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Single Family ResidenceResidential
$626,835$320 / 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 93How 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 $295,000 on Sep 2, 2009

21 MARLBOROUGH AVE

MIDDLESEX, NJ 08846
0
Baths
1,960 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.
1949
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$627K
$581K low$673K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$295,000 · Sep 2, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,731 (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.$551,800 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$144,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$407,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$506,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$551,800

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.51
45
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
3
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.
96
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
43
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.11 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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
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.

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

E
Watchung Elementary SchoolB
Elementary · Grades KG–3 · 0.3 mi
M
Von E. Mauger Middle SchoolC
Middle · Grades 6–8 · 0.3 mi
H
Middlesex High SchoolC-
High · Grades 9–12 · 0.8 mi

District: Middlesex Borough School District

Neighborhood · ZIP 08846These 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.71
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.99

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.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.8%
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.15,047
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,267 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$105,430
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$138,542
Average tempThe average temperature here across a full year.52°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 Marlborough Ave 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 78% of homes in Middlesex 08846
  • Costs less per square foot than 73% of homes in Middlesex County
  • Bigger than 75% of homes in Middlesex 08846
  • Has a bigger lot than 76% of homes in Middlesex 08846
  • Older than 78% of homes in Middlesex County

What homes are worth in Middlesex 08846

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

This home
$276K$792K

This home is worth more than 78% of homes in Middlesex 08846.

How it measures up in Middlesex 08846

The dot is this home. The mark in the middle is the typical home in Middlesex 08846.

Estimated value$626,835
CheaperTypical $532,912Pricier

Pricier than 78% of homes nearby

Price per ft²$320
CheaperTypical $347Pricier

Pricier than 34% of homes nearby

Living area1,960 ft²
SmallerTypical 1,534 ft²Bigger

Bigger than 75% of homes nearby

Lot size0.23 ac
SmallerTypical 0.17 acBigger

Bigger than 76% of homes nearby

Year built1949
OlderTypical 1955Newer

Newer than 24% of homes nearby

How 21 Marlborough Ave ranks against every home in each area.
MeasureThis homeMiddlesex 08846Middlesex County
Estimated valuepricier than$626,83578% of homes60% of homes
Price per ft²pricier than$32034% of homes27% of homes
Living areabigger than1,960 ft²75% of homes67% of homes
Lot sizebigger than0.23 ac76% of homes70% of homes
Year builtnewer than194924% of homes22% of homes

About 21 Marlborough Ave

How much is 21 Marlborough Ave, Middlesex, NJ worth?

The TopHap Estimate for 21 Marlborough Ave, Middlesex, NJ is $626,835 as of Sep 24, 2026. The likely range is $580,693 to $672,977. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Marlborough Ave, Middlesex, NJ last sell?

21 Marlborough Ave, Middlesex, NJ last sold on Sep 2, 2009 for $295,000, according to the county's recorded deed.

How big is 21 Marlborough Ave, Middlesex, NJ?

21 Marlborough Ave, Middlesex, NJ has 1,960 square feet of living space and a 0.23-acre lot.

When was 21 Marlborough Ave, Middlesex, NJ built?

21 Marlborough Ave, Middlesex, NJ was built in 1949, making it 77 years old. The building has 1 story.

What schools serve 21 Marlborough Ave, Middlesex, NJ?

21 Marlborough Ave, Middlesex, NJ is assigned to Watchung Elementary School (elementary), rated B; Von E. Mauger Middle School (middle), rated C; Middlesex High School (high), rated C-. All sit in Middlesex Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Marlborough Ave, Middlesex, NJ compare to other homes in Middlesex 08846?

Among the 4,200 homes in Middlesex 08846, it is worth more than 78% of them ($626,835 against a typical $532,912), its price per square foot is higher than 34% of them ($320 against a typical $347), it is bigger than 75% of them (1,960 ft² against a typical 1,534 ft²), its lot is bigger than 76% of them (0.23 ac against a typical 0.17 ac) and it is newer than 24% of them (1949 against a typical 1955). Measured against all of Middlesex County, it is worth more than 60% 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 Marlborough Ave, Middlesex, NJ?

The 2025 property tax bill for 21 Marlborough Ave, Middlesex, NJ was $10,731. The county assessed it at $551,800.

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