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Single Family ResidenceResidential
$561,224$552 / 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 $220,000 on Feb 4, 2011

21 GRAND ST

SOUTH AMBOY, NJ 08879
0
Baths
1,017 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.
1936
Year BuiltThe year the home was originally built, according to county records.

Valuation

$561K
$505K low$618K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$220,000 · Feb 4, 2011

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,048 (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.$112,600 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$52,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$60,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$112,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$112,600

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.47
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
29
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
68
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
91
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
47
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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.0.12
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(10)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Dwight D. Eisenhower Elementary SchoolB-
Elementary · Grades KG–3 · 0.9 mi
H
Sayreville War Memorial High SchoolC-
High · Grades 9–12 · 2.1 mi
M
Sayreville Middle SchoolC+
Middle · Grades 6–8 · 2.4 mi

District: Sayreville Borough School District

Neighborhood · ZIP 08879These 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.102
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.102

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.23,254
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,866 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$86,649
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$104,457
Average tempThe average temperature here across a full year.54°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

21 Grand 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 more per square foot than 97% of homes in Middlesex County
  • Smaller than 89% of homes in Middlesex County
  • Has a smaller lot than 68% of homes in Middlesex County
  • Older than 86% of homes in Middlesex County

What homes are worth in South Amboy 08879

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

This home
$310K$957K

This home is worth more than 62% of homes in South Amboy 08879.

How it measures up in South Amboy 08879

The dot is this home. The mark in the middle is the typical home in South Amboy 08879.

Estimated value$561,224
CheaperTypical $517,435Pricier

Pricier than 62% of homes nearby

Price per ft²$552
CheaperTypical $375Pricier

Pricier than 94% of homes nearby

Living area1,017 ft²
SmallerTypical 1,410 ft²Bigger

Bigger than 21% of homes nearby

Lot size0.11 ac
SmallerTypical 0.11 acBigger

Bigger than 33% of homes nearby

Year built1936
OlderTypical 1954Newer

Newer than 31% of homes nearby

How 21 Grand St ranks against every home in each area.
MeasureThis homeSouth Amboy 08879Middlesex County
Estimated valuepricier than$561,22462% of homes45% of homes
Price per ft²pricier than$55294% of homes97% of homes
Living areabigger than1,017 ft²21% of homes11% of homes
Lot sizebigger than0.11 ac33% of homes32% of homes
Year builtnewer than193631% of homes14% of homes

About 21 Grand St

How much is 21 Grand St, South Amboy, NJ worth?

The TopHap Estimate for 21 Grand St, South Amboy, NJ is $561,224 as of Sep 24, 2026. The likely range is $504,750 to $617,698. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Grand St, South Amboy, NJ last sell?

21 Grand St, South Amboy, NJ last sold on Feb 4, 2011 for $220,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 Grand St, South Amboy, NJ?

21 Grand St, South Amboy, NJ has 1,017 square feet of living space and a 0.12-acre lot.

When was 21 Grand St, South Amboy, NJ built?

21 Grand St, South Amboy, NJ was built in 1936, making it 90 years old.

What schools serve 21 Grand St, South Amboy, NJ?

21 Grand St, South Amboy, NJ is assigned to Dwight D. Eisenhower Elementary School (elementary), rated B-; Sayreville War Memorial High School (high), rated C-; Sayreville Middle School (middle), rated C+. All sit in Sayreville Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Grand St, South Amboy, NJ compare to other homes in South Amboy 08879?

Among the 7,042 homes in South Amboy 08879, it is worth more than 62% of them ($561,224 against a typical $517,435), its price per square foot is higher than 94% of them ($552 against a typical $375), it is bigger than 21% of them (1,017 ft² against a typical 1,410 ft²), its lot is bigger than 33% of them (0.11 ac against a typical 0.11 ac) and it is newer than 31% of them (1936 against a typical 1954). Measured against all of Middlesex County, it is worth more than 45% 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 21 Grand St, South Amboy, NJ?

The 2025 property tax bill for 21 Grand St, South Amboy, NJ was $7,048. The county assessed it at $112,600.

More homes on Grand St

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