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Single Family ResidenceResidential
$1,444,304$470 / 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 89How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

21 WATER ST

MATTAPOISETT, MA 02739
4
Beds
2
Baths
3,072 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.
0.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1816
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.4M
$1.3M low$1.6M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,710 (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.$1,274,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$633,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$640,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,467,560

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.56 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.60%
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.1 percent flood zone

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.Historical
CountyPLYMOUTH
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1970
Lot (acres)The size of the land the home sits on, from county records.0.24
RoofThe main material covering the roof, such as asphalt shingle or tile.Shingle
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

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

E
CenterB+
Elementary · Grades PK–3 · 0.2 mi
M
Old Rochester Regional Jr High SchoolB
Middle · Grades 7–8 · 2.0 mi
H
Old Rochester Regional High SchoolB
High · Grades 9–12 · 2.0 mi

District: Old Rochester School District

Neighborhood · ZIP 02739These 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.115
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.56

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.84%
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.2.7%
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.5,594
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.287 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$114,027
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$153,153
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.52%

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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

21 Water 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 94% of homes in Plymouth County
  • Costs more per square foot than 73% of homes in Plymouth County
  • Bigger than 90% of homes in Plymouth County
  • Has a smaller lot than 77% of homes in Mattapoisett 02739
  • Among the oldest homes in Mattapoisett 02739

What homes are worth in Mattapoisett 02739

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

This home
$400K$2.3M

This home is worth more than 90% of homes in Mattapoisett 02739.

How it measures up in Mattapoisett 02739

The dot is this home. The mark in the middle is the typical home in Mattapoisett 02739.

Estimated value$1,444,304
CheaperTypical $785,016Pricier

Pricier than 90% of homes nearby

Price per ft²$470
CheaperTypical $428Pricier

Pricier than 62% of homes nearby

Living area3,072 ft²
SmallerTypical 1,849 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.24 ac
SmallerTypical 0.46 acBigger

Bigger than 23% of homes nearby

Year built1816
OlderTypical 1970Newer

Older than almost all homes nearby

How 21 Water St ranks against every home in each area.
MeasureThis homeMattapoisett 02739Plymouth County
Estimated valuepricier than$1,444,30490% of homes94% of homes
Price per ft²pricier than$47062% of homes73% of homes
Living areabigger than3,072 ft²88% of homes90% of homes
Lot sizebigger than0.24 ac23% of homes27% of homes
Year builtnewer than1816almost no homesalmost no homes

About 21 Water St

How much is 21 Water St, Mattapoisett, MA worth?

The TopHap Estimate for 21 Water St, Mattapoisett, MA is $1,444,304 as of Oct 21, 2026. The likely range is $1,291,813 to $1,596,795. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Water St, Mattapoisett, MA last sell?

21 Water St, Mattapoisett, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Water St, Mattapoisett, MA?

21 Water St, Mattapoisett, MA has 4 bedrooms, 2 bathrooms, 3,072 square feet of living space and a 0.24-acre lot.

When was 21 Water St, Mattapoisett, MA built?

21 Water St, Mattapoisett, MA was built in 1816, making it 210 years old. It is a historical home. The building has 3 stories.

What schools serve 21 Water St, Mattapoisett, MA?

21 Water St, Mattapoisett, MA is assigned to Center (elementary), rated B+; Old Rochester Regional Jr High School (middle), rated B; Old Rochester Regional High School (high), rated B. All sit in Old Rochester School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Water St, Mattapoisett, MA compare to other homes in Mattapoisett 02739?

Among the 3,361 homes in Mattapoisett 02739, it is worth more than 90% of them ($1,444,304 against a typical $785,016), its price per square foot is higher than 62% of them ($470 against a typical $428), it is bigger than 88% of them (3,072 ft² against a typical 1,849 ft²), its lot is bigger than 23% of them (0.24 ac against a typical 0.46 ac) and it is newer than almost none of them (1816 against a typical 1970). Measured against all of Plymouth County, it is worth more than 94% 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 Water St, Mattapoisett, MA?

The 2025 property tax bill for 21 Water St, Mattapoisett, MA was $13,710. The county assessed it at $1,274,200.

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