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Single Family ResidenceResidential
$466,609$423 / 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 96How 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 $131,000 on Aug 31, 1998

23 RIVER ST

NORTHBOROUGH, MA 01532
3
Beds
1
Baths
1,104 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.
0.4 ac
Lot SizeThe size of the land the home sits on, from county records.
1911
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

$467K
$450K low$483K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$131,000 · Aug 31, 1998
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.$217,209
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$173,767
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.56%
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.$196,400
FOUNDATION MORTGAGE CO · R · recorded Nov 8, 2004
2nd 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.$53,000
BANK OF RHODE ISLAND

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,569 (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.$390,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$234,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$155,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$340,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$459,040

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.77 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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
CountyWORCESTER
Lot (acres)The size of the land the home sits on, from county records.0.40
ConstructionThe main material the home's frame and walls are built from.Stone
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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
Marion E ZehB
Elementary · Grades KG–5 · 0.6 mi
M
Robert E. Melican Middle SchoolB-
Middle · Grades 6–8 · 1.1 mi
H
Algonquin Regional High SchoolA
High · Grades 9–12 · 1.3 mi

District: Northborough School District

Neighborhood · ZIP 01532These 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.31
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.68

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.16,278
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.868 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$158,286
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$198,404
Average tempThe average temperature here across a full year.48°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.50%

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.No

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

23 River 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 less than 89% of homes in Northborough 01532
  • Costs more per square foot than 92% of homes in Worcester County
  • Smaller than 89% of homes in Northborough 01532
  • Has a smaller lot than 79% of homes in Northborough 01532
  • Older than 95% of homes in Northborough 01532

What homes are worth in Northborough 01532

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

This home
$304K$1.4M

This home is worth more than 11% of homes in Northborough 01532.

How it measures up in Northborough 01532

The dot is this home. The mark in the middle is the typical home in Northborough 01532.

Estimated value$466,609
CheaperTypical $696,386Pricier

Pricier than 11% of homes nearby

Price per ft²$423
CheaperTypical $383Pricier

Pricier than 72% of homes nearby

Living area1,104 ft²
SmallerTypical 1,802 ft²Bigger

Bigger than 11% of homes nearby

Lot size0.4 ac
SmallerTypical 0.56 acBigger

Bigger than 21% of homes nearby

Year built1911
OlderTypical 1975Newer

Newer than 5% of homes nearby

How 23 River St ranks against every home in each area.
MeasureThis homeNorthborough 01532Worcester County
Estimated valuepricier than$466,60911% of homes46% of homes
Price per ft²pricier than$42372% of homes92% of homes
Living areabigger than1,104 ft²11% of homes15% of homes
Lot sizebigger than0.4 ac21% of homes43% of homes
Year builtnewer than19115% of homes16% of homes

About 23 River St

How much is 23 River St, Northborough, MA worth?

The TopHap Estimate for 23 River St, Northborough, MA is $466,609 as of Jul 14, 2026. The likely range is $449,979 to $483,239. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 23 River St, Northborough, MA last sell?

23 River St, Northborough, MA last sold on Aug 31, 1998 for $131,000, according to the county's recorded deed.

How big is 23 River St, Northborough, MA?

23 River St, Northborough, MA has 3 bedrooms, 1 bathrooms, 1,104 square feet of living space and a 0.40-acre lot.

When was 23 River St, Northborough, MA built?

23 River St, Northborough, MA was built in 1911, making it 115 years old. The building has 2 stories.

What schools serve 23 River St, Northborough, MA?

23 River St, Northborough, MA is assigned to Marion E Zeh (elementary), rated B; Robert E. Melican Middle School (middle), rated B-; Algonquin Regional High School (high), rated A. All sit in Northborough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 23 River St, Northborough, MA compare to other homes in Northborough 01532?

Among the 4,998 homes in Northborough 01532, it is worth more than 11% of them ($466,609 against a typical $696,386), its price per square foot is higher than 72% of them ($423 against a typical $383), it is bigger than 11% of them (1,104 ft² against a typical 1,802 ft²), its lot is bigger than 21% of them (0.4 ac against a typical 0.56 ac) and it is newer than 5% of them (1911 against a typical 1975). Measured against all of Worcester County, it is worth more than 46% 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 23 River St, Northborough, MA?

The 2025 property tax bill for 23 River St, Northborough, MA was $5,569. The county assessed it at $390,800.

More homes on River St

Closest homes

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Assigned schools

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