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Residential (General/Single)Residential
$995,192$540 / 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 91How 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 $180,000 on Sep 8, 1994

21 KNOX AVE

CLIFFSIDE PARK, NJ 07010
0
Baths
1,844 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1912
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$995K
$908K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$180,000 · Sep 8, 1994

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,558 (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.$442,800 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$320,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$122,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$442,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$442,800

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Residential (General/Single)
CountyBERGEN
Lot (acres)The size of the land the home sits on, from county records.0.14
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
School #4B
Elementary · Grades PK–6 · 0.4 mi
H
Cliffside Park High SchoolD+
High · Grades 9–12 · 0.5 mi
M
School #6B-
Middle · Grades KG–8 · 0.7 mi

District: Cliffside Park Borough School District

Neighborhood · ZIP 07010These 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.136
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.118
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.112

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.26,228
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.27,301 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$89,663
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$118,344
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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 Knox Ave 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 86% of homes in Cliffside Park 07010
  • Costs more per square foot than 90% of homes in Cliffside Park 07010
  • Has a bigger lot than 94% of homes in Cliffside Park 07010
  • Older than 96% of homes in Cliffside Park 07010

What homes are worth in Cliffside Park 07010

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

This home
$318K$1.5M

This home is worth more than 86% of homes in Cliffside Park 07010.

How it measures up in Cliffside Park 07010

The dot is this home. The mark in the middle is the typical home in Cliffside Park 07010.

Estimated value$995,192
CheaperTypical $658,855Pricier

Pricier than 86% of homes nearby

Price per ft²$540
CheaperTypical $418Pricier

Pricier than 90% of homes nearby

Living area1,844 ft²
SmallerTypical 1,615 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.14 ac
SmallerTypical 2,134 ft²Bigger

Bigger than 94% of homes nearby

Year built1912
OlderTypical 1974Newer

Newer than 4% of homes nearby

How 21 Knox Ave ranks against every home in each area.
MeasureThis homeCliffside Park 07010Bergen County
Estimated valuepricier than$995,19286% of homes71% of homes
Price per ft²pricier than$54090% of homes84% of homes
Living areabigger than1,844 ft²61% of homes50% of homes
Lot sizebigger than0.14 ac94% of homes42% of homes
Year builtnewer than19124% of homes6% of homes

About 21 Knox Ave

How much is 21 Knox Ave, Cliffside Park, NJ worth?

The TopHap Estimate for 21 Knox Ave, Cliffside Park, NJ is $995,192 as of Sep 24, 2026. The likely range is $908,052 to $1,082,332. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Knox Ave, Cliffside Park, NJ last sell?

21 Knox Ave, Cliffside Park, NJ last sold on Sep 8, 1994 for $180,000, according to the county's recorded deed.

How big is 21 Knox Ave, Cliffside Park, NJ?

21 Knox Ave, Cliffside Park, NJ has 1,844 square feet of living space and a 0.14-acre lot.

When was 21 Knox Ave, Cliffside Park, NJ built?

21 Knox Ave, Cliffside Park, NJ was built in 1912, making it 114 years old. The building has 2 stories.

What schools serve 21 Knox Ave, Cliffside Park, NJ?

21 Knox Ave, Cliffside Park, NJ is assigned to School #4 (elementary), rated B; Cliffside Park High School (high), rated D+; School #6 (middle), rated B-. All sit in Cliffside Park Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Knox Ave, Cliffside Park, NJ compare to other homes in Cliffside Park 07010?

Among the 7,091 homes in Cliffside Park 07010, it is worth more than 86% of them ($995,192 against a typical $658,855), its price per square foot is higher than 90% of them ($540 against a typical $418), it is bigger than 61% of them (1,844 ft² against a typical 1,615 ft²), its lot is bigger than 94% of them (0.14 ac against a typical 2,134 ft²) and it is newer than 4% of them (1912 against a typical 1974). Measured against all of Bergen County, it is worth more than 71% 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 Knox Ave, Cliffside Park, NJ?

The 2025 property tax bill for 21 Knox Ave, Cliffside Park, NJ was $12,558. The county assessed it at $442,800.

More homes on Knox Ave

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More homes in Cliffside Park 07010

Assigned schools

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