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CondominiumResidential

666 Mill St

BELLEVILLE, NJ 07109
1.44 ac
Lot SizeThe size of the land the home sits on, from county records.
1983
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
Built 198326 units1,126–1,126 ft²
$20M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$757K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$673
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+85.8%vs the Belleville ZIP median sale $/ft² ($362)

Sales Performance

$670K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
-22.5%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
3.8%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+4.3%per yeartypical hold 4.8 yrsfrom 7 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20052010201320152017202120232025
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20052010201320152017202120232025

20 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$557K$679K$801K$924K1,126 ft²1,126 ft²1,126 ft²1,126 ft²1,126 ft²1,126 ft²
Studio
Studio
18 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
Studio · 0 ba · 1,126 ft²
18 units
0 ba · 1,126 ft²
8 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$557K–$557K
1 unit
$671K–$671K
1 unit
$697K–$739K
4 units
$746K–$785K
13 units
$807K–$815K
3 units
$843K–$874K
2 units
$912K–$924K
2 units

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.19%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.15%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.13.8 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.40%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.36%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$785,202
Median tax billThe middle annual property tax bill among the building's units.$7,316
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit A6Oct 23, 2025$670,000Unit A12Aug 27, 2025$865,000Unit A9Aug 13, 2024$750,000Unit A9Jul 28, 2023$550,000Unit C2Sep 23, 2022$850,000Unit A10Jun 16, 2021$670,000Unit B8Apr 22, 2021$652,000Unit C2Jun 7, 2018$7,000,000Unit C2Sep 14, 2017$330,000Unit B9Sep 30, 2016$325,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyESSEX
ConstructionThe main material the home's frame and walls are built from.Brick
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.

H
Livingston High SchoolA
High · Grades 9–12 · 0.1 mi
E
Hillside Elementary SchoolA+
Elementary · Grades KG–5 · 0.5 mi
M
Heritage Middle SchoolA+
Middle · Grades 7–8 · 1.2 mi

District: Livingston Township School District

Neighborhood · ZIP 07109These 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.69
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.105
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.115

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.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.8%
PopulationHow many people live in this area.39,272
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.11,528 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$81,531
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$110,448
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

666 Mill St # A1
1,126 ft²
$843K
666 Mill St # B1
1,126 ft²
$746K
666 Mill St # C1
1,126 ft²
$755K
666 Mill St # A2
1,126 ft²
$811K
666 Mill St # B2
1,126 ft²
$756K
666 Mill St # C2
1,126 ft²
$874K
666 Mill St # A3
1,126 ft²
$764K
666 Mill St # B3
1,126 ft²
$756K
666 Mill St # C3
1,126 ft²
$807K
666 Mill St # B4
1,126 ft²
$756K
666 Mill St # A5
1,126 ft²
$912K
666 Mill St # B5
1,126 ft²
$815K
666 Mill St # A6
1,126 ft²
$557K
666 Mill St # B6
1,126 ft²
$756K
666 Mill St # A7
1,126 ft²
$718K
666 Mill St # B7
1,126 ft²
$785K
666 Mill St # A8
1,126 ft²
$739K
666 Mill St # B8
1,126 ft²
$784K
666 Mill St # A9
1,126 ft²
$671K
666 Mill St # B9
1,126 ft²
$705K
666 Mill St # A10
1,126 ft²
$924K
666 Mill St # B10
1,126 ft²
$759K
666 Mill St # A11
1,126 ft²
$746K
666 Mill St # B11
1,126 ft²
$759K
666 Mill St # A12
1,126 ft²
$697K
666 Mill St # B12
1,126 ft²
$759K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 666 Mill St

How many units are in 666 Mill St, Belleville, NJ?

666 Mill St, Belleville, NJ has 26 residential units across built in 1983, according to county assessor records.

What is a unit at 666 Mill St, Belleville, NJ worth?

The median TopHap Estimate across the 26 units at 666 Mill St, Belleville, NJ is $757,307. That works out to $673 per square foot. Units run from 1,126 to 1,126 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 666 Mill St, Belleville, NJ expensive for Belleville?

Units at 666 Mill St, Belleville, NJ carry a median of $673 per square foot, 86% above the Belleville median of $362 per square foot.

How often do units sell at 666 Mill St, Belleville, NJ?

1 units at 666 Mill St, Belleville, NJ sold in the last 12 months, out of 20 recorded arms-length sales all time. That is a turnover rate of 3.8% of the building per year. The median sale over that period was $670K.

Have units at 666 Mill St, Belleville, NJ appreciated?

Across 7 repeat sales of the same unit, 666 Mill St, Belleville, NJ returned a median 4.3% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 4.8 years.

What floor plans does 666 Mill St, Belleville, NJ have?

The most common plan at 666 Mill St, Belleville, NJ is a 0-bedroom of 1,126 square feet, repeated 18 times, with a median estimate of $757,307. TopHap identifies 2 recurring plans in the building.

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