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Single Family ResidenceResidential
$1,044,610$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 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $753,500 on Sep 11, 2017

21 MOUNTAINSIDE RD

MENDHAM, NJ 07945
0
Baths
2,506 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.
3.01 ac
Lot SizeThe size of the land the home sits on, from county records.
1972
Year BuiltThe year the home was originally built, according to county records.

Valuation

$1M
$965K 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.$753,500 · Sep 11, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$14,493 (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.$867,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$372,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$494,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$801,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$867,000

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.45
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
19
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
63
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
98
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
47
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
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
Mendham Township Elementary SchoolA+
Elementary · Grades PK–4 · 1.0 mi
H
West Morris Mendham High SchoolA-
High · Grades 9–12 · 1.1 mi
M
Mendham Township Middle SchoolA+
Middle · Grades 5–8 · 2.1 mi

District: Mendham Township School District

Neighborhood · ZIP 07945These 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.88
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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.41%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.1%
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.10,295
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.510 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$212,259
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$270,274
Average tempThe average temperature here across a full year.50°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 Mountainside Rd 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 81% of homes in Morris County
  • Costs more per square foot than 70% of homes in Morris County
  • Bigger than 70% of homes in Morris County
  • Has a bigger lot than 96% of homes in Morris County

What homes are worth in Mendham 07945

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

This home
$516K$2.6M

This home is worth more than 42% of homes in Mendham 07945.

How it measures up in Mendham 07945

The dot is this home. The mark in the middle is the typical home in Mendham 07945.

Estimated value$1,044,610
CheaperTypical $1,110,141Pricier

Pricier than 42% of homes nearby

Price per ft²$417
CheaperTypical $395Pricier

Pricier than 63% of homes nearby

Living area2,506 ft²
SmallerTypical 2,796 ft²Bigger

Bigger than 40% of homes nearby

Lot size3.01 ac
SmallerTypical 1.03 acBigger

Bigger than 80% of homes nearby

Year built1972
OlderTypical 1973Newer

Newer than 48% of homes nearby

How 21 Mountainside Rd ranks against every home in each area.
MeasureThis homeMendham 07945Morris County
Estimated valuepricier than$1,044,61042% of homes81% of homes
Price per ft²pricier than$41763% of homes70% of homes
Living areabigger than2,506 ft²40% of homes70% of homes
Lot sizebigger than3.01 ac80% of homes96% of homes
Year builtnewer than197248% of homes57% of homes

About 21 Mountainside Rd

How much is 21 Mountainside Rd, Mendham, NJ worth?

The TopHap Estimate for 21 Mountainside Rd, Mendham, NJ is $1,044,610 as of Oct 21, 2026. The likely range is $965,352 to $1,123,868. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Mountainside Rd, Mendham, NJ last sell?

21 Mountainside Rd, Mendham, NJ last sold on Sep 11, 2017 for $753,500, according to the county's recorded deed.

When was 21 Mountainside Rd, Mendham, NJ built?

21 Mountainside Rd, Mendham, NJ was built in 1972, making it 54 years old.

What schools serve 21 Mountainside Rd, Mendham, NJ?

21 Mountainside Rd, Mendham, NJ is assigned to Mendham Township Elementary School (elementary), rated A+; West Morris Mendham High School (high), rated A-; Mendham Township Middle School (middle), rated A+. All sit in Mendham Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Mountainside Rd, Mendham, NJ compare to other homes in Mendham 07945?

Among the 3,209 homes in Mendham 07945, it is worth more than 42% of them ($1,044,610 against a typical $1,110,141), its price per square foot is higher than 63% of them ($417 against a typical $395), it is bigger than 40% of them (2,506 ft² against a typical 2,796 ft²), its lot is bigger than 80% of them (3.01 ac against a typical 1.03 ac) and it is newer than 48% of them (1972 against a typical 1973). Measured against all of Morris County, it is worth more than 81% 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 Mountainside Rd, Mendham, NJ?

The 2024 property tax bill for 21 Mountainside Rd, Mendham, NJ was $14,493. The county assessed it at $867,000.

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Assigned schools

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