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Single Family ResidenceResidential
$735,000$321 / 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 88How 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

21 OLD RIVER RD

LAMBERTVILLE, NJ 08530
0
Baths
2,287 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.
4.45 ac
Lot SizeThe size of the land the home sits on, from county records.
1790
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$735K
$644K low$826K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,719 (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.$513,200 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$165,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$347,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$503,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$513,200

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyHUNTERDON
Lot (acres)The size of the land the home sits on, from county records.4.45
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
South Hunterdon Regional Elementary SchoolC
Elementary · Grades PK–4 · 2.3 mi
M
South Hunterdon Regional Middle School
Middle · Grades 5–8 · 3.7 mi
H
South Hunterdon Regional High SchoolC-
High · Grades 9–12 · 4.0 mi

District: South Hunterdon Regional School District

Neighborhood · ZIP 08530These 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.130
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.82

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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.7,509
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.296 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$124,489
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$174,197
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 Old River Rd 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 70% of homes in Lambertville 08530
  • Costs more per square foot than 70% of homes in Hunterdon County
  • Bigger than 69% of homes in Lambertville 08530
  • Has a bigger lot than 94% of homes in Lambertville 08530
  • Among the oldest homes in Lambertville 08530

What homes are worth in Lambertville 08530

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

This home
$308K$1.2M

This home is worth more than 70% of homes in Lambertville 08530.

How it measures up in Lambertville 08530

The dot is this home. The mark in the middle is the typical home in Lambertville 08530.

Estimated value$735,000
CheaperTypical $602,064Pricier

Pricier than 70% of homes nearby

Price per ft²$321
CheaperTypical $326Pricier

Pricier than 48% of homes nearby

Living area2,287 ft²
SmallerTypical 1,830 ft²Bigger

Bigger than 69% of homes nearby

Lot size4.45 ac
SmallerTypical 0.18 acBigger

Bigger than 94% of homes nearby

Year built1790
OlderTypical 1957Newer

Older than almost all homes nearby

How 21 Old River Rd ranks against every home in each area.
MeasureThis homeLambertville 08530Hunterdon County
Estimated valuepricier than$735,00070% of homes68% of homes
Price per ft²pricier than$32148% of homes70% of homes
Living areabigger than2,287 ft²69% of homes58% of homes
Lot sizebigger than4.45 ac94% of homes90% of homes
Year builtnewer than1790almost no homesalmost no homes

About 21 Old River Rd

How much is 21 Old River Rd, Lambertville, NJ worth?

The TopHap Estimate for 21 Old River Rd, Lambertville, NJ is $735,000 as of Sep 24, 2026. The likely range is $643,672 to $826,328. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Old River Rd, Lambertville, NJ last sell?

21 Old River Rd, Lambertville, NJ last sold on Sep 18, 2026, according to the county's recorded deed.

How big is 21 Old River Rd, Lambertville, NJ?

21 Old River Rd, Lambertville, NJ has 2,287 square feet of living space and a 4.45-acre lot.

When was 21 Old River Rd, Lambertville, NJ built?

21 Old River Rd, Lambertville, NJ was built in 1790, making it 236 years old. The building has 2 stories.

What schools serve 21 Old River Rd, Lambertville, NJ?

21 Old River Rd, Lambertville, NJ is assigned to South Hunterdon Regional Elementary School (elementary), rated C; South Hunterdon Regional Middle School (middle); South Hunterdon Regional High School (high), rated C-. All sit in South Hunterdon Regional School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Old River Rd, Lambertville, NJ compare to other homes in Lambertville 08530?

Among the 2,767 homes in Lambertville 08530, it is worth more than 70% of them ($735,000 against a typical $602,064), its price per square foot is higher than 48% of them ($321 against a typical $326), it is bigger than 69% of them (2,287 ft² against a typical 1,830 ft²), its lot is bigger than 94% of them (4.45 ac against a typical 0.18 ac) and it is newer than almost none of them (1790 against a typical 1957). Measured against all of Hunterdon County, it is worth more than 68% 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 Old River Rd, Lambertville, NJ?

The 2025 property tax bill for 21 Old River Rd, Lambertville, NJ was $10,719. The county assessed it at $513,200.

More homes on Old River Rd

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