Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$784,800$284 / 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 Jul 14, 2026

421 FOREST ST

DUNSTABLE, MA 01827
4
Beds
2.5
Baths
2,760 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.
4.89 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$785K
$633K low$937K high
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.$584,800
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$467,840
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.27%
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.$200,000
JEAN DARC CU · recorded Sep 29, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,507 (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.$691,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$247,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$444,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$624,340

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.Colonial
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.4.89
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
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.

H
Groton - Dunstable Regional High SchoolA
High · Grades 9–12 · 4.0 mi
E
Florence Roche Elementary SchoolA
Elementary · Grades KG–4 · 6.8 mi
M
Groton - Dunstable Regional Middle SchoolB+
Middle · Grades 5–8 · 6.8 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%

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

421 Forest 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.

  • Costs less per square foot than 94% of homes in Middlesex County
  • Bigger than 81% of homes in Middlesex County
  • Has a bigger lot than 94% of homes in Middlesex County
  • Newer than 79% of homes in Middlesex County

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
$431K$1.4M

This home is worth more than 56% 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$784,800
CheaperTypical $747,958Pricier

Pricier than 56% of homes nearby

Price per ft²$284
CheaperTypical $297Pricier

Pricier than 38% of homes nearby

Living area2,760 ft²
SmallerTypical 2,576 ft²Bigger

Bigger than 60% of homes nearby

Lot size4.89 ac
SmallerTypical 2.04 acBigger

Bigger than 85% of homes nearby

Year built1987
OlderTypical 1987Newer

Newer than 52% of homes nearby

How 421 Forest St ranks against every home in each area.
MeasureThis homeDunstable 01827Middlesex County
Estimated valuepricier than$784,80056% of homes50% of homes
Price per ft²pricier than$28438% of homes6% of homes
Living areabigger than2,760 ft²60% of homes81% of homes
Lot sizebigger than4.89 ac85% of homes94% of homes
Year builtnewer than198752% of homes79% of homes

About 421 Forest St

How much is 421 Forest St, Dunstable, MA worth?

The TopHap Estimate for 421 Forest St, Dunstable, MA is $784,800 as of Jul 14, 2026. The likely range is $632,688 to $936,912. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Forest St, Dunstable, MA last sell?

421 Forest St, Dunstable, MA last sold on Jan 1, 1900, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 421 Forest St, Dunstable, MA?

421 Forest St, Dunstable, MA has 4 bedrooms, 2.5 bathrooms, 2,760 square feet of living space and a 4.89-acre lot.

When was 421 Forest St, Dunstable, MA built?

421 Forest St, Dunstable, MA was built in 1987, making it 39 years old. It is a colonial home. The building has 2 stories.

What schools serve 421 Forest St, Dunstable, MA?

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

How does 421 Forest St, Dunstable, MA compare to other homes in Dunstable 01827?

Among the 1,159 homes in Dunstable 01827, it is worth more than 56% of them ($784,800 against a typical $747,958), its price per square foot is higher than 38% of them ($284 against a typical $297), it is bigger than 60% of them (2,760 ft² against a typical 2,576 ft²), its lot is bigger than 85% of them (4.89 ac against a typical 2.04 ac) and it is newer than 52% of them (1987 against a typical 1987). Measured against all of Middlesex County, it is worth more than 50% 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 421 Forest St, Dunstable, MA?

The 2025 property tax bill for 421 Forest St, Dunstable, MA was $9,507. The county assessed it at $691,400.

Closest homes

More homes in Dunstable 01827

Assigned schools

Explore the area

See this home in context

Open 421 Forest 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