Pending

$849,000

21 Old Colony Road, Harwich, MA 02645

4beds

2,031sqft

$5,215/mo

Get pre-qualified

Single Family Residence

Built in 1965

1.33 Acres Lot

$842,800 Zestimate^®

$418/sqft

$-- HOA

What's special

Enclosed porchOne-car garageFlexible floor plan

Set on a spacious 1.3-acre lot in desirable Harwich Center, this 3-bedroom, 2-bath Cape offers exceptional space, versatility, and potential. The home features an enclosed porch, a flexible floor plan, and a one-car garage. An additional 456 sq. ft, detached one-bedroom ADU has been completely gutted and is ready to be finished—ideal for guest accommodations, extended family, a home office, studio, or potential rental income, subject to town approvals. The expansive lot offers plenty of room to create a private outdoor retreat, with potential for a pool or future expansion. Ideally located near Brooks Park for pickleball and recreation, the Cape Cod Rail Trail, Harwich Center shops and restaurants, and the beaches, dining, and boutiques of Harwich Port. A unique opportunity with endless possibilities in the heart of Harwich!

33 days
1,025
44

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 4
Bathrooms: 2
Full bathrooms: 2

Heating

Cooling

None

Appliances

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

Features

Linen Closet
Flooring: Hardwood, Tile
Basement: Full
Number of fireplaces: 1

Interior area

Total structure area: 2,031
Total interior livable area: 2,031 sqft

Property

Parking

Total spaces: 4
Parking features: Detached, Storage, Off Street, Paved
Garage spaces: 1

Features

Stories: 1
Patio & porch: Porch, Screened Porch

Lot

Size: 1.33 Acres
Features: Cleared, Level

Details

Additional structures: Guest House, Outbuilding
Parcel number: HARW M:41 B: L:B780
Special conditions: None

Construction

Type & style

Home type: SingleFamily
Property subtype: Single Family Residence

Materials

Shingle Siding
Roof: Asphalt,Pitched

Condition

Year built: 1965

Utilities & green energy

Water: Public

Community & HOA

Location

Region: Harwich

Financial & listing details

Price per square foot: $418/sqft
Tax assessed value: $857,100
Annual tax amount: $4,980
Date on market: 8/18/2026
Cumulative days on market: 12 days

Estimated market value

$842,800

$801,000 - $885,000

$3,584/mo

Price history

Date	Event	Price
9/9/2026	Pending sale	$849,000$418/sqft
Source: MLS PIN #73566214 Report a problem
8/27/2026	Contingent	$849,000$418/sqft
Source: MLS PIN #73566214 Report a problem
8/27/2026	Pending sale	$849,000$418/sqft
Source: CCIMLS #22604030 Report a problem
8/18/2026	Listed for sale	$849,000$418/sqft
Source: CCIMLS #22604030 Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$4,914 +3%	$831,400 +5.1%
2024	$4,771 +3.3%	$791,200 +13.7%
2023	$4,619 +1.7%	$695,700 +24.2%
2022	$4,542 -0.3%	$560,100 +5.7%
2021	$4,556 +0.1%	$529,800 +1.6%
2020	$4,552 +5.4%	$521,400 +4.6%
2019	$4,320 +7.4%	$498,300 +9%
2018	$4,023 +4.5%	$457,200 +6.6%
2017	$3,848 +2.1%	$429,000 +3.2%
2016	$3,769	$415,500