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Single Family ResidenceResidential
$1,188,306$460 / 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 89How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

20 ALEXANDER ST

PRINCETON, NJ 08540
0
Baths
2,583 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1960
Year BuiltThe year the home was originally built, according to county records.

Valuation

$1.2M
$1.1M low$1.3M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$18,981 (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.$694,500 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$533,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$160,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$694,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$694,500

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.44
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
18
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.
94
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.

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
CountyMERCER
Lot (acres)The size of the land the home sits on, from county records.0.18
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Community Park Elementary SchoolA-
Elementary · Grades PK–5 · 0.8 mi
H
Princeton High SchoolA-
High · Grades 9–12 · 0.9 mi
M
Princeton Middle SchoolA+
Middle · Grades 6–8 · 1.1 mi

District: Princeton Public Schools

Neighborhood · ZIP 08540These 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.65
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.94
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.92

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.5%
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.53,074
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,031 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$158,898
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$213,931
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.49 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

20 Alexander 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 93% of homes in Mercer County
  • Costs more per square foot than 94% of homes in Mercer County
  • Bigger than 85% of homes in Mercer County
  • Older than 70% of homes in Princeton 08540

What homes are worth in Princeton 08540

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

This home
$309K$3.4M

This home is worth more than 63% of homes in Princeton 08540.

How it measures up in Princeton 08540

The dot is this home. The mark in the middle is the typical home in Princeton 08540.

Estimated value$1,188,306
CheaperTypical $1,002,948Pricier

Pricier than 63% of homes nearby

Price per ft²$460
CheaperTypical $427Pricier

Pricier than 59% of homes nearby

Living area2,583 ft²
SmallerTypical 2,249 ft²Bigger

Bigger than 62% of homes nearby

Lot size0.18 ac
SmallerTypical 0.28 acBigger

Bigger than 38% of homes nearby

Year built1960
OlderTypical 1986Newer

Newer than 30% of homes nearby

How 20 Alexander St ranks against every home in each area.
MeasureThis homePrinceton 08540Mercer County
Estimated valuepricier than$1,188,30663% of homes93% of homes
Price per ft²pricier than$46059% of homes94% of homes
Living areabigger than2,583 ft²62% of homes85% of homes
Lot sizebigger than0.18 ac38% of homes55% of homes
Year builtnewer than196030% of homes51% of homes

About 20 Alexander St

How much is 20 Alexander St, Princeton, NJ worth?

The TopHap Estimate for 20 Alexander St, Princeton, NJ is $1,188,306 as of Aug 30, 2026. The likely range is $1,058,071 to $1,318,541. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Alexander St, Princeton, NJ last sell?

20 Alexander St, Princeton, NJ last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 20 Alexander St, Princeton, NJ?

20 Alexander St, Princeton, NJ has 2,583 square feet of living space and a 0.18-acre lot.

When was 20 Alexander St, Princeton, NJ built?

20 Alexander St, Princeton, NJ was built in 1960, making it 66 years old.

What schools serve 20 Alexander St, Princeton, NJ?

20 Alexander St, Princeton, NJ is assigned to Community Park Elementary School (elementary), rated A-; Princeton High School (high), rated A-; Princeton Middle School (middle), rated A+. All sit in Princeton Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Alexander St, Princeton, NJ compare to other homes in Princeton 08540?

Among the 13,780 homes in Princeton 08540, it is worth more than 63% of them ($1,188,306 against a typical $1,002,948), its price per square foot is higher than 59% of them ($460 against a typical $427), it is bigger than 62% of them (2,583 ft² against a typical 2,249 ft²), its lot is bigger than 38% of them (0.18 ac against a typical 0.28 ac) and it is newer than 30% of them (1960 against a typical 1986). Measured against all of Mercer County, it is worth more than 93% 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 20 Alexander St, Princeton, NJ?

The 2025 property tax bill for 20 Alexander St, Princeton, NJ was $18,981. The county assessed it at $694,500.

More homes on Alexander St

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Assigned schools

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