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Single Family ResidenceResidential
$2,559,366$773 / 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 94How 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
Last sold for $900,000 on Feb 18, 2022

121 SEA ST

DENNIS PORT, MA 02639
3
Beds
3
Baths
3,312 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.
0.65 ac
Lot SizeThe size of the land the home sits on, from county records.
2022
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$2.6M
$2.4M low$2.7M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$900,000 · Feb 18, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,386 (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.$2,167,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$571,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,596,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,751,515

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.24 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.45%
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.Cape Cod
CountyBARNSTABLE
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.2023
Lot (acres)The size of the land the home sits on, from county records.0.65
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.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

Transaction History(4)

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
Mattacheese Middle SchoolC-
Middle · Grades 6–8 · 5.4 mi
E
Ezra H. Baker Innovation SchoolB-
Elementary · Grades PK–3 · 5.6 mi
H
Dennis Yarmouth Regional High SchoolD+
High · Grades 9–12 · 5.6 mi

District: Dennis-Yarmouth School District

Neighborhood · ZIP 02639These 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.182
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.46

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.37%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
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.3,359
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,086 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$59,475
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$84,740
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.45 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

121 Sea 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.

  • Among the most valuable homes in Dennis Port 02639
  • Costs more per square foot than 85% of homes in Dennis Port 02639
  • Among the largest homes in Dennis Port 02639
  • Has a bigger lot than 94% of homes in Dennis Port 02639
  • Among the newest homes in Dennis Port 02639

What homes are worth in Dennis Port 02639

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

This home
$150K$1.4M

This home is worth more than almost all homes in Dennis Port 02639.

How it measures up in Dennis Port 02639

The dot is this home. The mark in the middle is the typical home in Dennis Port 02639.

Estimated value$2,559,366
CheaperTypical $552,243Pricier

Pricier than almost all homes nearby

Price per ft²$773
CheaperTypical $589Pricier

Pricier than 85% of homes nearby

Living area3,312 ft²
SmallerTypical 958 ft²Bigger

Bigger than almost all homes nearby

Lot size0.65 ac
SmallerTypical 0.18 acBigger

Bigger than 94% of homes nearby

Year built2022
OlderTypical 1960Newer

Newer than almost all homes nearby

How 121 Sea St ranks against every home in each area.
MeasureThis homeDennis Port 02639Barnstable County
Estimated valuepricier than$2,559,366almost all homes96% of homes
Price per ft²pricier than$77385% of homes84% of homes
Living areabigger than3,312 ft²almost all homes94% of homes
Lot sizebigger than0.65 ac94% of homes73% of homes
Year builtnewer than2022almost all homesalmost all homes

About 121 Sea St

How much is 121 Sea St, Dennis Port, MA worth?

The TopHap Estimate for 121 Sea St, Dennis Port, MA is $2,559,366 as of Oct 21, 2026. The likely range is $2,403,052 to $2,715,680. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 121 Sea St, Dennis Port, MA last sell?

121 Sea St, Dennis Port, MA last sold on Feb 18, 2022 for $900,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 121 Sea St, Dennis Port, MA?

121 Sea St, Dennis Port, MA has 3 bedrooms, 3 bathrooms, 3,312 square feet of living space and a 0.65-acre lot.

When was 121 Sea St, Dennis Port, MA built?

121 Sea St, Dennis Port, MA was built in 2022, making it 4 years old. It is a cape cod home. The building has 2 stories.

What schools serve 121 Sea St, Dennis Port, MA?

121 Sea St, Dennis Port, MA is assigned to Mattacheese Middle School (middle), rated C-; Ezra H. Baker Innovation School (elementary), rated B-; Dennis Yarmouth Regional High School (high), rated D+. All sit in Dennis-Yarmouth School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 121 Sea St, Dennis Port, MA compare to other homes in Dennis Port 02639?

Among the 4,259 homes in Dennis Port 02639, it is worth more than almost all of them ($2,559,366 against a typical $552,243), its price per square foot is higher than 85% of them ($773 against a typical $589), it is bigger than almost all of them (3,312 ft² against a typical 958 ft²), its lot is bigger than 94% of them (0.65 ac against a typical 0.18 ac) and it is newer than almost all of them (2022 against a typical 1960). Measured against all of Barnstable County, it is worth more than 96% 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 121 Sea St, Dennis Port, MA?

The 2025 property tax bill for 121 Sea St, Dennis Port, MA was $9,386. The county assessed it at $2,167,700.

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