For sale

$849,000

21 Old Colony Road, Harwich, MA 02645

4beds

1,575sqft

$4,990/mo

Get pre-qualified

Single Family Residence

Built in 1965

1.33 Acres Lot

$-- Zestimate^®

$539/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 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!

10 hours

414

33

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 4
Bathrooms: 2
Full bathrooms: 2
Main level bathrooms: 2

Heating

Hot Water

Cooling

None

Appliances

Included: Electric Range, Refrigerator, Electric Water Heater

Features

Linen Closet
Flooring: Hardwood, Tile
Basement: Bulkhead Access,Interior Entry,Full
Number of fireplaces: 1

Interior area

Total structure area: 1,575
Total interior livable area: 1,575 sqft

Property

Parking

Total spaces: 4
Parking features: Garage
Garage spaces: 1

Features

Stories: 1
Patio & porch: Porch, Screened Porch

Lot

Size: 1.33 Acres
Features: Bike Path, School, Major Highway, House of Worship, Near Golf Course, Cape Cod Rail Trail, Shopping, In Town Location, Cleared, Level

Details

Additional structures: Outbuilding
Parcel number: HARW M:41 B: L:B780
Zoning: R
Special conditions: None

Construction

Type & style

Home type: SingleFamily
Architectural style: Cape Cod
Property subtype: Single Family Residence

Materials

Shingle Siding
Foundation: Concrete Perimeter
Roof: Asphalt, Pitched

Condition

Actual
New construction: No
Year built: 1965

Utilities & green energy

Sewer: Septic Tank, Septic Tank

Community & HOA

HOA

Has HOA: No

Location

Region: Harwich

Financial & listing details

Price per square foot: $539/sqft
Tax assessed value: $857,100
Annual tax amount: $4,980
Date on market: 8/18/2026
Road surface type: Paved

Estimated market value

Not available

Estimated sales range

Not available

$2,560/mo

Price history

Date	Event	Price
8/18/2026	Listed for sale	$849,000$539/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