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Single Family ResidenceResidential
$424,184$193 / 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
Last sold for $400,000 on Jul 21, 2025

23 PROSPECT ST

SOMERSWORTH, NH 03878
3
Beds
1.5
Baths
2,196 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.
1856
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.

Valuation

$424K
$379K low$469K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$400,000 · Jul 21, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,101 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$433,200 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$72,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$360,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$349,410

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySTRAFFORD
Lot (acres)The size of the land the home sits on, from county records.0.24
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.Steam
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(2)

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
Somersworth High SchoolD-
High · Grades 9–12 · 0.7 mi
M
Somersworth Middle SchoolD-
Middle · Grades 6–8 · 0.7 mi
E
Idlehurst Elementary SchoolD
Elementary · Grades PK–2 · 1.7 mi

District: Somersworth School District

Neighborhood · ZIP 03878These 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.104
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 100.103

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.12,493
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,227 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,179
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$100,561
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.46 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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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

23 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 less than 73% of homes in Somersworth 03878
  • Costs less per square foot than 96% of homes in Strafford County
  • Bigger than 78% of homes in Somersworth 03878
  • Has a smaller lot than 82% of homes in Strafford County
  • Older than 97% of homes in Somersworth 03878

What homes are worth in Somersworth 03878

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

This home
$277K$741K

This home is worth more than 27% of homes in Somersworth 03878.

How it measures up in Somersworth 03878

The dot is this home. The mark in the middle is the typical home in Somersworth 03878.

Estimated value$424,184
CheaperTypical $479,184Pricier

Pricier than 27% of homes nearby

Price per ft²$193
CheaperTypical $301Pricier

Pricier than 5% of homes nearby

Living area2,196 ft²
SmallerTypical 1,601 ft²Bigger

Bigger than 78% of homes nearby

Lot size0.24 ac
SmallerTypical 0.34 acBigger

Bigger than 34% of homes nearby

Year built1856
OlderTypical 1970Newer

Newer than 3% of homes nearby

How 23 Prospect St ranks against every home in each area.
MeasureThis homeSomersworth 03878Strafford County
Estimated valuepricier than$424,18427% of homes29% of homes
Price per ft²pricier than$1935% of homes4% of homes
Living areabigger than2,196 ft²78% of homes74% of homes
Lot sizebigger than0.24 ac34% of homes18% of homes
Year builtnewer than18563% of homes4% of homes

About 23 Prospect St

How much is 23 Prospect St, Somersworth, NH worth?

The TopHap Estimate for 23 Prospect St, Somersworth, NH is $424,184 as of Oct 21, 2026. The likely range is $379,240 to $469,128. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 23 Prospect St, Somersworth, NH last sell?

23 Prospect St, Somersworth, NH last sold on Jul 21, 2025 for $400,000, according to the county's recorded deed.

How big is 23 Prospect St, Somersworth, NH?

23 Prospect St, Somersworth, NH has 3 bedrooms, 1.5 bathrooms, 2,196 square feet of living space and a 0.24-acre lot.

When was 23 Prospect St, Somersworth, NH built?

23 Prospect St, Somersworth, NH was built in 1856, making it 170 years old. The building has 2 stories.

What schools serve 23 Prospect St, Somersworth, NH?

23 Prospect St, Somersworth, NH is assigned to Somersworth High School (high), rated D-; Somersworth Middle School (middle), rated D-; Idlehurst Elementary School (elementary), rated D. All sit in Somersworth School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 23 Prospect St, Somersworth, NH compare to other homes in Somersworth 03878?

Among the 3,660 homes in Somersworth 03878, it is worth more than 27% of them ($424,184 against a typical $479,184), its price per square foot is higher than 5% of them ($193 against a typical $301), it is bigger than 78% of them (2,196 ft² against a typical 1,601 ft²), its lot is bigger than 34% of them (0.24 ac against a typical 0.34 ac) and it is newer than 3% of them (1856 against a typical 1970). Measured against all of Strafford County, it is worth more than 29% 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 23 Prospect St, Somersworth, NH?

The 2024 property tax bill for 23 Prospect St, Somersworth, NH was $8,101. The county assessed it at $433,200.

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