Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$768,608$422 / 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 89How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

642 UNION ST

PORTSMOUTH, RI 02871
3
Beds
2.5
Baths
1,821 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.
0.98 ac
Lot SizeThe size of the land the home sits on, from county records.
1971
Year BuiltThe year the home was originally built, according to county records.
1
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

$769K
$687K low$850K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,258 (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.$546,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$259,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$287,000

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.Ranch
CountyNEWPORT
Lot (acres)The size of the land the home sits on, from county records.0.98
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Baseboard
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

Transaction History(4)

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 5–8 · 0.5 mi
E
Melville Elementary SchoolA+
Elementary · Grades KG–4 · 1.7 mi
H
Portsmouth High SchoolA+
High · Grades 9–12 · 4.0 mi

District: Portsmouth School District

Neighborhood · ZIP 02871These 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.84
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.101
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.60

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.89%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
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.1.1%
PopulationHow many people live in this area.16,919
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.620 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$115,631
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$147,136
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.48 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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

642 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.

  • Costs less per square foot than 68% of homes in Newport County
  • Has a bigger lot than 90% of homes in Portsmouth 02871

What homes are worth in Portsmouth 02871

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

This home
$258K$2.5M

This home is worth more than 55% of homes in Portsmouth 02871.

How it measures up in Portsmouth 02871

The dot is this home. The mark in the middle is the typical home in Portsmouth 02871.

Estimated value$768,608
CheaperTypical $720,086Pricier

Pricier than 55% of homes nearby

Price per ft²$422
CheaperTypical $441Pricier

Pricier than 42% of homes nearby

Living area1,821 ft²
SmallerTypical 1,632 ft²Bigger

Bigger than 58% of homes nearby

Lot size0.98 ac
SmallerTypical 0.42 acBigger

Bigger than 90% of homes nearby

Year built1971
OlderTypical 1976Newer

Newer than 44% of homes nearby

How 642 Union St ranks against every home in each area.
MeasureThis homePortsmouth 02871Newport County
Estimated valuepricier than$768,60855% of homes47% of homes
Price per ft²pricier than$42242% of homes32% of homes
Living areabigger than1,821 ft²58% of homes58% of homes
Lot sizebigger than0.98 ac90% of homes82% of homes
Year builtnewer than197144% of homes56% of homes

About 642 Union St

How much is 642 Union St, Portsmouth, RI worth?

The TopHap Estimate for 642 Union St, Portsmouth, RI is $768,608 as of Sep 24, 2026. The likely range is $687,303 to $849,913. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 642 Union St, Portsmouth, RI last sell?

642 Union St, Portsmouth, RI last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 642 Union St, Portsmouth, RI?

642 Union St, Portsmouth, RI has 3 bedrooms, 2.5 bathrooms, 1,821 square feet of living space and a 0.98-acre lot.

When was 642 Union St, Portsmouth, RI built?

642 Union St, Portsmouth, RI was built in 1971, making it 55 years old. It is a ranch home. The building has 1 story.

What schools serve 642 Union St, Portsmouth, RI?

642 Union St, Portsmouth, RI is assigned to Portsmouth Middle School (middle), rated A-; Melville 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 642 Union St, Portsmouth, RI compare to other homes in Portsmouth 02871?

Among the 7,733 homes in Portsmouth 02871, it is worth more than 55% of them ($768,608 against a typical $720,086), its price per square foot is higher than 42% of them ($422 against a typical $441), it is bigger than 58% of them (1,821 ft² against a typical 1,632 ft²), its lot is bigger than 90% of them (0.98 ac against a typical 0.42 ac) and it is newer than 44% of them (1971 against a typical 1976). Measured against all of Newport County, it is worth more than 47% 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 642 Union St, Portsmouth, RI?

The 2025 property tax bill for 642 Union St, Portsmouth, RI was $7,258. The county assessed it at $546,500.

More homes on Union St

Closest homes

More homes in Portsmouth 02871

Assigned schools

Explore the area

See this home in context

Open 642 Union 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