Google street view image for 231 Mill St, Groton, MA 01450

Off market

$391,864

•

1 ba

•

984

sq ft

231 Mill St, Groton, MA 01450

About this home

231 Mill St is a 984 square foot house on a 1.8 acre lot with 2 bedrooms and 1 bathroom. Based on Redfin's Groton data, we estimate the home's value is $391,864.

Single-familyProperty Type

1997Year Built

1.8 acresLot Size

$398Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$391,864

$38K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 39.5% lower than the average sale price ($648K) of 6 comparable homes.

SOLD JUL 7, 2026
$700,000
A
3 beds2 baths1,421 sq ft
186 Common St, Groton, MA 01450
SOLD SEP 24, 2026
$530,000
B
3 beds1 bath1,104 sq ft
204 Hill Rd, Groton, MA 01450
SOLD JUL 22, 2026
$530,000
C
3 beds1 bath1,224 sq ft
16 Douglas Dr, Ayer, MA 01432
SOLD JUN 26, 2026
$560,000
D
3 beds1 bath1,391 sq ft
13 Groton Shirley Rd, Ayer, MA 01432
SOLD MAR 12, 2026
$942,000
E
3 beds2 baths2,195 sq ft
34 Shattuck St, Groton, MA 01450
SOLD AUG 24, 2026
$625,000
F
3 beds2 baths2,071 sq ft
111 Lawton Rd, Shirley, MA 01464

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Earn from this home

Sell

$371,443

Est. take-home

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Rent

$2,249/mo

Redfin rental estimate

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Market trends in 01450, MA

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

100.5%

+0.4% MoM

Median sale price

$851K

$24K MoM

Avg. days on market

27d

0 days MoM

Recently sold homes

11 MoM

New listings for sale

$729,000
3 beds2.5 baths1,868 sq ft
716 Martins Pond Rd, Groton, MA 01450
$675,000
4 beds1.5 baths2,448 sq ft
7 Shepley St, Groton, MA 01450
3D WALKTHROUGH
$425,000
3 beds1.5 baths2,015 sq ft
79 Kemp Unit A, Groton, MA 01450
See all

Provided by Redfin

Sale history for 231 Mill St

As the MLS and public records start to fill up, we'll list the details here.

Year

Property tax

Land + Additions

Assessment*

2026

$1,887 (−78.6%)

$127,700

2025

$8,831 (+7.1%)

$224,500 + $354,600

$579,100

2024

$8,245 (+5.3%)

$224,500 + $321,900

$546,400

2023

$7,833 (+3.1%)

$224,500 + $276,300

$500,800

2022

$7,595 (+15.7%)

$192,800 + $249,000

$441,800

2021

$6,567 (+10.5%)

$185,600 + $187,500

$373,100

2020

$5,942 (−0.3%)

$183,700 + $158,200

$341,900

2019

$5,960 (+1.6%)

$181,900 + $147,200

$329,100

2018

$5,866 (+1.2%)

$178,100 + $136,100

$314,200

2017

$5,796 (+0.4%)

$176,200 + $141,200

$317,400

2016

$5,773 (+2.8%)

$167,500 + $139,900

$307,400

2015

$5,616 (+5.1%)

$167,500 + $139,900

$307,400

2014

$5,343 (+3.2%)

$167,500 + $139,900

$307,400

2013

$5,178 (+3.0%)

$167,500 + $139,800

$307,300

2012

$5,027 (−3.8%)

$172,800 + $139,800

$312,600

2011

$5,225 (+5.7%)

$181,900 + $137,100

$319,000

2010

$4,945

$196,700 + $116,700

$313,400

2009

$4,948

$223,500 + $122,000

$345,500

Tax history for 231 Mill St

Year

Property tax

Land + Additions

Assessment*

2026

$1,887 (−78.6%)

$127,700

2025

$8,831 (+7.1%)

$224,500 + $354,600

$579,100

2024

$8,245 (+5.3%)

$224,500 + $321,900

$546,400

2023

$7,833 (+3.1%)

$224,500 + $276,300

$500,800

2022

$7,595 (+15.7%)

$192,800 + $249,000

$441,800

2021

$6,567 (+10.5%)

$185,600 + $187,500

$373,100

2020

$5,942 (−0.3%)

$183,700 + $158,200

$341,900

2019

$5,960 (+1.6%)

$181,900 + $147,200

$329,100

2018

$5,866 (+1.2%)

