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Duplex (2 Units, Any Combination)Residential
Last sold for $427,500 on Oct 1, 2014

603 DENNETT ST

PORTSMOUTH, NH 03801
5
Beds
3.5
Baths
2,598 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
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.$427,500 · Oct 1, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,936 (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.$776,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$406,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$369,900

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.0.29
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

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.

E
New Franklin Elementary SchoolA
Elementary · Grades KG–5 · 0.1 mi
M
Portsmouth Middle SchoolB
Middle · Grades 6–8 · 0.9 mi
H
Portsmouth High SchoolA+
High · Grades 9–12 · 1.2 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.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

603 Dennett 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 88% of homes in Christian Shore / Creek
  • Has a bigger lot than 83% of homes in Christian Shore / Creek
  • Older than 88% 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 area2,598 ft²
SmallerTypical 1,512 ft²Bigger

Bigger than 87% of homes nearby

Lot size0.29 ac
SmallerTypical 0.22 acBigger

Bigger than 63% of homes nearby

Year built1940
OlderTypical 1962Newer

Newer than 35% of homes nearby

How 603 Dennett St ranks against every home in each area.
MeasureThis homeChristian Shore / CreekPortsmouth 03801Rockingham County
Living areabigger than2,598 ft²88% of homes87% of homes78% of homes
Lot sizebigger than0.29 ac83% of homes63% of homes21% of homes
Year builtnewer than194065% of homes35% of homes12% of homes

About 603 Dennett St

When did 603 Dennett St, Portsmouth, NH last sell?

603 Dennett St, Portsmouth, NH last sold on Oct 1, 2014 for $427,500, according to the county's recorded deed.

How big is 603 Dennett St, Portsmouth, NH?

603 Dennett St, Portsmouth, NH has 5 bedrooms, 3.5 bathrooms, 2,598 square feet of living space and a 0.29-acre lot.

When was 603 Dennett St, Portsmouth, NH built?

603 Dennett St, Portsmouth, NH was built in 1940, making it 86 years old. The building has 2 stories.

What schools serve 603 Dennett St, Portsmouth, NH?

603 Dennett 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 603 Dennett St, Portsmouth, NH compare to other homes in Portsmouth 03801?

Among the 8,130 homes in Portsmouth 03801, it is bigger than 87% of them (2,598 ft² against a typical 1,512 ft²), its lot is bigger than 63% of them (0.29 ac against a typical 0.22 ac) and it is newer than 35% of them (1940 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 603 Dennett St, Portsmouth, NH?

The 2025 property tax bill for 603 Dennett St, Portsmouth, NH was $8,936. The county assessed it at $776,400.

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Assigned schools

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