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Triplex (3 Units, Any Combination)Residential
Last sold for $975,000 on Sep 25, 2024

171 UNION ST

PORTSMOUTH, NH 03801
7
Beds
3
Baths
2,193 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.
1,742 ft²
Lot SizeThe size of the land the home sits on, from county records.
1820
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
12
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.$975,000 · Sep 25, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,260 (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.$891,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$406,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$485,200

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Triplex (3 Units, Any Combination)
CountyROCKINGHAM
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.2009
Lot (acres)The size of the land the home sits on, from county records.0.04
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

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.

M
Portsmouth Middle SchoolA
Middle · Grades 6–8 · 0.3 mi
E
Little Harbour Elementary SchoolA+
Elementary · Grades KG–5 · 0.7 mi
H
Portsmouth High SchoolA
High · Grades 9–12 · 0.8 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

171 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 77% of homes in Portsmouth 03801
  • Among the smallest lots in Portsmouth 03801
  • Older than 98% 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 area2,193 ft²
SmallerTypical 1,521 ft²Bigger

Bigger than 77% of homes nearby

Lot size1,742 ft²
SmallerTypical 0.22 acBigger

Smaller than almost all homes nearby

Year built1820
OlderTypical 1964Newer

Newer than 3% of homes nearby

How 171 Union St ranks against every home in each area.
MeasureThis homeGoodwin ParkPortsmouth 03801Rockingham County
Living areabigger than2,193 ft²73% of homes77% of homes66% of homes
Lot sizebigger than1,742 ft²4% of homesalmost no homes3% of homes
Year builtnewer than182010% of homes3% of homes2% of homes

About 171 Union St

When did 171 Union St, Portsmouth, NH last sell?

171 Union St, Portsmouth, NH last sold on Sep 25, 2024 for $975,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 171 Union St, Portsmouth, NH?

171 Union St, Portsmouth, NH has 7 bedrooms, 3 bathrooms, 2,193 square feet of living space and a 0.04-acre lot.

When was 171 Union St, Portsmouth, NH built?

171 Union St, Portsmouth, NH was built in 1820, making it 206 years old. The building has 2 stories.

What schools serve 171 Union St, Portsmouth, NH?

171 Union St, Portsmouth, NH is assigned to Portsmouth Middle School (middle), rated A; 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 171 Union St, Portsmouth, NH compare to other homes in Portsmouth 03801?

Among the 8,130 homes in Portsmouth 03801, it is bigger than 77% of them (2,193 ft² against a typical 1,521 ft²), its lot is bigger than almost none of them (1,742 ft² against a typical 0.22 ac) and it is newer than 3% of them (1820 against a typical 1964). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 171 Union St, Portsmouth, NH?

The 2025 property tax bill for 171 Union St, Portsmouth, NH was $10,260. The county assessed it at $891,400.

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