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Single Family ResidenceResidential
$437,413$130 / 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 74How 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 $165,000 on Dec 21, 2012

21 MAIN ST

CALIFON, NJ 07830
0
Baths
3,353 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.
1920
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$437K
$323K low$552K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$165,000 · Dec 21, 2012

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$20,904 (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.$536,400 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$127,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$408,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$536,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$536,400

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.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

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
Califon Elementary SchoolC+
Elementary · Grades PK–8 · 0.6 mi
H
Voorhees High SchoolB
High · Grades 9–12 · 3.0 mi

District: Califon Borough School District

Neighborhood · ZIP 07830These 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.82
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.88

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.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.6,640
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.248 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$160,173
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$193,781
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.52 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 Main 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 less than 91% of homes in Califon 07830
  • Among the lowest price per square foot in Califon 07830
  • Bigger than 86% of homes in Hunterdon County
  • Has a smaller lot than 84% of homes in Califon 07830
  • Older than 87% of homes in Hunterdon County

What homes are worth in Califon 07830

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

This home
$343K$1.6M

This home is worth more than 9% of homes in Califon 07830.

How it measures up in Califon 07830

The dot is this home. The mark in the middle is the typical home in Califon 07830.

Estimated value$437,413
CheaperTypical $731,197Pricier

Pricier than 9% of homes nearby

Price per ft²$130
CheaperTypical $306Pricier

Cheaper than almost all homes nearby

Living area3,353 ft²
SmallerTypical 2,428 ft²Bigger

Bigger than 74% of homes nearby

Lot size0.5 ac
SmallerTypical 2.02 acBigger

Bigger than 16% of homes nearby

Year built1920
OlderTypical 1973Newer

Newer than 16% of homes nearby

How 21 Main St ranks against every home in each area.
MeasureThis homeCalifon 07830Hunterdon County
Estimated valuepricier than$437,4139% of homes21% of homes
Price per ft²pricier than$130almost no homesalmost no homes
Living areabigger than3,353 ft²74% of homes86% of homes
Lot sizebigger than0.5 ac16% of homes34% of homes
Year builtnewer than192016% of homes13% of homes

About 21 Main St

How much is 21 Main St, Califon, NJ worth?

The TopHap Estimate for 21 Main St, Califon, NJ is $437,413 as of Sep 24, 2026. The likely range is $322,702 to $552,124. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Main St, Califon, NJ last sell?

21 Main St, Califon, NJ last sold on Dec 21, 2012 for $165,000, according to the county's recorded deed.

How big is 21 Main St, Califon, NJ?

21 Main St, Califon, NJ has 3,353 square feet of living space and a 0.50-acre lot.

When was 21 Main St, Califon, NJ built?

21 Main St, Califon, NJ was built in 1920, making it 106 years old. The building has 2 stories.

What schools serve 21 Main St, Califon, NJ?

21 Main St, Califon, NJ is assigned to Califon Elementary School (elementary), rated C+; Voorhees High School (high), rated B. All sit in Califon Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Main St, Califon, NJ compare to other homes in Califon 07830?

Among the 2,158 homes in Califon 07830, it is worth more than 9% of them ($437,413 against a typical $731,197), its price per square foot is higher than almost none of them ($130 against a typical $306), it is bigger than 74% of them (3,353 ft² against a typical 2,428 ft²), its lot is bigger than 16% of them (0.5 ac against a typical 2.02 ac) and it is newer than 16% of them (1920 against a typical 1973). Measured against all of Hunterdon County, it is worth more than 21% 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 Main St, Califon, NJ?

The 2025 property tax bill for 21 Main St, Califon, NJ was $20,904. The county assessed it at $536,400.

More homes on Main St

Closest homes

More homes in Califon 07830

Assigned schools

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