Mountainside
Property Data

Union County, New Jersey

Explore accurate parcel and ownership records,
directly sourced from county assessors.

Union County

ZIP Codesby Total Population

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Total Population
7,0497,049

DistributionTotal Population

No data available

Demographics

Total Population

7,049

Median Age

48.0

Population Under 18

21.8%

Population 65+

24.2%

Total Households

2,508

Average Household Size

2.76

Mountainside, NJ housing and demographic statistics

ZIP/ZCTA areas can cross city and county boundaries. Each row describes its ZIP/ZCTA area, not the city as a whole. These values are not combined into a city estimate.

Individual ZIP/ZCTA estimates associated with Mountainside, NJ
ZIP/ZCTAPopulationMedian household incomeMedian monthly gross rentOwner-occupied share
070927,049$211,538$3,50187.9%

Source: U.S. Census Bureau American Community Survey (ACS), 2020–2024 five-year estimates, via Realie. Measurement period: –. Published by the Census Bureau on ; published by Realie on . These are five-year estimates, not a measurement of current conditions. — indicates unavailable or suppressed data.

Area property statistics

Recorded property characteristics and residential parcel-sale records for Mountainside, NJ. Sale amounts describe recorded transfers, not asking prices or appraisals. Each measure uses records with that information available.

Sale records use the AVM's residential, amount, floor-area, year-built, price-per-area, deed, buyer-relationship and distress filters. Known multi-parcel deals are also excluded. Unknown package flags are not proof of a single-parcel sale. Counts represent eligible parcel sale records. Recorded annual averages require at least 10 eligible sales. Projections must have enough history and pass checks against earlier recorded sales. Recent sales can be underreported; different coverage between years can affect the changes.

City measurements cover the selected county's portion of the city.

Annual sales comparison

Calendar 2025 recorded sales versus calendar 2026 model projections. Both years cover January 1–December 31. Change compares the 2026 projection with the recorded 2025 value. Annual average amounts weight each month by its sales count; they are not monthly medians.

Calendar-year sales comparison
Metric20252026 projectedChange (%)
Residential sale records48Recorded——
Average recorded sale amount$1,111,035Recorded——

Projections are not confirmed transactions or property valuations. Recent sales can be underreported; different coverage between years can affect the change. Unsupported values remain unavailable. Ranges reflect historical model errors, not confidence intervals. Annual comparison calculated . Assumed observation cutoff: May 2026; not verified completeness.

Recorded property statistics

Reported property statistics for Mountainside, NJ
MeasureMountainside, NJUnion County, NJ
Median recorded sale amount$1,000,000$665,000
Recorded amount, 10th percentile$749,300$385,000
Recorded amount, 90th percentile$1,697,330$1,460,000
Average recorded floor area (sq ft)2,5642,152
Average recorded bedrooms3.83.5
Average recorded bathrooms2.52.1
Median year built19561950
Condominium share of properties0.1%1.8%

Mountainside, NJ: Recorded median and percentile amounts: May 7, 2025–Oct 28, 2026.

County input file published Oct 22, 2026. Calculated . Published . Dataset last refreshed: .

Union County, NJ: Recorded median and percentile amounts: May 7, 2025–Oct 28, 2026.

County input file published Oct 22, 2026. Calculated . Published . Dataset last refreshed: .

Source: Realie property-record aggregates. Input publication and calculation dates do not establish complete transaction coverage. Missing measures are shown as — or omitted.

Other recent-period estimates

These use different periods from the calendar-year comparison. Estimates extend parcel-record counts and recorded amounts; they are not confirmed current transactions or individual-property values.

No supported recent-period estimates are available for this area. Recorded statistics above remain available.

Transaction coverage has not been verified. Known multi-parcel deals are excluded; missing package flags do not establish that every remaining sale covers one parcel. Amount change compares monthly record medians, not the appreciation of the same homes. Ranges reflect historical model errors; they are not confidence intervals and can exclude the point estimate. Assumed observation cutoff: May 2026; not a verified completeness date.

Properties in Mountainside

Showing page 14 of properties

1224 Poplar Avenue

Mountainside, NJ 07092

1224 Us Highway 22

Mountainside, NJ 07092

1225 Poplar Avenue

Mountainside, NJ 07092

1226 Beech Avenue

Mountainside, NJ 07092

1226 Cedar Avenue

Mountainside, NJ 07092

1229 Beech Avenue

Mountainside, NJ 07092

1229 Cedar Avenue

Mountainside, NJ 07092

1229 Poplar Avenue

Mountainside, NJ 07092

1229 Us Highway 22

Mountainside, NJ 07092

123 Mountainview Drive

Mountainside, NJ 07092

123 New Providence Road

Mountainside, NJ 07092

123 Parkway

Mountainside, NJ 07092

1230 Poplar Avenue

Mountainside, NJ 07092

1230 Us Highway 22

Mountainside, NJ 07092

1231 Beech Avenue

Mountainside, NJ 07092

1233 Poplar Avenue

Mountainside, NJ 07092

1234 Beech Avenue

Mountainside, NJ 07092

1234 Cedar Avenue

Mountainside, NJ 07092

1234 Poplar Avenue

Mountainside, NJ 07092

1235 Cedar Avenue

Mountainside, NJ 07092

1235 Us Highway 22

Mountainside, NJ 07092

1235 Wood Valley Road

Mountainside, NJ 07092

1236 Beech Avenue

Mountainside, NJ 07092

1236 Poplar Avenue

Mountainside, NJ 07092

1237 Poplar Avenue

Mountainside, NJ 07092

1238 Beech Avenue

Mountainside, NJ 07092

1238 Cedar Avenue

Mountainside, NJ 07092

1238 Poplar Avenue

Mountainside, NJ 07092

1239 Poplar Avenue

Mountainside, NJ 07092

1239 Us Highway 22

Mountainside, NJ 07092

124 Parkway

Mountainside, NJ 07092

1241 Knollwood Road

Mountainside, NJ 07092

1241 Poplar Avenue

Mountainside, NJ 07092

1241 Wood Valley Road

Mountainside, NJ 07092

1242 Beech Avenue

Mountainside, NJ 07092

1242 Knollwood Road

Mountainside, NJ 07092

1242 Poplar Avenue

Mountainside, NJ 07092

1243 Us Highway 22

Mountainside, NJ 07092-2604

1243-47 Route 22

Mountainside, NJ 07092

1244 Beech Avenue

Mountainside, NJ 07092

1244 Deerfield Court

Mountainside, NJ 07092

1245 Cedar Avenue

Mountainside, NJ 07092

1245 Knollwood Road

Mountainside, NJ 07092

1246 Knollwood Road

Mountainside, NJ 07092

1246 Wood Valley Road

Mountainside, NJ 07092

1247 Poplar Avenue

Mountainside, NJ 07092

1247 Wood Valley Road

Mountainside, NJ 07092

1248 Cedar Avenue

Mountainside, NJ 07092

1248 Deerfield Court

Mountainside, NJ 07092

1248 Knollwood Road

Mountainside, NJ 07092

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