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CondominiumResidential
$363,924$333 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 90How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $375,000 on May 17, 2024

511 MAIN ST

GROTON, MA 01450
Building report
2
Beds
2
Baths
1,092 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
5.31 ac
Lot SizeThe size of the land the home sits on, from county records.
2006
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$364K
$327K low$401K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$375,000 · May 17, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,817 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$315,900 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$315,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$349,600

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.43
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
28
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
58
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
93
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
39
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyMIDDLESEX
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

Transaction History(3)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Groton - Dunstable Regional Middle SchoolA-
Middle · Grades 5–8 · 0.5 mi
E
Florence Roche Elementary SchoolA-
Elementary · Grades KG–4 · 0.7 mi
H
Groton - Dunstable Regional High SchoolA
High · Grades 9–12 · 3.1 mi

District: Groton-Dunstable School District

Neighborhood · ZIP 01450These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.73
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.97
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.77

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.11,438
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.343 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$170,664
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$181,425
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

511 Main St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 96% of homes in Groton 01450
  • Costs less per square foot than 85% of homes in Middlesex County
  • Smaller than 92% of homes in Groton 01450
  • Has a bigger lot than 94% of homes in Middlesex County
  • Newer than 93% of homes in Middlesex County

What homes are worth in Groton 01450

Each bar is how many homes fall in that price range. The marker is this home.

This home
$301K$1.4M

This home is worth more than 4% of homes in Groton 01450.

How it measures up in Groton 01450

The dot is this home. The mark in the middle is the typical home in Groton 01450.

Estimated value$363,924
CheaperTypical $752,395Pricier

Pricier than 4% of homes nearby

Price per ft²$333
CheaperTypical $337Pricier

Pricier than 47% of homes nearby

Living area1,092 ft²
SmallerTypical 2,272 ft²Bigger

Bigger than 8% of homes nearby

Lot size5.31 ac
SmallerTypical 1.28 acBigger

Bigger than 91% of homes nearby

Year built2006
OlderTypical 1985Newer

Newer than 88% of homes nearby

How 511 Main St ranks against every home in each area.
MeasureThis homeGroton 01450Middlesex County
Estimated valuepricier than$363,9244% of homes5% of homes
Price per ft²pricier than$33347% of homes15% of homes
Living areabigger than1,092 ft²8% of homes15% of homes
Lot sizebigger than5.31 ac91% of homes94% of homes
Year builtnewer than200688% of homes93% of homes

About 511 Main St

How much is 511 Main St, Groton, MA worth?

The TopHap Estimate for 511 Main St, Groton, MA is $363,924 as of Sep 24, 2026. The likely range is $327,188 to $400,660. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 511 Main St, Groton, MA last sell?

511 Main St, Groton, MA last sold on May 17, 2024 for $375,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 511 Main St, Groton, MA?

511 Main St, Groton, MA has 2 bedrooms, 2 bathrooms and 1,092 square feet of living space.

When was 511 Main St, Groton, MA built?

511 Main St, Groton, MA was built in 2006, making it 20 years old. It is a condo/apartment home. The building has 1 story.

What schools serve 511 Main St, Groton, MA?

511 Main St, Groton, MA is assigned to Groton - Dunstable Regional Middle School (middle), rated A-; Florence Roche Elementary School (elementary), rated A-; Groton - Dunstable Regional High School (high), rated A. All sit in Groton-Dunstable School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 511 Main St, Groton, MA compare to other homes in Groton 01450?

Among the 3,834 homes in Groton 01450, it is worth more than 4% of them ($363,924 against a typical $752,395), its price per square foot is higher than 47% of them ($333 against a typical $337), it is bigger than 8% of them (1,092 ft² against a typical 2,272 ft²), its lot is bigger than 91% of them (5.31 ac against a typical 1.28 ac) and it is newer than 88% of them (2006 against a typical 1985). Measured against all of Middlesex County, it is worth more than 5% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 511 Main St, Groton, MA?

The 2025 property tax bill for 511 Main St, Groton, MA was $4,817. The county assessed it at $315,900.

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