640 Townsend Rd is a 1,632 square foot house on a 1.2 acre lot with 4 bedrooms and 2 bathrooms. Based on Redfin's Groton data, we estimate the home's value is $601,516.
Single-familyProperty Type
1978Year Built
1.2 acresLot Size
$369Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$601,516
$1,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 8.8% lower than the average sale price ($660K) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2026
$7,906 (−0.4%)
$221,900 + $313,000
$534,900
2025
$7,941 (+2.1%)
$211,300 + $309,400
$520,700
2024
$7,777 (+3.3%)
$211,300 + $304,100
$515,400
2023
$7,529 (+8.6%)
$211,300 + $270,100
$481,400
2022
$6,933 (+3.8%)
$181,800 + $221,500
$403,300
2021
$6,676 (+5.0%)
$175,500 + $203,800
$379,300
2020
$6,359 (+2.1%)
$173,800 + $192,100
$365,900
2019
$6,230 (+4.5%)
$172,000 + $172,000
$344,000
2018
$5,963 (+2.8%)
$168,400 + $151,000
$319,400
2017
$5,801 (−0.4%)
$166,700 + $151,000
$317,700
2016
$5,824 (+2.9%)
$160,000 + $150,100
$310,100
2015
$5,658 (+5.1%)
$160,000 + $149,700
$309,700
2014
$5,383 (+3.2%)
$160,000 + $149,700
$309,700
2013
$5,218 (+3.1%)
$160,000 + $149,700
$309,700
2012
$5,059 (−4.5%)
$164,900 + $149,700
$314,600
2011
$5,296 (+2.2%)
$173,600 + $149,700
$323,300
2010
$5,184 (+2.6%)
$177,400 + $151,100
$328,500
2009
$5,051
$201,600 + $151,100
$352,700
Tax history for 640 Townsend Rd
Year
Property tax
Land + Additions
Assessment*
2026
$7,906 (−0.4%)
$221,900 + $313,000
$534,900
2025
$7,941 (+2.1%)
$211,300 + $309,400
$520,700
2024
$7,777 (+3.3%)
$211,300 + $304,100
$515,400
2023
$7,529 (+8.6%)
$211,300 + $270,100
$481,400
2022
$6,933 (+3.8%)
$181,800 + $221,500
$403,300
2021
$6,676 (+5.0%)
$175,500 + $203,800
$379,300
2020
$6,359 (+2.1%)
$173,800 + $192,100
$365,900
2019
$6,230 (+4.5%)
$172,000 + $172,000
$344,000
2018
$5,963 (+2.8%)
$168,400 + $151,000
$319,400
2017
$5,801 (−0.4%)
$166,700 + $151,000
$317,700
2016
$5,824 (+2.9%)
$160,000 + $150,100
$310,100
2015
$5,658 (+5.1%)
$160,000 + $149,700
$309,700
2014
$5,383 (+3.2%)
$160,000 + $149,700
$309,700
2013
$5,218 (+3.1%)
$160,000 + $149,700
$309,700
2012
$5,059 (−4.5%)
$164,900 + $149,700
$314,600
2011
$5,296 (+2.2%)
$173,600 + $149,700
$323,300
2010
$5,184 (+2.6%)
$177,400 + $151,100
$328,500
2009
$5,051
$201,600 + $151,100
$352,700
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Permits
Feb 13, 2025 • Active
Sheet metal/mechanical
Install ductwork for a second floor heat pump system.
HVAC
Feb 11, 2025 • Active
Electrical
Install new heat pumps and perform an electrical service upgrade to 200 amps.
Electrical
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Basement Information
Basement Sq. Ft: 816
Bathroom Information
# of Full Baths: 2
Heating & Cooling
Heating Type: Forced Hot Water
Fireplace Information
Fireplace Type: Wood Stove
Has Fireplace
Room Information
# of Rooms: 8
Exterior
Exterior Information
Physical Condition: Average
Building Style Type: Colonial
Exterior Wall: Wood Siding/Shingle
Roof Shape Type: Gable
Property Information
Living Sq. Ft: 1,632
Gross Sq. Ft: 3,336
Ground Floor Sq. Ft: 816
# of Units: 1
# of Stories: 2
Lot Information
# of Buildings: 1
Land Sq. Ft: 52,272
Municipality Name: GROTON
Acres: 1.2
Zoning Code: RA
State Use Description: 1-FAMILY RESIDENCE
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 1,632
Stories: 2.0
Lot Size: 1.2 acres
Style: Single Family Residential
Year Built: 1978
Year Renovated: —
County: Middlesex County
APN: 520711S
Home facts updated by county records on Jul 29, 2026
Around this home
Schools
Groton Dunstable Regional Middle School
Public 5-8 • Assigned • 3.5mi
7/10
Groton-Dunstable Regional High School
Public 9-12 • Assigned • 5.5mi
9/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
4/10 Fire Factor
1% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 96° expected this year, 16 days in 30 years
5/10 Wind Factor
26% chance of strong winds in next 30 years
2/10 Air Factor
1 unhealthy days expected this year, 1 days in 30 years
Provided by First Street
Historical weather
Groton, MA • 01450
Average low and high temperatures (°F)
31
17
34
18
50
30
60
39
68
49
79
60
84
65
80
58
74
54
63
43
50
34
36
22
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 9 hours in
June and 4.3 hours in December, placing it below the
U.S. average for solar exposure.
9 hrs
4.3 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$572,000 – $692,000
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