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Single Family ResidenceResidential
$1,010,267$279 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $460,751 on Apr 21, 1999

50 PROSPECT ST

ACTON, MA 01720
5
Beds
3.5
Baths
3,616 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.
1.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1999
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1M
$936K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$460,751 · Apr 21, 1999
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$516,667
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$413,334
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.50%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$368,600
BANK OF AMERICA · recorded Apr 21, 1999
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$100,000
UMASS FIVE COLLEGE FCU
3rd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$25,000

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$19,896 (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.$1,160,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$294,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$865,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,236,330

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.38
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
6
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
59
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
95
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
33
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.1.22
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

Transaction History(7)

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
R. J. Grey Junior High SchoolA
Middle · Grades 7–8 · 0.7 mi
E
Merriam Elementary SchoolB
Elementary · Grades KG–6 · 0.7 mi
H
Acton - Boxborough Regional High SchoolA
High · Grades 9–12 · 0.9 mi

District: Acton-Boxborough School District

Neighborhood · ZIP 01720These 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.71
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.72

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.6%
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.24,473
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,210 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$148,952
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$187,397
Average tempThe average temperature here across a full year.48°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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

50 Prospect 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 more than 70% of homes in Middlesex County
  • Costs less per square foot than 98% of homes in Acton 01720
  • Bigger than 94% of homes in Acton 01720
  • Has a bigger lot than 84% of homes in Middlesex County
  • Newer than 88% of homes in Middlesex County

What homes are worth in Acton 01720

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

This home
$234K$1.7M

This home is worth more than 68% of homes in Acton 01720.

How it measures up in Acton 01720

The dot is this home. The mark in the middle is the typical home in Acton 01720.

Estimated value$1,010,267
CheaperTypical $866,551Pricier

Pricier than 68% of homes nearby

Price per ft²$279
CheaperTypical $417Pricier

Pricier than 2% of homes nearby

Living area3,616 ft²
SmallerTypical 2,086 ft²Bigger

Bigger than 94% of homes nearby

Lot size1.21 ac
SmallerTypical 0.71 acBigger

Bigger than 67% of homes nearby

Year built1999
OlderTypical 1971Newer

Newer than 83% of homes nearby

How 50 Prospect St ranks against every home in each area.
MeasureThis homeActon 01720Middlesex County
Estimated valuepricier than$1,010,26768% of homes70% of homes
Price per ft²pricier than$2792% of homes5% of homes
Living areabigger than3,616 ft²94% of homes92% of homes
Lot sizebigger than1.21 ac67% of homes84% of homes
Year builtnewer than199983% of homes88% of homes

About 50 Prospect St

How much is 50 Prospect St, Acton, MA worth?

The TopHap Estimate for 50 Prospect St, Acton, MA is $1,010,267 as of Jul 14, 2026. The likely range is $935,892 to $1,084,642. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 50 Prospect St, Acton, MA last sell?

50 Prospect St, Acton, MA last sold on Apr 21, 1999 for $460,751, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 50 Prospect St, Acton, MA?

50 Prospect St, Acton, MA has 5 bedrooms, 3.5 bathrooms, 3,616 square feet of living space and a 1.22-acre lot.

When was 50 Prospect St, Acton, MA built?

50 Prospect St, Acton, MA was built in 1999, making it 27 years old. It is a cape cod home. The building has 2 stories.

What schools serve 50 Prospect St, Acton, MA?

50 Prospect St, Acton, MA is assigned to R. J. Grey Junior High School (middle), rated A; Merriam Elementary School (elementary), rated B; Acton - Boxborough Regional High School (high), rated A. All sit in Acton-Boxborough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 50 Prospect St, Acton, MA compare to other homes in Acton 01720?

Among the 7,508 homes in Acton 01720, it is worth more than 68% of them ($1,010,267 against a typical $866,551), its price per square foot is higher than 2% of them ($279 against a typical $417), it is bigger than 94% of them (3,616 ft² against a typical 2,086 ft²), its lot is bigger than 67% of them (1.21 ac against a typical 0.71 ac) and it is newer than 83% of them (1999 against a typical 1971). Measured against all of Middlesex County, it is worth more than 70% 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 50 Prospect St, Acton, MA?

The 2025 property tax bill for 50 Prospect St, Acton, MA was $19,896. The county assessed it at $1,160,100.

Closest homes

More homes in Acton 01720

Assigned schools

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