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Single Family ResidenceResidential
$1,830,327$558 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $825,000 on Apr 9, 2003

21 CASTLE HOWARD CT

PRINCETON, NJ 08540
0
Baths
3,282 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.
0.5 ac
Lot SizeThe size of the land the home sits on, from county records.
1957
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.8M
$1.8M low$1.9M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$825,000 · Apr 9, 2003

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$28,959 (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.$1,059,600 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$550,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$509,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,059,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,059,600

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.0.50
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

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

E
Riverside Elementary SchoolA+
Elementary · Grades PK–5 · 0.2 mi
M
Princeton Middle SchoolA
Middle · Grades 6–8 · 1.1 mi
H
Princeton High SchoolB
High · Grades 9–12 · 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

21 Castle Howard Ct 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 98% of homes in Mercer County
  • Costs more per square foot than 97% of homes in Mercer County
  • Bigger than 94% of homes in Mercer County
  • Has a bigger lot than 83% of homes in Mercer County
  • Older than 74% 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
$305K$3.3M

This home is worth more than 87% 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$1,830,327
CheaperTypical $1,006,107Pricier

Pricier than 87% of homes nearby

Price per ft²$558
CheaperTypical $426Pricier

Pricier than 77% of homes nearby

Living area3,282 ft²
SmallerTypical 2,244 ft²Bigger

Bigger than 79% of homes nearby

Lot size0.5 ac
SmallerTypical 0.29 acBigger

Bigger than 62% of homes nearby

Year built1957
OlderTypical 1986Newer

Newer than 26% of homes nearby

How 21 Castle Howard Ct ranks against every home in each area.
MeasureThis homePrinceton 08540Mercer County
Estimated valuepricier than$1,830,32787% of homes98% of homes
Price per ft²pricier than$55877% of homes97% of homes
Living areabigger than3,282 ft²79% of homes94% of homes
Lot sizebigger than0.5 ac62% of homes83% of homes
Year builtnewer than195726% of homes46% of homes

About 21 Castle Howard Ct

How much is 21 Castle Howard Ct, Princeton, NJ worth?

The TopHap Estimate for 21 Castle Howard Ct, Princeton, NJ is $1,830,327 as of Oct 21, 2026. The likely range is $1,750,316 to $1,910,338. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Castle Howard Ct, Princeton, NJ last sell?

21 Castle Howard Ct, Princeton, NJ last sold on Apr 9, 2003 for $825,000, according to the county's recorded deed.

How big is 21 Castle Howard Ct, Princeton, NJ?

21 Castle Howard Ct, Princeton, NJ has 3,282 square feet of living space and a 0.50-acre lot.

When was 21 Castle Howard Ct, Princeton, NJ built?

21 Castle Howard Ct, Princeton, NJ was built in 1957, making it 69 years old. The building has 1 story.

What schools serve 21 Castle Howard Ct, Princeton, NJ?

21 Castle Howard Ct, Princeton, NJ is assigned to Riverside Elementary School (elementary), rated A+; Princeton Middle School (middle), rated A; Princeton High School (high), rated B. All sit in Princeton Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Castle Howard Ct, Princeton, NJ compare to other homes in Princeton 08540?

Among the 13,642 homes in Princeton 08540, it is worth more than 87% of them ($1,830,327 against a typical $1,006,107), its price per square foot is higher than 77% of them ($558 against a typical $426), it is bigger than 79% of them (3,282 ft² against a typical 2,244 ft²), its lot is bigger than 62% of them (0.5 ac against a typical 0.29 ac) and it is newer than 26% of them (1957 against a typical 1986). Measured against all of Mercer County, it is worth more than 98% 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 Castle Howard Ct, Princeton, NJ?

The 2025 property tax bill for 21 Castle Howard Ct, Princeton, NJ was $28,959. The county assessed it at $1,059,600.

More homes on Castle Howard Ct

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