Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,167,476$449 / 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 95How 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 $985,000 on Nov 19, 2021

21 PROSPECT ST

SHERBORN, MA 01770
4
Beds
2.5
Baths
2,602 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.
1.02 ac
Lot SizeThe size of the land the home sits on, from county records.
1951
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.2M
$1.1M low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$985,000 · Nov 19, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,008 (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.$965,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$442,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$523,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,193,675

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.31 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.Colonial
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.1.02
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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.

E
Pine HillA
Elementary · Grades PK–5 · 1.0 mi
M
Dover-Sherborn Middle SchoolA-
Middle · Grades 6–8 · 3.9 mi
H
Dover-Sherborn High SchoolA+
High · Grades 9–12 · 3.9 mi

District: Dover-Sherborn School District

Neighborhood · ZIP 01770These 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.30
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 100.70

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.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.4,823
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.296 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$201,223
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$271,124
Average tempThe average temperature here across a full year.49°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

21 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 78% of homes in Middlesex County
  • Bigger than 77% of homes in Middlesex County
  • Has a smaller lot than 90% of homes in Sherborn 01770
  • Older than 84% of homes in Sherborn 01770

What homes are worth in Sherborn 01770

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

This home
$552K$3M

This home is worth more than 42% of homes in Sherborn 01770.

How it measures up in Sherborn 01770

The dot is this home. The mark in the middle is the typical home in Sherborn 01770.

Estimated value$1,167,476
CheaperTypical $1,254,305Pricier

Pricier than 42% of homes nearby

Price per ft²$449
CheaperTypical $426Pricier

Pricier than 62% of homes nearby

Living area2,602 ft²
SmallerTypical 2,965 ft²Bigger

Bigger than 39% of homes nearby

Lot size1.02 ac
SmallerTypical 2.2 acBigger

Bigger than 10% of homes nearby

Year built1951
OlderTypical 1970Newer

Newer than 16% of homes nearby

How 21 Prospect St ranks against every home in each area.
MeasureThis homeSherborn 01770Middlesex County
Estimated valuepricier than$1,167,47642% of homes78% of homes
Price per ft²pricier than$44962% of homes47% of homes
Living areabigger than2,602 ft²39% of homes77% of homes
Lot sizebigger than1.02 ac10% of homes80% of homes
Year builtnewer than195116% of homes42% of homes

About 21 Prospect St

How much is 21 Prospect St, Sherborn, MA worth?

The TopHap Estimate for 21 Prospect St, Sherborn, MA is $1,167,476 as of Jul 14, 2026. The likely range is $1,105,752 to $1,229,200. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Prospect St, Sherborn, MA last sell?

21 Prospect St, Sherborn, MA last sold on Nov 19, 2021 for $985,000, according to the county's recorded deed.

How big is 21 Prospect St, Sherborn, MA?

21 Prospect St, Sherborn, MA has 4 bedrooms, 2.5 bathrooms, 2,602 square feet of living space and a 1.02-acre lot.

When was 21 Prospect St, Sherborn, MA built?

21 Prospect St, Sherborn, MA was built in 1951, making it 75 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Prospect St, Sherborn, MA?

21 Prospect St, Sherborn, MA is assigned to Pine Hill (elementary), rated A; Dover-Sherborn Middle School (middle), rated A-; Dover-Sherborn High School (high), rated A+. All sit in Dover-Sherborn School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Prospect St, Sherborn, MA compare to other homes in Sherborn 01770?

Among the 1,542 homes in Sherborn 01770, it is worth more than 42% of them ($1,167,476 against a typical $1,254,305), its price per square foot is higher than 62% of them ($449 against a typical $426), it is bigger than 39% of them (2,602 ft² against a typical 2,965 ft²), its lot is bigger than 10% of them (1.02 ac against a typical 2.2 ac) and it is newer than 16% of them (1951 against a typical 1970). Measured against all of Middlesex County, it is worth more than 78% 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 21 Prospect St, Sherborn, MA?

The 2025 property tax bill for 21 Prospect St, Sherborn, MA was $16,008. The county assessed it at $965,500.

More homes on Prospect St

Closest homes

More homes in Sherborn 01770

Assigned schools

Explore the area

See this home in context

Open 21 Prospect 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