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Single Family ResidenceResidential
$820,885$585 / 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 97How 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 $464,600 on Jan 13, 2017

507 DENNETT ST

PORTSMOUTH, NH 03801
3
Beds
1.5
Baths
1,404 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1941
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$821K
$794K low$847K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$464,600 · Jan 13, 2017
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.$488,385
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$390,708
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.43%
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.$332,500
FREEDOM MORTGAGE CORP · R · recorded Jul 14, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,437 (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.$733,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$359,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$373,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$731,690

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyROCKINGHAM
Lot (acres)The size of the land the home sits on, from county records.0.14
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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.

E
New Franklin Elementary SchoolA
Elementary · Grades KG–5 · 0.1 mi
M
Portsmouth Middle SchoolB
Middle · Grades 6–8 · 0.8 mi
H
Portsmouth High SchoolA+
High · Grades 9–12 · 1.3 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

507 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.

  • Worth more than 79% of homes in Rockingham County
  • Costs more per square foot than 92% of homes in Rockingham County
  • Smaller than 67% of homes in Christian Shore / Creek
  • Has a smaller lot than 90% of homes in Rockingham County
  • Older than 88% of 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
$275K$2.8M

This home is worth more than 54% 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$820,885
CheaperTypical $788,212Pricier

Pricier than 54% of homes nearby

Price per ft²$585
CheaperTypical $544Pricier

Pricier than 60% of homes nearby

Living area1,404 ft²
SmallerTypical 1,527 ft²Bigger

Bigger than 44% of homes nearby

Lot size0.14 ac
SmallerTypical 0.22 acBigger

Bigger than 24% of homes nearby

Year built1941
OlderTypical 1963Newer

Newer than 35% of homes nearby

How 507 Dennett St ranks against every home in each area.
MeasureThis homeChristian Shore / CreekPortsmouth 03801Rockingham County
Estimated valuepricier than$820,88553% of homes54% of homes79% of homes
Price per ft²pricier than$58563% of homes60% of homes92% of homes
Living areabigger than1,404 ft²33% of homes44% of homes34% of homes
Lot sizebigger than0.14 ac37% of homes24% of homes10% of homes
Year builtnewer than194166% of homes35% of homes12% of homes

About 507 Dennett St

How much is 507 Dennett St, Portsmouth, NH worth?

The TopHap Estimate for 507 Dennett St, Portsmouth, NH is $820,885 as of Jul 14, 2026. The likely range is $794,280 to $847,490. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 507 Dennett St, Portsmouth, NH last sell?

507 Dennett St, Portsmouth, NH last sold on Jan 13, 2017 for $464,600, according to the county's recorded deed.

How big is 507 Dennett St, Portsmouth, NH?

507 Dennett St, Portsmouth, NH has 3 bedrooms, 1.5 bathrooms, 1,404 square feet of living space and a 0.14-acre lot.

When was 507 Dennett St, Portsmouth, NH built?

507 Dennett St, Portsmouth, NH was built in 1941, making it 85 years old. It is a cape cod home. The building has 2 stories.

What schools serve 507 Dennett St, Portsmouth, NH?

507 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 507 Dennett St, Portsmouth, NH compare to other homes in Portsmouth 03801?

Among the 8,130 homes in Portsmouth 03801, it is worth more than 54% of them ($820,885 against a typical $788,212), its price per square foot is higher than 60% of them ($585 against a typical $544), it is bigger than 44% of them (1,404 ft² against a typical 1,527 ft²), its lot is bigger than 24% of them (0.14 ac against a typical 0.22 ac) and it is newer than 35% of them (1941 against a typical 1963). Measured against all of Rockingham County, it is worth more than 79% 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 507 Dennett St, Portsmouth, NH?

The 2025 property tax bill for 507 Dennett St, Portsmouth, NH was $8,437. The county assessed it at $733,000.

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