Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$949,663$489 / 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 81How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

255 RIVER ST

DUNSTABLE, MA 01827
3 / 1
Baths
1,943 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.
5.16 ac
Lot SizeThe size of the land the home sits on, from county records.
2023
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$950K
$769K low$1.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,574 (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.$769,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$242,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$526,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$231,300

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.
30
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
55
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
94
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.

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.5.16
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes

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

H
Groton - Dunstable Regional High SchoolA
High · Grades 9–12 · 2.5 mi
M
Groton - Dunstable Regional Middle SchoolB+
Middle · Grades 5–8 · 5.0 mi
E
Florence Roche Elementary SchoolA
Elementary · Grades KG–4 · 5.1 mi

District: Groton-Dunstable School District

Neighborhood · ZIP 01827These 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.17
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.98
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.76

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.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.3,358
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.202 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$176,482
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$191,924
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%

Owner Tools

Do you own this home?
Claim this home

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

255 River 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 85% of homes in Dunstable 01827
  • Costs more per square foot than 96% of homes in Dunstable 01827
  • Smaller than 79% of homes in Dunstable 01827
  • Has a bigger lot than 94% of homes in Middlesex County
  • Among the newest homes in Dunstable 01827

What homes are worth in Dunstable 01827

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

This home
$443K$1.4M

This home is worth more than 85% of homes in Dunstable 01827.

How it measures up in Dunstable 01827

The dot is this home. The mark in the middle is the typical home in Dunstable 01827.

Estimated value$949,663
CheaperTypical $731,032Pricier

Pricier than 85% of homes nearby

Price per ft²$489
CheaperTypical $292Pricier

Pricier than 96% of homes nearby

Living area1,943 ft²
SmallerTypical 2,582 ft²Bigger

Bigger than 21% of homes nearby

Lot size5.16 ac
SmallerTypical 2.04 acBigger

Bigger than 86% of homes nearby

Year built2023
OlderTypical 1987Newer

Newer than almost all homes nearby

How 255 River St ranks against every home in each area.
MeasureThis homeDunstable 01827Middlesex County
Estimated valuepricier than$949,66385% of homes66% of homes
Price per ft²pricier than$48996% of homes56% of homes
Living areabigger than1,943 ft²21% of homes54% of homes
Lot sizebigger than5.16 ac86% of homes94% of homes
Year builtnewer than2023almost all homesalmost all homes

About 255 River St

How much is 255 River St, Dunstable, MA worth?

The TopHap Estimate for 255 River St, Dunstable, MA is $949,663 as of Aug 30, 2026. The likely range is $769,249 to $1,130,077. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 255 River St, Dunstable, MA?

255 River St, Dunstable, MA has 3 bathrooms, 1,943 square feet of living space and a 5.16-acre lot.

When was 255 River St, Dunstable, MA built?

255 River St, Dunstable, MA was built in 2023, making it 3 years old. It is a cape cod home. The building has 2 stories.

What schools serve 255 River St, Dunstable, MA?

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

How does 255 River St, Dunstable, MA compare to other homes in Dunstable 01827?

Among the 1,159 homes in Dunstable 01827, it is worth more than 85% of them ($949,663 against a typical $731,032), its price per square foot is higher than 96% of them ($489 against a typical $292), it is bigger than 21% of them (1,943 ft² against a typical 2,582 ft²), its lot is bigger than 86% of them (5.16 ac against a typical 2.04 ac) and it is newer than almost all of them (2023 against a typical 1987). Measured against all of Middlesex County, it is worth more than 66% 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 255 River St, Dunstable, MA?

The 2025 property tax bill for 255 River St, Dunstable, MA was $10,574. The county assessed it at $769,000.

More homes on River St

Closest homes

More homes in Dunstable 01827

Assigned schools

Explore the area

See this home in context

Open 255 River St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map