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Single Family ResidenceResidential
$2,176,278$787 / 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 90How 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
Last sold for $2,100,000 on Sep 29, 2025

77 WILLIAM ST

PORTSMOUTH, RI 02871
3
Beds
4
Baths
2,766 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
2002
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$2.2M
$2M low$2.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$2,100,000 · Sep 29, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,786 (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.$1,264,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$634,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$629,400

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.55
100
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
5
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
56
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
89
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
28
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.197 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.48%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

Scores 0–100; higher = greater projected risk.

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.Colonial
CountyNEWPORT
Lot (acres)The size of the land the home sits on, from county records.0.12
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
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(8)

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.

H
Portsmouth High SchoolA+
High · Grades 9–12 · 2.5 mi
E
Hathaway Elementary SchoolA
Elementary · Grades KG–4 · 2.7 mi
M
Portsmouth Middle SchoolA-
Middle · Grades 5–8 · 2.9 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%

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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

77 William 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 97% of homes in Portsmouth 02871
  • Costs more per square foot than 96% of homes in Portsmouth 02871
  • Bigger than 88% of homes in Portsmouth 02871
  • Has a smaller lot than 91% of homes in Portsmouth 02871
  • Newer than 88% of homes in Newport County

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
$254K$2.4M

This home is worth more than 97% 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$2,176,278
CheaperTypical $715,322Pricier

Pricier than 97% of homes nearby

Price per ft²$787
CheaperTypical $443Pricier

Pricier than 96% of homes nearby

Living area2,766 ft²
SmallerTypical 1,620 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.11 ac
SmallerTypical 0.41 acBigger

Bigger than 9% of homes nearby

Year built2002
OlderTypical 1976Newer

Newer than 84% of homes nearby

How 77 William St ranks against every home in each area.
MeasureThis homePortsmouth 02871Newport County
Estimated valuepricier than$2,176,27897% of homes92% of homes
Price per ft²pricier than$78796% of homes84% of homes
Living areabigger than2,766 ft²88% of homes86% of homes
Lot sizebigger than0.11 ac9% of homes14% of homes
Year builtnewer than200284% of homes88% of homes

About 77 William St

How much is 77 William St, Portsmouth, RI worth?

The TopHap Estimate for 77 William St, Portsmouth, RI is $2,176,278 as of Sep 24, 2026. The likely range is $1,968,222 to $2,384,334. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 77 William St, Portsmouth, RI last sell?

77 William St, Portsmouth, RI last sold on Sep 29, 2025 for $2,100,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 77 William St, Portsmouth, RI?

77 William St, Portsmouth, RI has 3 bedrooms, 4 bathrooms, 2,766 square feet of living space and a 0.12-acre lot.

When was 77 William St, Portsmouth, RI built?

77 William St, Portsmouth, RI was built in 2002, making it 24 years old. It is a colonial home. The building has 3 stories.

What schools serve 77 William St, Portsmouth, RI?

77 William St, Portsmouth, RI is assigned to Portsmouth High School (high), rated A+; Hathaway Elementary School (elementary), rated A; Portsmouth Middle School (middle), rated A-. All sit in Portsmouth School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 77 William St, Portsmouth, RI compare to other homes in Portsmouth 02871?

Among the 7,733 homes in Portsmouth 02871, it is worth more than 97% of them ($2,176,278 against a typical $715,322), its price per square foot is higher than 96% of them ($787 against a typical $443), it is bigger than 88% of them (2,766 ft² against a typical 1,620 ft²), its lot is bigger than 9% of them (0.11 ac against a typical 0.41 ac) and it is newer than 84% of them (2002 against a typical 1976). Measured against all of Newport County, it is worth more than 92% 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 77 William St, Portsmouth, RI?

The 2025 property tax bill for 77 William St, Portsmouth, RI was $16,786. The county assessed it at $1,264,000.

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