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Single Family ResidenceResidential
$1,027,555$389 / 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 96How 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 $490,000 on Apr 13, 2000

21 MENDHAM RD

GLADSTONE, NJ 07934
0
Baths
2,640 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.
0.85 ac
Lot SizeThe size of the land the home sits on, from county records.
1927
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$1M
$984K 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.$490,000 · Apr 13, 2000

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,826 (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.$869,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$281,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$587,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$813,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$869,000

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.46
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
22
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
67
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
97
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
43
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.minimal

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
CountySOMERSET
Lot (acres)The size of the land the home sits on, from county records.0.85
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(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.

Foreclosure Filings(2)

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

M
Bernardsville Middle SchoolA
Middle · Grades 5–8 · 5.0 mi
E
Marion T. Bedwell Elementary SchoolB
Elementary · Grades PK–4 · 5.0 mi
H
Bernards High SchoolA-
High · Grades 9–12 · 5.2 mi

District: Somerset Hills Regional School District

Neighborhood · ZIP 07934These 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.101
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.97

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.40%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.1%
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.1,582
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.334 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$157,213
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$264,195
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 Mendham 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 Somerset County
  • Costs more per square foot than 70% of homes in Somerset County
  • Bigger than 74% of homes in Somerset County
  • Has a bigger lot than 75% of homes in Somerset County
  • Older than 92% of homes in Somerset County

What homes are worth in Gladstone 07934

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

This home
$571K$2.2M

This home is worth more than 47% of homes in Gladstone 07934.

How it measures up in Gladstone 07934

The dot is this home. The mark in the middle is the typical home in Gladstone 07934.

Estimated value$1,027,555
CheaperTypical $1,052,566Pricier

Pricier than 47% of homes nearby

Price per ft²$389
CheaperTypical $407Pricier

Pricier than 33% of homes nearby

Living area2,640 ft²
SmallerTypical 2,695 ft²Bigger

Bigger than 48% of homes nearby

Lot size0.85 ac
SmallerTypical 1.03 acBigger

Bigger than 46% of homes nearby

Year built1927
OlderTypical 1972Newer

Newer than 23% of homes nearby

How 21 Mendham Rd ranks against every home in each area.
MeasureThis homeGladstone 07934Somerset County
Estimated valuepricier than$1,027,55547% of homes81% of homes
Price per ft²pricier than$38933% of homes70% of homes
Living areabigger than2,640 ft²48% of homes74% of homes
Lot sizebigger than0.85 ac46% of homes75% of homes
Year builtnewer than192723% of homes8% of homes

About 21 Mendham Rd

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

The TopHap Estimate for 21 Mendham Rd, Gladstone, NJ is $1,027,555 as of Sep 24, 2026. The likely range is $983,737 to $1,071,373. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

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

21 Mendham Rd, Gladstone, NJ last sold on Apr 13, 2000 for $490,000, according to the county's recorded deed.

How big is 21 Mendham Rd, Gladstone, NJ?

21 Mendham Rd, Gladstone, NJ has 2,640 square feet of living space and a 0.85-acre lot.

When was 21 Mendham Rd, Gladstone, NJ built?

21 Mendham Rd, Gladstone, NJ was built in 1927, making it 99 years old. The building has 2 stories.

What schools serve 21 Mendham Rd, Gladstone, NJ?

21 Mendham Rd, Gladstone, NJ is assigned to Bernardsville Middle School (middle), rated A; Marion T. Bedwell Elementary School (elementary), rated B; Bernards High School (high), rated A-. All sit in Somerset Hills Regional School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Mendham Rd, Gladstone, NJ compare to other homes in Gladstone 07934?

Among the 453 homes in Gladstone 07934, it is worth more than 47% of them ($1,027,555 against a typical $1,052,566), its price per square foot is higher than 33% of them ($389 against a typical $407), it is bigger than 48% of them (2,640 ft² against a typical 2,695 ft²), its lot is bigger than 46% of them (0.85 ac against a typical 1.03 ac) and it is newer than 23% of them (1927 against a typical 1972). Measured against all of Somerset 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 Mendham Rd, Gladstone, NJ?

The 2025 property tax bill for 21 Mendham Rd, Gladstone, NJ was $12,826. The county assessed it at $869,000.

More homes on Mendham Rd

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