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Residential (General/Single)Residential
$1,924,843$490 / 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 89How 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 UNION AVE

UPPER SADDLE RIVER, NJ 07458
0
Baths
3,931 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.
4.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1968
Year BuiltThe year the home was originally built, according to county records.

Valuation

$1.9M
$1.7M low$2.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$35,729 (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.$1,379,500 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$485,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$894,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,379,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,379,500

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.84 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Residential (General/Single)
CountyBERGEN
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
Robert D. Reynolds Primary School
Elementary · Grades PK–2 · 1.0 mi
M
Emil A. Cavallini Middle SchoolA-
Middle · Grades 6–8 · 1.1 mi
H
Northern Highlands Regional High SchoolA+
High · Grades 9–12 · 2.0 mi

District: Upper Saddle River Borough School District

Neighborhood · ZIP 07458These 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.58
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.113
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.115

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.39%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.6%
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.12,183
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,189 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$213,636
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$289,760
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.51 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 Union 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 96% of homes in Bergen County
  • Costs more per square foot than 72% of homes in Bergen County
  • Bigger than 94% of homes in Bergen County
  • Among the largest lots in Saddle River 07458
  • Newer than 71% of homes in Bergen County

What homes are worth in Saddle River 07458

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

This home
$293K$5M

This home is worth more than 63% of homes in Saddle River 07458.

How it measures up in Saddle River 07458

The dot is this home. The mark in the middle is the typical home in Saddle River 07458.

Estimated value$1,924,843
CheaperTypical $1,554,861Pricier

Pricier than 63% of homes nearby

Price per ft²$490
CheaperTypical $454Pricier

Pricier than 66% of homes nearby

Living area3,931 ft²
SmallerTypical 3,699 ft²Bigger

Bigger than 54% of homes nearby

Lot size4.46 ac
SmallerTypical 0.91 acBigger

Bigger than almost all homes nearby

Year built1968
OlderTypical 1973Newer

Newer than 42% of homes nearby

How 21 Union Ave ranks against every home in each area.
MeasureThis homeSaddle River 07458Bergen County
Estimated valuepricier than$1,924,84363% of homes96% of homes
Price per ft²pricier than$49066% of homes72% of homes
Living areabigger than3,931 ft²54% of homes94% of homes
Lot sizebigger than4.46 acalmost all homesalmost all homes
Year builtnewer than196842% of homes71% of homes

About 21 Union Ave

How much is 21 Union Ave, Upper Saddle River, NJ worth?

The TopHap Estimate for 21 Union Ave, Upper Saddle River, NJ is $1,924,843 as of Sep 24, 2026. The likely range is $1,715,913 to $2,133,773. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Union Ave, Upper Saddle River, NJ last sell?

21 Union Ave, Upper Saddle River, NJ last sold on Jan 1, 1900, according to the county's recorded deed.

When was 21 Union Ave, Upper Saddle River, NJ built?

21 Union Ave, Upper Saddle River, NJ was built in 1968, making it 58 years old.

What schools serve 21 Union Ave, Upper Saddle River, NJ?

21 Union Ave, Upper Saddle River, NJ is assigned to Robert D. Reynolds Primary School (elementary); Emil A. Cavallini Middle School (middle), rated A-; Northern Highlands Regional High School (high), rated A+. All sit in Upper Saddle River Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Union Ave, Upper Saddle River, NJ compare to other homes in Saddle River 07458?

Among the 4,176 homes in Saddle River 07458, it is worth more than 63% of them ($1,924,843 against a typical $1,554,861), its price per square foot is higher than 66% of them ($490 against a typical $454), it is bigger than 54% of them (3,931 ft² against a typical 3,699 ft²), its lot is bigger than almost all of them (4.46 ac against a typical 0.91 ac) and it is newer than 42% of them (1968 against a typical 1973). Measured against all of Bergen 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 21 Union Ave, Upper Saddle River, NJ?

The 2025 property tax bill for 21 Union Ave, Upper Saddle River, NJ was $35,729. The county assessed it at $1,379,500.

More homes on Union Ave

Closest homes

More homes in Upper Saddle River 07458

Assigned schools

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