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CondominiumResidential
$525,019$538 / 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 91How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $470,000 on Dec 16, 2025

4 ROCK ST

PORTSMOUTH, NH 03801
Building report
1
Beds
1.5
Baths
975 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.
1807
Year BuiltThe year the home was originally built, according to county records.
2
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

$525K
$478K low$572K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$470,000 · Dec 16, 2025
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$172,519
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$138,015
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.57%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$352,500
UNITED WHOLESALE MORTGAGE · recorded Dec 16, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,470 (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.$475,200 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$475,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$906,015

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Conventional
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.2004
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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 SchoolB
Middle · Grades 6–8 · 0.2 mi
E
Little Harbour Elementary SchoolA
Elementary · Grades KG–5 · 0.8 mi
H
Portsmouth High SchoolA+
High · Grades 9–12 · 1.1 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.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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

4 Rock 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 88% of homes in Islington Creek
  • Costs more per square foot than 89% of homes in Rockingham County
  • Smaller than 87% of homes in Rockingham County
  • Among the oldest homes in Rockingham County

What homes are worth in Portsmouth 03801

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

This home
$277K$2.6M

This home is worth more than 17% 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.

Estimated value$525,019
CheaperTypical $787,646Pricier

Pricier than 17% of homes nearby

Price per ft²$538
CheaperTypical $545Pricier

Pricier than 49% of homes nearby

Living area975 ft²
SmallerTypical 1,527 ft²Bigger

Bigger than 18% of homes nearby

Year built1807
OlderTypical 1962Newer

Newer than 2% of homes nearby

How 4 Rock St ranks against every home in each area.
MeasureThis homeIslington CreekPortsmouth 03801Rockingham County
Estimated valuepricier than$525,01912% of homes17% of homes33% of homes
Price per ft²pricier than$53819% of homes49% of homes89% of homes
Living areabigger than975 ft²19% of homes18% of homes13% of homes
Year builtnewer than18074% of homes2% of homesalmost no homes

About 4 Rock St

How much is 4 Rock St, Portsmouth, NH worth?

The TopHap Estimate for 4 Rock St, Portsmouth, NH is $525,019 as of Jul 14, 2026. The likely range is $478,012 to $572,026. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4 Rock St, Portsmouth, NH last sell?

4 Rock St, Portsmouth, NH last sold on Dec 16, 2025 for $470,000, according to the county's recorded deed.

How big is 4 Rock St, Portsmouth, NH?

4 Rock St, Portsmouth, NH has 1 bedrooms, 1.5 bathrooms and 975 square feet of living space.

When was 4 Rock St, Portsmouth, NH built?

4 Rock St, Portsmouth, NH was built in 1807, making it 219 years old. It is a conventional home. The building has 2 stories.

What schools serve 4 Rock St, Portsmouth, NH?

4 Rock 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 4 Rock St, Portsmouth, NH compare to other homes in Portsmouth 03801?

Among the 8,130 homes in Portsmouth 03801, it is worth more than 17% of them ($525,019 against a typical $787,646), its price per square foot is higher than 49% of them ($538 against a typical $545), it is bigger than 18% of them (975 ft² against a typical 1,527 ft²) and it is newer than 2% of them (1807 against a typical 1962). Measured against all of Rockingham County, it is worth more than 33% 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 4 Rock St, Portsmouth, NH?

The 2025 property tax bill for 4 Rock St, Portsmouth, NH was $5,470. The county assessed it at $475,200.

More homes on Rock St

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Assigned schools

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