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Single Family ResidenceResidential
$484,814$405 / 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 90How 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 $435,000 on May 3, 2024

21 SENECA AVE

ROCKAWAY, NJ 07866
0
Baths
1,198 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1959
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$485K
$434K low$535K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$435,000 · May 3, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,497 (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.$412,200 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$265,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$146,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$373,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$412,200

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.0.19
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(2)

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
Stony Brook Elementary SchoolB+
Elementary · Grades KG–5 · 0.3 mi
M
Copeland Middle SchoolC+
Middle · Grades 6–8 · 0.3 mi
H
Morris Hills High SchoolB+
High · Grades 9–12 · 2.0 mi

District: Rockaway Township School District

Neighborhood · ZIP 07866These 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.86
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.101

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.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
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.22,161
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.982 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$116,734
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$149,991
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.53 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 Seneca 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 less than 85% of homes in Morris County
  • Costs more per square foot than 81% of homes in Rockaway 07866
  • Smaller than 87% of homes in Morris County
  • Has a smaller lot than 72% of homes in Morris County

What homes are worth in Rockaway 07866

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

This home
$275K$1M

This home is worth more than 21% of homes in Rockaway 07866.

How it measures up in Rockaway 07866

The dot is this home. The mark in the middle is the typical home in Rockaway 07866.

Estimated value$484,814
CheaperTypical $565,505Pricier

Pricier than 21% of homes nearby

Price per ft²$405
CheaperTypical $339Pricier

Pricier than 81% of homes nearby

Living area1,198 ft²
SmallerTypical 1,644 ft²Bigger

Bigger than 19% of homes nearby

Lot size0.19 ac
SmallerTypical 0.24 acBigger

Bigger than 39% of homes nearby

Year built1959
OlderTypical 1965Newer

Newer than 38% of homes nearby

How 21 Seneca Ave ranks against every home in each area.
MeasureThis homeRockaway 07866Morris County
Estimated valuepricier than$484,81421% of homes15% of homes
Price per ft²pricier than$40581% of homes67% of homes
Living areabigger than1,198 ft²19% of homes13% of homes
Lot sizebigger than0.19 ac39% of homes28% of homes
Year builtnewer than195938% of homes37% of homes

About 21 Seneca Ave

How much is 21 Seneca Ave, Rockaway, NJ worth?

The TopHap Estimate for 21 Seneca Ave, Rockaway, NJ is $484,814 as of Sep 24, 2026. The likely range is $434,172 to $535,456. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Seneca Ave, Rockaway, NJ last sell?

21 Seneca Ave, Rockaway, NJ last sold on May 3, 2024 for $435,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 Seneca Ave, Rockaway, NJ?

21 Seneca Ave, Rockaway, NJ has 1,198 square feet of living space and a 0.19-acre lot.

When was 21 Seneca Ave, Rockaway, NJ built?

21 Seneca Ave, Rockaway, NJ was built in 1959, making it 67 years old. The building has 1 story.

What schools serve 21 Seneca Ave, Rockaway, NJ?

21 Seneca Ave, Rockaway, NJ is assigned to Stony Brook Elementary School (elementary), rated B+; Copeland Middle School (middle), rated C+; Morris Hills High School (high), rated B+. All sit in Rockaway Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Seneca Ave, Rockaway, NJ compare to other homes in Rockaway 07866?

Among the 8,204 homes in Rockaway 07866, it is worth more than 21% of them ($484,814 against a typical $565,505), its price per square foot is higher than 81% of them ($405 against a typical $339), it is bigger than 19% of them (1,198 ft² against a typical 1,644 ft²), its lot is bigger than 39% of them (0.19 ac against a typical 0.24 ac) and it is newer than 38% of them (1959 against a typical 1965). Measured against all of Morris County, it is worth more than 15% 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 Seneca Ave, Rockaway, NJ?

The 2024 property tax bill for 21 Seneca Ave, Rockaway, NJ was $8,497. The county assessed it at $412,200.

More homes on Seneca Ave

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Assigned schools

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