Skip to content
Skip to content
TopHapOpen in map
Duplex (2 Units, Any Combination)Residential

21 PROSPECT ST

PORTSMOUTH, NH 03801
5
Beds
2.5
Baths
2,679 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1810
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,134 (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.$793,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$335,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$457,700

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
CountyROCKINGHAM
Lot (acres)The size of the land the home sits on, from county records.0.12
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
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.DeckGreenhouse

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

E
New Franklin Elementary SchoolA
Elementary · Grades KG–5 · 0.5 mi
M
Portsmouth Middle SchoolB
Middle · Grades 6–8 · 0.7 mi
H
Portsmouth High SchoolA+
High · Grades 9–12 · 1.4 mi

District: Portsmouth School District

Neighborhood · ZIP 03801These 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.138
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.98

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.41%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.24,014
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.808 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$107,161
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$136,932
Average tempThe average temperature here across a full year.48°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.54%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.Yes

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.

  • Bigger than 90% of homes in Christian Shore / Creek
  • Has a smaller lot than 91% of homes in Rockingham County
  • Older than 98% of homes in Portsmouth 03801

How it measures up in Portsmouth 03801

The dot is this home. The mark in the middle is the typical home in Portsmouth 03801.

Living area2,679 ft²
SmallerTypical 1,518 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.12 ac
SmallerTypical 0.22 acBigger

Bigger than 19% of homes nearby

Year built1810
OlderTypical 1962Newer

Newer than 2% of homes nearby

How 21 Prospect St ranks against every home in each area.
MeasureThis homeChristian Shore / CreekPortsmouth 03801Rockingham County
Living areabigger than2,679 ft²90% of homes88% of homes80% of homes
Lot sizebigger than0.12 ac29% of homes19% of homes9% of homes
Year builtnewer than18104% of homes2% of homes2% of homes

About 21 Prospect St

When did 21 Prospect St, Portsmouth, NH last sell?

21 Prospect St, Portsmouth, NH last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Prospect St, Portsmouth, NH?

21 Prospect St, Portsmouth, NH has 5 bedrooms, 2.5 bathrooms, 2,679 square feet of living space and a 0.12-acre lot.

When was 21 Prospect St, Portsmouth, NH built?

21 Prospect St, Portsmouth, NH was built in 1810, making it 216 years old. The building has 2 stories.

What schools serve 21 Prospect St, Portsmouth, NH?

21 Prospect St, Portsmouth, NH is assigned to New Franklin Elementary School (elementary), rated A; Portsmouth Middle School (middle), rated B; Portsmouth High School (high), rated A+. All sit in Portsmouth School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Prospect St, Portsmouth, NH compare to other homes in Portsmouth 03801?

Among the 8,130 homes in Portsmouth 03801, it is bigger than 88% of them (2,679 ft² against a typical 1,518 ft²), its lot is bigger than 19% of them (0.12 ac against a typical 0.22 ac) and it is newer than 2% of them (1810 against a typical 1962). 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, Portsmouth, NH?

The 2025 property tax bill for 21 Prospect St, Portsmouth, NH was $9,134. The county assessed it at $793,600.

Closest homes

More homes in Portsmouth 03801

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