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Single Family ResidenceResidential
$584,176$417 / 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 93How 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 COTTAGE PL

RIVERDALE, NJ 07457
0
Baths
1,400 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.
0.34 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$584K
$543K low$626K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,442 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$489,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$284,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$205,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$462,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$489,700

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.21 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyMORRIS
Lot (acres)The size of the land the home sits on, from county records.0.34
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

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Riverdale SchoolB
Elementary · Grades PK–8 · 0.4 mi
H
Pompton Lakes High SchoolC+
High · Grades 9–12 · 1.4 mi

District: Pompton Lakes Borough School District

Neighborhood · ZIP 07457These 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.122
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.98
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.111

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.97%
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.7.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.4,349
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,040 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$106,711
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$118,876
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.50 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 Cottage Pl 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 73% of homes in Riverdale 07457
  • Costs more per square foot than 71% of homes in Morris County
  • Smaller than 78% of homes in Morris County
  • Has a bigger lot than 83% of homes in Riverdale 07457
  • Older than 70% of homes in Riverdale 07457

What homes are worth in Riverdale 07457

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

This home
$309K$1.1M

This home is worth more than 73% of homes in Riverdale 07457.

How it measures up in Riverdale 07457

The dot is this home. The mark in the middle is the typical home in Riverdale 07457.

Estimated value$584,176
CheaperTypical $513,950Pricier

Pricier than 73% of homes nearby

Price per ft²$417
CheaperTypical $382Pricier

Pricier than 60% of homes nearby

Living area1,400 ft²
SmallerTypical 1,308 ft²Bigger

Bigger than 58% of homes nearby

Lot size0.34 ac
SmallerTypical 0.13 acBigger

Bigger than 83% of homes nearby

Year built1956
OlderTypical 2000Newer

Newer than 30% of homes nearby

How 21 Cottage Pl ranks against every home in each area.
MeasureThis homeRiverdale 07457Morris County
Estimated valuepricier than$584,17673% of homes30% of homes
Price per ft²pricier than$41760% of homes71% of homes
Living areabigger than1,400 ft²58% of homes22% of homes
Lot sizebigger than0.34 ac83% of homes48% of homes
Year builtnewer than195630% of homes33% of homes

About 21 Cottage Pl

How much is 21 Cottage Pl, Riverdale, NJ worth?

The TopHap Estimate for 21 Cottage Pl, Riverdale, NJ is $584,176 as of Sep 24, 2026. The likely range is $542,563 to $625,789. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Cottage Pl, Riverdale, NJ last sell?

21 Cottage Pl, Riverdale, NJ last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Cottage Pl, Riverdale, NJ?

21 Cottage Pl, Riverdale, NJ has 1,400 square feet of living space and a 0.34-acre lot.

When was 21 Cottage Pl, Riverdale, NJ built?

21 Cottage Pl, Riverdale, NJ was built in 1956, making it 70 years old. The building has 1 story.

What schools serve 21 Cottage Pl, Riverdale, NJ?

21 Cottage Pl, Riverdale, NJ is assigned to Riverdale School (elementary), rated B; Pompton Lakes High School (high), rated C+. All sit in Pompton Lakes Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Cottage Pl, Riverdale, NJ compare to other homes in Riverdale 07457?

Among the 1,662 homes in Riverdale 07457, it is worth more than 73% of them ($584,176 against a typical $513,950), its price per square foot is higher than 60% of them ($417 against a typical $382), it is bigger than 58% of them (1,400 ft² against a typical 1,308 ft²), its lot is bigger than 83% of them (0.34 ac against a typical 0.13 ac) and it is newer than 30% of them (1956 against a typical 2000). Measured against all of Morris County, it is worth more than 30% 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 Cottage Pl, Riverdale, NJ?

The 2024 property tax bill for 21 Cottage Pl, Riverdale, NJ was $8,442. The county assessed it at $489,700.

More homes on Cottage Pl

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