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Single Family ResidenceResidential
$1,256,786$521 / 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 83How 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 $1,200,000 on Feb 26, 2026

23 WILLIAM ST

SUMMIT, NJ 07901
0
Baths
2,410 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1921
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$1.3M
$1M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,200,000 · Feb 26, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,176 (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.$227,600 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$107,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$120,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$227,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$227,600

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyUNION
Lot (acres)The size of the land the home sits on, from county records.0.11
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(3)

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.

M
Lawton C. Johnson Summit Middle SchoolA-
Middle · Grades 6–8 · 0.2 mi
E
Brayton Elementary SchoolA+
Elementary · Grades 1–5 · 0.5 mi
H
Summit High SchoolA+
High · Grades 9–12 · 1.0 mi

District: Summit City School District

Neighborhood · ZIP 07901These 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.55
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.95
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.110

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.24,077
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,885 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$187,703
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$262,118
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

23 William 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 91% of homes in Union County
  • Costs more per square foot than 82% of homes in Union County
  • Bigger than 75% of homes in Union County
  • Has a smaller lot than 95% of homes in Summit 07901
  • Older than 84% of homes in Union County

What homes are worth in Summit 07901

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

This home
$466K$4.2M

This home is worth more than 47% of homes in Summit 07901.

How it measures up in Summit 07901

The dot is this home. The mark in the middle is the typical home in Summit 07901.

Estimated value$1,256,786
CheaperTypical $1,332,672Pricier

Pricier than 47% of homes nearby

Price per ft²$521
CheaperTypical $622Pricier

Pricier than 26% of homes nearby

Living area2,410 ft²
SmallerTypical 2,286 ft²Bigger

Bigger than 55% of homes nearby

Lot size0.11 ac
SmallerTypical 0.29 acBigger

Bigger than 5% of homes nearby

Year built1921
OlderTypical 1951Newer

Newer than 17% of homes nearby

How 23 William St ranks against every home in each area.
MeasureThis homeSummit 07901Union County
Estimated valuepricier than$1,256,78647% of homes91% of homes
Price per ft²pricier than$52126% of homes82% of homes
Living areabigger than2,410 ft²55% of homes75% of homes
Lot sizebigger than0.11 ac5% of homes27% of homes
Year builtnewer than192117% of homes16% of homes

About 23 William St

How much is 23 William St, Summit, NJ worth?

The TopHap Estimate for 23 William St, Summit, NJ is $1,256,786 as of Sep 24, 2026. The likely range is $1,040,971 to $1,472,601. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 23 William St, Summit, NJ last sell?

23 William St, Summit, NJ last sold on Feb 26, 2026 for $1,200,000, according to the county's recorded deed.

How big is 23 William St, Summit, NJ?

23 William St, Summit, NJ has 2,410 square feet of living space and a 0.11-acre lot.

When was 23 William St, Summit, NJ built?

23 William St, Summit, NJ was built in 1921, making it 105 years old. It is a cape cod home. The building has 2 stories.

What schools serve 23 William St, Summit, NJ?

23 William St, Summit, NJ is assigned to Lawton C. Johnson Summit Middle School (middle), rated A-; Brayton Elementary School (elementary), rated A+; Summit High School (high), rated A+. All sit in Summit City School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 23 William St, Summit, NJ compare to other homes in Summit 07901?

Among the 6,689 homes in Summit 07901, it is worth more than 47% of them ($1,256,786 against a typical $1,332,672), its price per square foot is higher than 26% of them ($521 against a typical $622), it is bigger than 55% of them (2,410 ft² against a typical 2,286 ft²), its lot is bigger than 5% of them (0.11 ac against a typical 0.29 ac) and it is newer than 17% of them (1921 against a typical 1951). Measured against all of Union County, it is worth more than 91% 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 23 William St, Summit, NJ?

The 2025 property tax bill for 23 William St, Summit, NJ was $10,176. The county assessed it at $227,600.

More homes on William St

Closest homes

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Assigned schools

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