Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential
$806,936$384 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $400,000 on Jun 29, 2007

300 CASS ST

PORTSMOUTH, NH 03801
3
Beds
2
Baths
2,100 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.
1900
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$807K
$760K low$854K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$400,000 · Jun 29, 2007

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,430 (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.$906,200 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$906,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$671,270

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.2002
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
FireplaceWhether the home has a fireplace, and what kind.Yes
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 · 0.5 mi
H
Portsmouth High SchoolA+
High · Grades 9–12 · 0.7 mi
E
Little Harbour Elementary SchoolA
Elementary · Grades KG–5 · 0.7 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%

Owner Tools

Do you own this home?
Claim this home

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

300 Cass 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 77% of homes in Rockingham County
  • Costs less per square foot than 86% of homes in Portsmouth 03801
  • Bigger than 74% of homes in Portsmouth 03801
  • Older than 94% 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
$274K$2.7M

This home is worth more than 51% 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$806,936
CheaperTypical $799,000Pricier

Pricier than 51% of homes nearby

Price per ft²$384
CheaperTypical $554Pricier

Pricier than 14% of homes nearby

Living area2,100 ft²
SmallerTypical 1,524 ft²Bigger

Bigger than 74% of homes nearby

Year built1900
OlderTypical 1963Newer

Newer than 19% of homes nearby

How 300 Cass St ranks against every home in each area.
MeasureThis homePortsmouth 03801Rockingham County
Estimated valuepricier than$806,93651% of homes77% of homes
Price per ft²pricier than$38414% of homes67% of homes
Living areabigger than2,100 ft²74% of homes63% of homes
Year builtnewer than190019% of homes6% of homes

About 300 Cass St

How much is 300 Cass St, Portsmouth, NH worth?

The TopHap Estimate for 300 Cass St, Portsmouth, NH is $806,936 as of Aug 30, 2026. The likely range is $759,935 to $853,937. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 300 Cass St, Portsmouth, NH last sell?

300 Cass St, Portsmouth, NH last sold on Jun 29, 2007 for $400,000, according to the county's recorded deed.

How big is 300 Cass St, Portsmouth, NH?

300 Cass St, Portsmouth, NH has 3 bedrooms, 2 bathrooms and 2,100 square feet of living space.

When was 300 Cass St, Portsmouth, NH built?

300 Cass St, Portsmouth, NH was built in 1900, making it 126 years old. It is a conventional home. The building has 2 stories.

What schools serve 300 Cass St, Portsmouth, NH?

300 Cass St, Portsmouth, NH is assigned to Portsmouth Middle School (middle), rated B; Portsmouth High School (high), rated A+; Little Harbour Elementary School (elementary), rated A. All sit in Portsmouth School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 300 Cass St, Portsmouth, NH compare to other homes in Portsmouth 03801?

Among the 8,130 homes in Portsmouth 03801, it is worth more than 51% of them ($806,936 against a typical $799,000), its price per square foot is higher than 14% of them ($384 against a typical $554), it is bigger than 74% of them (2,100 ft² against a typical 1,524 ft²) and it is newer than 19% of them (1900 against a typical 1963). Measured against all of Rockingham County, it is worth more than 77% 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 300 Cass St, Portsmouth, NH?

The 2025 property tax bill for 300 Cass St, Portsmouth, NH was $10,430. The county assessed it at $906,200.

More homes on Cass St

Closest homes

More homes in Portsmouth 03801

Assigned schools

Explore the area

See this home in context

Open 300 Cass St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map