$178,100 + $136,100

$314,200

2017

$5,796 (+0.4%)

$176,200 + $141,200

$317,400

2016

$5,773 (+2.8%)

$167,500 + $139,900

$307,400

2015

$5,616 (+5.1%)

$167,500 + $139,900

$307,400

2014

$5,343 (+3.2%)

$167,500 + $139,900

$307,400

2013

$5,178 (+3.0%)

$167,500 + $139,800

$307,300

2012

$5,027 (−3.8%)

$172,800 + $139,800

$312,600

2011

$5,225 (+5.7%)

$181,900 + $137,100

$319,000

2010

$4,945

$196,700 + $116,700

$313,400

2009

$4,948

$223,500 + $122,000

$345,500

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Permits

Jul 22, 2024 • Final

Electrical

Replace a corroded electrical disconnect.

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: 984

Bathroom Information
# of Full Baths: 1

Heating & Cooling
Heating Type: Forced Hot Water

Room Information
# of Rooms: 4

Exterior

Exterior Information
Physical Condition: Average
Building Style Type: Ranch
Exterior Wall: Vinyl
Roof Shape Type: Gable

Property Information
Living Sq. Ft: 984
Gross Sq. Ft: 1,968
# of Units: 1
# of Stories: 1

Lot Information
# of Buildings: 1
Land Sq. Ft: 78,408
Municipality Name: GROTON
Acres: 1.8
Zoning Code: RA
State Use Description: MIXED USE-PRIM RES & COMM

Financial

Assessor Information
Assessment Year: 2026

Public facts

Beds: 2
Baths: 1.0
Sq. Ft.: 984
Stories: 1.0
Lot Size: 1.8 acres
Style: Single Family Residential
Year Built: 1997
Year Renovated: —
County: Middlesex County
APN: 2867164S

Home facts updated by county records on Sep 10, 2026

Around this home

Schools

Groton Dunstable Regional Middle School

Public 5-8 • Assigned • 0.5mi

7/10

Groton-Dunstable Regional High School

Public 9-12 • Assigned • 3.2mi

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

0.93% chance of being in a wildfire in next 30 years

4/10 Heat Factor

7 days above 96° expected this year, 15 days in 30 years

6/10 Wind Factor

27% 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)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

Try the sun simulator tool to see how light moves across the property at different times of day and year.

Provided by Shadowmap

Estimated sale price

$373,000 – $451,000

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Nearby similar homes

$1,249,999

5 beds5 baths5,066 sq ft

18 Loon Hill Rd, Ayer, MA 01432

3D WALKTHROUGH

$544,900

3 beds2 baths2,376 sq ft

112 Walker Rd, Shirley, MA 01464

$783,000

4 beds2.5 baths2,306 sq ft

10 Fairway Dr, Groton, MA 01450

$965,000

4 beds3 baths2,550 sq ft

138 Sand Hill Rd, Groton, MA 01450

$385,000

3 beds1 bath1,547 sq ft

33 Park St, Ayer, MA 01432

$769,900

3 beds2.5 baths2,438 sq ft

7 Trout Brook Way, Shirley, MA 01464

New listings for sale in 01450

$729,000

3 beds2.5 baths1,868 sq ft

716 Martins Pond Rd, Groton, MA 01450

$675,000

4 beds1.5 baths2,448 sq ft

7 Shepley St, Groton, MA 01450

3D WALKTHROUGH

$425,000

3 beds1.5 baths2,015 sq ft

79 Kemp Unit A, Groton, MA 01450

Home values near 231 Mill St

Data from public records.

Address	Redfin Estimate
197 Mill Street, Groton, MA 4 Beds \| 2.5 Baths \| 2700 Sq. Ft.	$845,936
210 Mill Street, Groton, MA 2 Beds \| 2 Baths \| 1632 Sq. Ft.	$580,363

Address	Redfin Estimate
241 Mill Street, Groton, MA 3 Beds \| 1 Baths \| 1626 Sq. Ft.	$581,926
195 Mill Street Unit B, Groton, MA 2 Beds \| 1.5 Baths \| 1590 Sq. Ft.	$554,648

Address	Redfin Estimate
195 Mill Street Unit A, Groton, MA 3 Beds \| 1.5 Baths \| 1542 Sq. Ft.	$432,424
219 Mill Street, Groton, MA 3 Beds \| 1 Baths \| 1272 Sq. Ft.	$515,851

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