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Single Family ResidenceResidential
$664,482$441 / 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 86How 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 $260,000 on Apr 23, 2010

128 RIVER ST

MONROE TOWNSHIP, NJ 08831
0
Baths
1,508 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1979
Year BuiltThe year the home was originally built, according to county records.

Valuation

$664K
$572K low$757K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$260,000 · Apr 23, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,711 (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.$337,900 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$175,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$162,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$337,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$337,900

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.16 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.minimal

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
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.23
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
Mill Lake Elementary SchoolB
Elementary · Grades PK–2 · 1.3 mi
H
Monroe Township High SchoolB
High · Grades 9–12 · 4.2 mi
M
Monroe Township Middle SchoolA-
Middle · Grades 6–8 · 4.5 mi

District: Monroe Township School District

Neighborhood · ZIP 08831These 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.58
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.90

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.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.58,546
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,176 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$116,679
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$146,555
Average tempThe average temperature here across a full year.53°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.56%

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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

128 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 more than 66% of homes in Middlesex County
  • Costs more per square foot than 96% of homes in Monroe Township 08831
  • Smaller than 72% of homes in Monroe Township 08831
  • Has a bigger lot than 81% of homes in Monroe Township 08831
  • Older than 75% of homes in Monroe Township 08831

What homes are worth in Monroe Township 08831

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

This home
$250K$1.6M

This home is worth more than 51% of homes in Monroe Township 08831.

How it measures up in Monroe Township 08831

The dot is this home. The mark in the middle is the typical home in Monroe Township 08831.

Estimated value$664,482
CheaperTypical $652,825Pricier

Pricier than 51% of homes nearby

Price per ft²$441
CheaperTypical $324Pricier

Pricier than 96% of homes nearby

Living area1,508 ft²
SmallerTypical 1,953 ft²Bigger

Bigger than 28% of homes nearby

Lot size0.23 ac
SmallerTypical 1,525 ft²Bigger

Bigger than 81% of homes nearby

Year built1979
OlderTypical 1996Newer

Newer than 25% of homes nearby

How 128 River St ranks against every home in each area.
MeasureThis homeMonroe Township 08831Middlesex County
Estimated valuepricier than$664,48251% of homes66% of homes
Price per ft²pricier than$44196% of homes83% of homes
Living areabigger than1,508 ft²28% of homes42% of homes
Lot sizebigger than0.23 ac81% of homes70% of homes
Year builtnewer than197925% of homes60% of homes

About 128 River St

How much is 128 River St, Monroe Township, NJ worth?

The TopHap Estimate for 128 River St, Monroe Township, NJ is $664,482 as of Jul 14, 2026. The likely range is $571,773 to $757,191. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 128 River St, Monroe Township, NJ last sell?

128 River St, Monroe Township, NJ last sold on Apr 23, 2010 for $260,000, according to the county's recorded deed.

How big is 128 River St, Monroe Township, NJ?

128 River St, Monroe Township, NJ has 1,508 square feet of living space and a 0.23-acre lot.

When was 128 River St, Monroe Township, NJ built?

128 River St, Monroe Township, NJ was built in 1979, making it 47 years old.

What schools serve 128 River St, Monroe Township, NJ?

128 River St, Monroe Township, NJ is assigned to Mill Lake Elementary School (elementary), rated B; Monroe Township High School (high), rated B; Monroe Township Middle School (middle), rated A-. All sit in Monroe Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 128 River St, Monroe Township, NJ compare to other homes in Monroe Township 08831?

Among the 24,017 homes in Monroe Township 08831, it is worth more than 51% of them ($664,482 against a typical $652,825), its price per square foot is higher than 96% of them ($441 against a typical $324), it is bigger than 28% of them (1,508 ft² against a typical 1,953 ft²), its lot is bigger than 81% of them (0.23 ac against a typical 1,525 ft²) and it is newer than 25% of them (1979 against a typical 1996). Measured against all of Middlesex County, it is worth more than 66% 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 128 River St, Monroe Township, NJ?

The 2025 property tax bill for 128 River St, Monroe Township, NJ was $9,711. The county assessed it at $337,900.

More homes on River St

Closest homes

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Assigned schools

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