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Single Family ResidenceResidential
$1,399,000$594 / 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 $1,379,800 on Oct 28, 2026

321 WALNUT LN

PRINCETON, NJ 08540
0
Baths
2,356 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.
0.32 ac
Lot SizeThe size of the land the home sits on, from county records.
1954
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.4M
$1.3M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,379,800 · Oct 28, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$18,956 (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.$693,600 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$357,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$336,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$693,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$693,600

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.0.32
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.

M
Princeton Middle SchoolA
Middle · Grades 6–8 · 0.2 mi
H
Princeton High SchoolB
High · Grades 9–12 · 0.4 mi
E
Community Park Elementary SchoolA-
Elementary · Grades PK–5 · 0.5 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

321 Walnut Ln 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 96% of homes in Mercer County
  • Costs more per square foot than 97% of homes in Mercer County
  • Bigger than 80% of homes in Mercer County
  • Has a bigger lot than 71% of homes in Mercer County
  • Older than 79% 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
$286K$3.3M

This home is worth more than 74% 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$1,399,000
CheaperTypical $1,004,601Pricier

Pricier than 74% of homes nearby

Price per ft²$594
CheaperTypical $426Pricier

Pricier than 83% of homes nearby

Living area2,356 ft²
SmallerTypical 2,258 ft²Bigger

Bigger than 55% of homes nearby

Lot size0.32 ac
SmallerTypical 0.28 acBigger

Bigger than 53% of homes nearby

Year built1954
OlderTypical 1986Newer

Newer than 21% of homes nearby

How 321 Walnut Ln ranks against every home in each area.
MeasureThis homePrinceton 08540Mercer County
Estimated valuepricier than$1,399,00074% of homes96% of homes
Price per ft²pricier than$59483% of homes97% of homes
Living areabigger than2,356 ft²55% of homes80% of homes
Lot sizebigger than0.32 ac53% of homes71% of homes
Year builtnewer than195421% of homes41% of homes

About 321 Walnut Ln

How much is 321 Walnut Ln, Princeton, NJ worth?

The TopHap Estimate for 321 Walnut Ln, Princeton, NJ is $1,399,000 as of Oct 21, 2026. The likely range is $1,346,253 to $1,451,747. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 321 Walnut Ln, Princeton, NJ last sell?

321 Walnut Ln, Princeton, NJ last sold on Oct 28, 2026 for $1,379,800, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 321 Walnut Ln, Princeton, NJ?

321 Walnut Ln, Princeton, NJ has 2,356 square feet of living space and a 0.32-acre lot.

When was 321 Walnut Ln, Princeton, NJ built?

321 Walnut Ln, Princeton, NJ was built in 1954, making it 72 years old. The building has 2 stories.

What schools serve 321 Walnut Ln, Princeton, NJ?

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

How does 321 Walnut Ln, Princeton, NJ compare to other homes in Princeton 08540?

Among the 13,637 homes in Princeton 08540, it is worth more than 74% of them ($1,399,000 against a typical $1,004,601), its price per square foot is higher than 83% of them ($594 against a typical $426), it is bigger than 55% of them (2,356 ft² against a typical 2,258 ft²), its lot is bigger than 53% of them (0.32 ac against a typical 0.28 ac) and it is newer than 21% of them (1954 against a typical 1986). Measured against all of Mercer County, it is worth more than 96% 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 321 Walnut Ln, Princeton, NJ?

The 2025 property tax bill for 321 Walnut Ln, Princeton, NJ was $18,956. The county assessed it at $693,600.

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