Exceptional Hopkinton development opportunity adjacent to Upton State Forest and located in one of the best school districts in Massachusetts. Preliminary review suggests the property may accommodate multiple subdivision concepts in the 10–12 lot range, depending entirely on engineering, septic testing, and all required approvals. Recent variance reform, statewide 1-acre septic standards, and updated NFPA road guidance may offer added flexibility for future planning. Buyer to perform all due diligence. Existing single-family home has a passing Title V. Land sold as-is.
Vacant landProperty Type
20.9 acresLot Size
$345,885Price/Acres
Listed by Brendon Sullivan-Monson• StartPoint Realty
Well built Colonial with huge potential. This home currently has 3,000sqft on two levels with a large basement that could add more living area if desired. Set on just under 21 acres, the property offers privacy and the opportunity to create a custom retreat. With some updating to the kitchen and bathrooms this house would be well worth the sweat equity. There is also potential to build another home off the driveway, this would require a Special Permit from the town. There has already been a site visit and a perc test done by a local engineer. The possibility of further development would be a topic to discuss with the town. This could be a great project for an investor/developer.
Year
Property tax
Land + Additions
Assessment*
2025
$12,252 (+0.4%)
$486,200 + $377,800
$864,000
2024
$12,205 (−0.5%)
$471,400 + $364,000
$835,400
2023
$12,272 (−0.6%)
$435,700 + $340,500
$776,200
2022
$12,347 (+1.9%)
$412,100 + $312,900
$725,000
2021
$12,111 (+3.6%)
$405,200 + $303,900
$709,100
2020
$11,693 (+14.8%)
$399,900 + $295,300
$695,200
2019
$10,184 (+4.5%)
$323,900 + $269,200
$593,100
2018
$9,745 (+2.8%)
$313,400 + $263,200
$576,600
2017
$9,475 (+1.1%)
$309,500 + $254,500
$564,000
2016
$9,375 (−1.3%)
$303,400 + $247,100
$550,500
2015
$9,501 (+1.9%)
$297,800 + $231,200
$529,000
2014
$9,326 (+1.8%)
$297,800 + $231,200
$529,000
2013
$9,162 (+1.4%)
$297,800 + $231,200
$529,000
2012
$9,033 (+1.9%)
$297,800 + $232,000
$529,800
2011
$8,864 (+2.7%)
$297,800 + $232,000
$529,800
2010
$8,635 (−0.4%)
$314,200 + $233,700
$547,900
2009
$8,672
$335,800 + $241,200
$577,000
Public record
Beds
4
Baths
2.5
Stories
2
Lot width
—
Lot depth
—
Lot size
20.9 Acres
Year renovated
—
Finished Sq. Ft.
3,014
Unfinished Sq. Ft.
—
Total Sq. Ft.
3,014
Year built
1986
Style
Single Family Residential
County
Middlesex County
APN
531157
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 16, 2026.
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
3/10 Fire Factor
0.15% chance of being in a wildfire in next 30 years
4/10 Heat Factor
7 days above 95° expected this year, 15 days in 30 years
6/10 Wind Factor
46% chance of strong winds in next 30 years
2/10 Air Factor
1 unhealthy days expected this year, 2 days in 30 years
Provided by First Street
Historical weather
Hopkinton, MA • 01748
Average low and high temperatures (°F)
32
19
35
20
50
31
60
40
68
50
80
60
83
65
80
58
75
55
63
45
51
35
37
23
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
87/ 100
Very good sunlight
Sunscore
There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
8.9 hrs
5.2 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 186 Spring St
$6,596,252
$633K under list price of $7.23M
Nearby comparable homes
The Redfin Estimate uses 6 recent nearby sales, priced between $752K to $1.8M.