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Duplex (2 Units, Any Combination)Residential
Last sold for $162,000 on Jun 24, 1997

20 UNION ST

PORTSMOUTH, NH 03801
4
Beds
2
Baths
1,944 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.
2,614 ft²
Lot SizeThe size of the land the home sits on, from county records.
1895
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

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$162,000 · Jun 24, 1997

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,745 (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.$759,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$446,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$313,400

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.0.06
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
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

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

M
Portsmouth Middle SchoolB
Middle · Grades 6–8 · 0.4 mi
E
Little Harbour Elementary SchoolA
Elementary · Grades KG–5 · 0.8 mi
H
Portsmouth High SchoolA+
High · Grades 9–12 · 0.9 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%

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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

20 Union 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 69% of homes in Portsmouth 03801
  • Has a smaller lot than 95% of homes in Rockingham County
  • Older than 95% of homes in Rockingham County

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 area1,944 ft²
SmallerTypical 1,526 ft²Bigger

Bigger than 69% of homes nearby

Lot size2,614 ft²
SmallerTypical 0.22 acBigger

Bigger than 8% of homes nearby

Year built1895
OlderTypical 1963Newer

Newer than 14% of homes nearby

How 20 Union St ranks against every home in each area.
MeasureThis homeGoodwin ParkPortsmouth 03801Rockingham County
Living areabigger than1,944 ft²66% of homes69% of homes57% of homes
Lot sizebigger than2,614 ft²24% of homes8% of homes5% of homes
Year builtnewer than189561% of homes14% of homes5% of homes

About 20 Union St

When did 20 Union St, Portsmouth, NH last sell?

20 Union St, Portsmouth, NH last sold on Jun 24, 1997 for $162,000, according to the county's recorded deed.

How big is 20 Union St, Portsmouth, NH?

20 Union St, Portsmouth, NH has 4 bedrooms, 2 bathrooms, 1,944 square feet of living space and a 0.06-acre lot.

When was 20 Union St, Portsmouth, NH built?

20 Union St, Portsmouth, NH was built in 1895, making it 131 years old. The building has 2 stories.

What schools serve 20 Union St, Portsmouth, NH?

20 Union St, Portsmouth, NH is assigned to Portsmouth Middle School (middle), rated B; Little Harbour Elementary School (elementary), rated A; 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 20 Union St, Portsmouth, NH compare to other homes in Portsmouth 03801?

Among the 8,130 homes in Portsmouth 03801, it is bigger than 69% of them (1,944 ft² against a typical 1,526 ft²), its lot is bigger than 8% of them (2,614 ft² against a typical 0.22 ac) and it is newer than 14% of them (1895 against a typical 1963). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 20 Union St, Portsmouth, NH?

The 2025 property tax bill for 20 Union St, Portsmouth, NH was $8,745. The county assessed it at $759,800.

More homes on Union St

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Assigned schools

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