wildlife

  • 83 % Say it's dog friendly

  • 80 % Say it's quiet

  • 76 % Say they plan to stay for at least 5 years

  • 76 % Say people would walk alone at night

  • 70 % Say there's holiday spirit

  • 69 % Say neighbors are friendly

  • 47 % Say kids play outside

  • 39 % Say it's walkable to grocery stores

  • 39 % Say there are community events

  • 36 % Say streets are well-lit

  • 35 % Say it's walkable to restaurants

  • 29 % Say there are sidewalks

Sourced by Trulia users. Learn more about our methodology.
  • Arunajoejoe
    "There are great schools, parks, ocean & lake beaches, dog parks & a very cute village. We love living here! "
    0
    Flag
  • Sandie.reardon
    "Good open spaces and nice beaches on which to walk. People are friendly and helpful when you ask a question. "
    2
    Flag
  • Sbuchanon
    "Clean, friendly, organized local govt w great communication, lovely community, excellent services for seniors."
    1
    Flag
  • Arunajoejoe
    "It’s a beautiful area with lots of lakes, ponds and beaches. Two quaint villages and lots of friendly people."
    0
    Flag
  • Gij71
    "There is a main road and cars drive very fast on it not a good area to let young children outside unsupervised. I would suggest a fenced in yard. "
    0
    Flag
  • Caper
    "Dog owners would love taking the dogs to the public beach on Seymour Pond. Plus we see many dog owners walking their dogs on the bike path."
    0
    Flag
  • Lisab8896
    "Everyone knows one another’s dogs! However a neighbor ignores the leash law which is super annoying Also there are coyotes out and about."
    4
    Flag
  • Anthony D.
    "This is a cute summer town to visit. Lots of great restaurants and cute shops. The weather here esp in August is amazing "
    1
    Flag
  • Lilsweeti56
    "Good families. Mostly friendly. Nice beaches around and a few parks. Not a fan of Chatham but go once and awhile for restaurants there "
    1
    Flag
  • Danielle S.
    "All of the neighbors know each other and communicate often. There sometimes are parties or get togethers as well. It’s a super comfortable area."
    3
    Flag
  • Sydney R.
    "Many people bring their dogs on the bike trail and the park. Most of the dogs are kind, none of them really bite. "
    0
    Flag
  • Danielle S.
    "Long pond and bike path are super close! It’s a quiet area where most neighbors know each other. Pets and kids are out a lot."
    1
    Flag
  • Meghan
    "nice houses, pride of ownership shows from the road on most properties. safe and convenient to highway, restaurants & shopping. close to many beaches."
    0
    Flag
  • Raven B.
    "It is easy to get around in the winter, however when its summer time, forget about it. You are better off biking along the trails. "
    0
    Flag
  • Emily S.
    "Harwich is a low crime area, which is nice when you have children. Harwich also has a great school system. "
    0
    Flag
  • Michelleolson
    "Long Pond lake living, right next to bike trail, bikeable to Harwichport and Brewster. 100 minute drive to Boston"
    0
    Flag
  • Nancy P.
    "The town Fire chief lives down the street and it’s a good mix of summer and year round residents. Couple houses are neglected but hope that changes "
    0
    Flag
  • Parulia
    "It’s a beautiful and charming beach community with a share of year round residents. We love it. "
    0
    Flag
  • Raymond C.
    "One of the best area's to live in on the entire Cape, convenient to everything and great school system"
    0
    Flag

Market trends in Harwich

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
23
11MoM

Home Value

Trulia Estimate
$1.32M
Since last month
Decreased$71K (-5.1%)
Since last year
Increased$334K (+33.8%)
Since last sale
Increased$1M (+2,545.2%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +123% in the last 10 years
MonthEstimated value
2026
September 2026$1.32M
August 2026$1.33M
July 2026$1.39M
June 2026$1.05M
May 2026$1.05M
April 2026$1M
March 2026$967K
February 2026$941K
January 2026$948K
2025
2024
2023
2022
2021
2020

