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Single Family ResidenceResidential
$1,591,525$301 / 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 Jul 14, 2026
Last sold for $627,000 on Jul 22, 1999

18 PROSPECT ST

MENDHAM, NJ 07945
0
Baths
5,285 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.
1.6 ac
Lot SizeThe size of the land the home sits on, from county records.
1894
Year BuiltThe year the home was originally built, according to county records.

Valuation

$1.6M
$1.5M low$1.7M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$627,000 · Jul 22, 1999
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$1,591,525
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$1,273,220

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$28,809 (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.$1,171,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$345,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$825,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,171,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,171,100

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

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

E
Hilltop SchoolB+
Elementary · Grades PK–4 · 0.3 mi
M
Mountain View SchoolA
Middle · Grades 5–8 · 0.6 mi
H
West Morris Mendham High SchoolA+
High · Grades 9–12 · 0.8 mi

District: Mendham Borough 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

18 Prospect St 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 95% of homes in Morris County
  • Costs less per square foot than 95% of homes in Mendham 07945
  • Among the largest homes in Morris County
  • Has a bigger lot than 91% of homes in Morris County
  • Older than 98% 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
$587K$2.7M

This home is worth more than 82% 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$1,591,525
CheaperTypical $1,118,394Pricier

Pricier than 82% of homes nearby

Price per ft²$301
CheaperTypical $397Pricier

Pricier than 5% of homes nearby

Living area5,285 ft²
SmallerTypical 2,804 ft²Bigger

Bigger than 91% of homes nearby

Lot size1.6 ac
SmallerTypical 1.03 acBigger

Bigger than 67% of homes nearby

Year built1894
OlderTypical 1973Newer

Newer than 3% of homes nearby

How 18 Prospect St ranks against every home in each area.
MeasureThis homeMendham 07945Morris County
Estimated valuepricier than$1,591,52582% of homes95% of homes
Price per ft²pricier than$3015% of homes20% of homes
Living areabigger than5,285 ft²91% of homesalmost all homes
Lot sizebigger than1.6 ac67% of homes91% of homes
Year builtnewer than18943% of homes2% of homes

About 18 Prospect St

How much is 18 Prospect St, Mendham, NJ worth?

The TopHap Estimate for 18 Prospect St, Mendham, NJ is $1,591,525 as of Jul 14, 2026. The likely range is $1,471,087 to $1,711,963. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Prospect St, Mendham, NJ last sell?

18 Prospect St, Mendham, NJ last sold on Jul 22, 1999 for $627,000, according to the county's recorded deed.

When was 18 Prospect St, Mendham, NJ built?

18 Prospect St, Mendham, NJ was built in 1894, making it 132 years old.

What schools serve 18 Prospect St, Mendham, NJ?

18 Prospect St, Mendham, NJ is assigned to Hilltop School (elementary), rated B+; Mountain View School (middle), rated A; West Morris Mendham High School (high), rated A+. All sit in Mendham Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Prospect St, Mendham, NJ compare to other homes in Mendham 07945?

Among the 3,208 homes in Mendham 07945, it is worth more than 82% of them ($1,591,525 against a typical $1,118,394), its price per square foot is higher than 5% of them ($301 against a typical $397), it is bigger than 91% of them (5,285 ft² against a typical 2,804 ft²), its lot is bigger than 67% of them (1.6 ac against a typical 1.03 ac) and it is newer than 3% of them (1894 against a typical 1973). Measured against all of Morris County, it is worth more than 95% 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 18 Prospect St, Mendham, NJ?

The 2024 property tax bill for 18 Prospect St, Mendham, NJ was $28,809. The county assessed it at $1,171,100.

Closest homes

More homes in Mendham 07945

Assigned schools

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