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Single Family ResidenceResidential
$425,449$591 / 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 87How 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
Last sold for $225,000 on May 3, 2004

1 PROSPECT AVE

ONSET, MA 02558
2
Beds
1
Baths
720 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.
2,880 ft²
Lot SizeThe size of the land the home sits on, from county records.
1935
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$425K
$371K low$480K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$225,000 · May 3, 2004

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,752 (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.$341,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$171,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$170,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$434,815

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.52
99
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
0
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
45
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
91
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
29
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.62%
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.Bungalow
CountyPLYMOUTH
Lot (acres)The size of the land the home sits on, from county records.0.07
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
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
Wareham High SchoolD+
High · Grades 9–12 · 3.2 mi
M
Wareham Middle SchoolB-
Middle · Grades 5–8 · 3.4 mi
E
John W. Decas Elementary
Elementary · Grades KG–2 · 4.9 mi

District: Wareham School District

Neighborhood · ZIP 02558These 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.191
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.59

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.67%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.88
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,267 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,803
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$110,781
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

1 Prospect Ave 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 less than 89% of homes in Plymouth County
  • Costs more per square foot than 90% of homes in Plymouth County
  • Smaller than 97% of homes in Plymouth County
  • Among the smallest lots in Plymouth County
  • Older than 79% of homes in Plymouth County

What homes are worth in Onset 02558

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

This home
$230K$1.3M

This home is worth more than 45% of homes in Onset 02558.

How it measures up in Onset 02558

The dot is this home. The mark in the middle is the typical home in Onset 02558.

Estimated value$425,449
CheaperTypical $433,790Pricier

Pricier than 45% of homes nearby

Price per ft²$591
CheaperTypical $420Pricier

Pricier than 89% of homes nearby

Living area720 ft²
SmallerTypical 1,125 ft²Bigger

Bigger than 14% of homes nearby

Lot size2,880 ft²
SmallerTypical 4,312 ft²Bigger

Bigger than 14% of homes nearby

Year built1935
OlderTypical 1930Newer

Newer than 62% of homes nearby

How 1 Prospect Ave ranks against every home in each area.
MeasureThis homeOnset 02558Plymouth County
Estimated valuepricier than$425,44945% of homes11% of homes
Price per ft²pricier than$59189% of homes90% of homes
Living areabigger than720 ft²14% of homes3% of homes
Lot sizebigger than2,880 ft²14% of homesalmost no homes
Year builtnewer than193562% of homes21% of homes

About 1 Prospect Ave

How much is 1 Prospect Ave, Onset, MA worth?

The TopHap Estimate for 1 Prospect Ave, Onset, MA is $425,449 as of Aug 30, 2026. The likely range is $370,806 to $480,092. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1 Prospect Ave, Onset, MA last sell?

1 Prospect Ave, Onset, MA last sold on May 3, 2004 for $225,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 1 Prospect Ave, Onset, MA?

1 Prospect Ave, Onset, MA has 2 bedrooms, 1 bathrooms, 720 square feet of living space and a 0.07-acre lot.

When was 1 Prospect Ave, Onset, MA built?

1 Prospect Ave, Onset, MA was built in 1935, making it 91 years old. It is a bungalow home. The building has 1 story.

What schools serve 1 Prospect Ave, Onset, MA?

1 Prospect Ave, Onset, MA is assigned to Wareham High School (high), rated D+; Wareham Middle School (middle), rated B-; John W. Decas Elementary (elementary). All sit in Wareham School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1 Prospect Ave, Onset, MA compare to other homes in Onset 02558?

Among the 273 homes in Onset 02558, it is worth more than 45% of them ($425,449 against a typical $433,790), its price per square foot is higher than 89% of them ($591 against a typical $420), it is bigger than 14% of them (720 ft² against a typical 1,125 ft²), its lot is bigger than 14% of them (2,880 ft² against a typical 4,312 ft²) and it is newer than 62% of them (1935 against a typical 1930). Measured against all of Plymouth County, it is worth more than 11% 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 1 Prospect Ave, Onset, MA?

The 2025 property tax bill for 1 Prospect Ave, Onset, MA was $3,752. The county assessed it at $341,700.

Closest homes

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Assigned schools

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