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
4 Chloe's Path, Harwich, MA
0.27
Single-Family Home
$2,195,000
06/12/26
4
3.5
2,528
2 Bassett Woods Road, Harwich, MA
0.52
Single-Family Home
$1,550,000
04/08/26
4
3.5
3,351
666 Main Street, Harwich, MA
0.11
Single-Family Home
$591,000
02/18/26
3
2
1,787
116 Sisson Rd, Harwich Port, MA
0.55
Single-Family Home
$1,100,000
11/17/25
4
2.5
2,401
28 Old Colony Road, Harwich, MA
0.46
Single-Family Home
$1,765,000
06/05/26
4
3
3,100
135 Sisson Rd, Harwich Port, MA
0.51
Single-Family Home
$585,000
03/20/26
3
3
2,330
135 Sisson Road, Harwich, MA
0.51
Single-Family Home
$585,000
03/20/26
3
3
2,330
101 Parallel Street, Harwich, MA
0.35
Single-Family Home
$900,000
09/26/25
3
2
2,096
307 Bank Street, Harwich, MA
0.58
Single-Family Home
$1,000,000
11/14/25
4
2.5
2,388
7 Park Street, Harwich, MA
0.41
Single-Family Home
$1,210,000
07/20/26
3
2.5
2,068

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
648 Main Street, Harwich, MA 02645
0.05
$995,900
4
2.5
2,176
Off Market
10 Parallel Street, Harwich, MA 02645
0.09
$858,700
3
2.5
1,596
Off Market
646 Main Street, Harwich, MA 02645
0.09
$785,700
4
1.5
2,000
Off Market
2 Parallel Street, Harwich, MA 02645
0.13
$1,069,300
4
2.5
2,462
Off Market
666 Main Street, Harwich, MA 02645
0.11
$591,000
3
2
1,787
Recently Sold
276 South Street, Harwich, MA 02645
0.17
$1,019,800
8
4
1,499
Off Market
55 Parallel Street, Harwich, MA 02645
0.15
-
-
-
-
Off Market
198 Sisson Road, Harwich, MA 02645
0.27
$428,300
3
1
564
Off Market
4 Chloe's Path, Harwich, MA 02645
0.27
$2,195,000
4
3.5
2,528
Recently Sold
184 Sisson Road, Harwich, MA 02645
0.30
$591,600
2
1
918
Off Market
475 Sisson Road, Harwich, MA 02645
0.28
$808,100
4
2
2,142
Off Market

Price and Tax history

DateEventPrice
Jul 27, 2026
Source: MLS PIN #73555500
Listed For Sale
$1,399,000
Jul 10, 2001
Source: N/A
Sold
$50,000

LGBTQ Local Legal Protections

Richard J Waystack, Keller Williams Realty
Agent Phone: (508) 776-0964
All data relating to real estate for sale on this page comes from the Broker Reciprocity (BR) of the Cape Cod & Islands Multiple Listing Service, Inc. Detailed information about real estate listings held by brokerage firms other than CC&I Assoc. of REALTORS®, Inc. includes the name of the listing company. Neither the listing company nor CC&I Assoc. of REALTORS®, Inc. shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. The Broker providing this data believes it to be correct, but advises interested parties to confirm any item before relying on it in a purchase decision. This site was last updated 2026-09-10 15:43:20 PDT. All properties are subject to prior sale, changes, or withdrawal. Copyright 2026© Cape Cod & Islands Multiple Listing Service, Inc. All rights reserved.

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Frequently asked questions about 643 Main Street

  • What is the estimated monthly payment for 643 Main Street?
    Based on a $1,399,000 list price with 20% down at today's rates, the estimated monthly payment for 643 Main Street in Harwich, MA is approximately $8,342 (about $7,556 principal & interest, $711 property taxes, and $75 homeowner's insurance). This is an estimate. Actual payment depends on your loan terms.
  • What do residents say about Harwich?
    Residents describe Harwich, MA as easy to park in, well-kept, and dog-friendly. Most residents say you need a car. See homes for sale in Harwich, MA.
  • What are the closest schools to 643 Main Street?
    The closest schools to 643 Main Street in Harwich, MA are Harwich Elementary School (Pre-K, rated 6/10), Monomoy Regional High School (Middle, rated 5/10), Monomoy Regional Middle School (Elementary, rated 7/10).
  • What is 643 Main Street estimated to be worth?
    Trulia's estimated value for 643 Main Street in Harwich, MA is $1,322,600.
  • Does 643 Main Street have air conditioning?
    Yes, 643 Main Street in Harwich, MA has air conditioning.
  • Does 643 Main Street have laundry facilities?
    Yes, 643 Main Street in Harwich, MA has laundry facilities.
643 Main Street, Harwich, MA 02645 is a 6 bedroom, 3 bathroom, 2,872 sqft single-family home built in 1919. This property is currently available for sale and was listed by CCIMLS on Jul 27, 2026. The MLS # for this home is MLS# 22603623.