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Single Family ResidenceResidential
$900,237$307 / 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 97How 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 $495,000 on Mar 13, 2019

21 LANI ST

MONROE TOWNSHIP, NJ 08831
0
Baths
2,928 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.
0.69 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

$900K
$870K low$931K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$495,000 · Mar 13, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,804 (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.$410,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$159,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$251,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$410,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$410,700

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.0.69
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 · 0.7 mi
H
Monroe Township High SchoolB
High · Grades 9–12 · 3.4 mi
M
Monroe Township Middle SchoolA
Middle · Grades 6–8 · 3.7 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

21 Lani 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 89% of homes in Middlesex County
  • Costs less per square foot than 79% of homes in Middlesex County
  • Bigger than 92% of homes in Middlesex County
  • Has a bigger lot than 95% of homes in Middlesex County
  • 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
$239K$1.5M

This home is worth more than 77% 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$900,237
CheaperTypical $647,387Pricier

Pricier than 77% of homes nearby

Price per ft²$307
CheaperTypical $319Pricier

Pricier than 44% of homes nearby

Living area2,928 ft²
SmallerTypical 1,969 ft²Bigger

Bigger than 82% of homes nearby

Lot size0.69 ac
SmallerTypical 1,568 ft²Bigger

Bigger than 90% of homes nearby

Year built1979
OlderTypical 1997Newer

Newer than 25% of homes nearby

How 21 Lani St ranks against every home in each area.
MeasureThis homeMonroe Township 08831Middlesex County
Estimated valuepricier than$900,23777% of homes89% of homes
Price per ft²pricier than$30744% of homes21% of homes
Living areabigger than2,928 ft²82% of homes92% of homes
Lot sizebigger than0.69 ac90% of homes95% of homes
Year builtnewer than197925% of homes60% of homes

About 21 Lani St

How much is 21 Lani St, Monroe Township, NJ worth?

The TopHap Estimate for 21 Lani St, Monroe Township, NJ is $900,237 as of Sep 24, 2026. The likely range is $869,890 to $930,584. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Lani St, Monroe Township, NJ last sell?

21 Lani St, Monroe Township, NJ last sold on Mar 13, 2019 for $495,000, according to the county's recorded deed.

How big is 21 Lani St, Monroe Township, NJ?

21 Lani St, Monroe Township, NJ has 2,928 square feet of living space and a 0.69-acre lot.

When was 21 Lani St, Monroe Township, NJ built?

21 Lani St, Monroe Township, NJ was built in 1979, making it 47 years old.

What schools serve 21 Lani St, Monroe Township, NJ?

21 Lani 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 21 Lani 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 77% of them ($900,237 against a typical $647,387), its price per square foot is higher than 44% of them ($307 against a typical $319), it is bigger than 82% of them (2,928 ft² against a typical 1,969 ft²), its lot is bigger than 90% of them (0.69 ac against a typical 1,568 ft²) and it is newer than 25% of them (1979 against a typical 1997). Measured against all of Middlesex County, it is worth more than 89% 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 Lani St, Monroe Township, NJ?

The 2025 property tax bill for 21 Lani St, Monroe Township, NJ was $11,804. The county assessed it at $410,700.

More homes on Lani St

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More homes in Monroe Township 08831

Assigned schools

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