Commercial Real Estate Market in South Plainfield, NJ
Updated monthly: sale, lease, property records, location trend, and more… · Last update: August 31
90 active listings and 520 off-market properties in South Plainfield, NJ. Commercial property asks $171/SF to buy and $19.67/SF/Yr to lease.
Market Trends
South Plainfield, NJ spans 8.2 square miles in Middlesex County, New Jersey. Figures below refresh monthly; last updated 31 August 2026.
Office
Office space in South Plainfield, NJ asks $109/SF to buy. Vacancy runs 19.9% across the Northeast region in 2025, up from 13.1% in 2019.
Average Sale Price $/SF
Listings
Vacancy Rate % in Northeast region
Retail
Retail space in South Plainfield, NJ asks $136/SF to buy. Vacancy runs 6% across the Northeast region in 2025, little changed from 6% in 2019. Down from a 2020 peak of 7.1%.
Average Sale Price $/SF
Listings
Vacancy Rate % in Northeast region
Industrial
Industrial vacancy in South Plainfield, NJ runs 7.6% across the Northeast region in 2025, up from 5.4% in 2019. Nearly 2.4x the 2021 low of 3.2%.
Vacancy Rate % in Northeast region
Multifamily
Multifamily space in South Plainfield, NJ asks $307/SF to buy. Vacancy runs 5.6% across the Northeast region in 2025, up from 4% in 2022.
Average Sale Price $/SF
Listings
Vacancy Rate % in Northeast region
Market overview
Demographics & Economy
South Plainfield, NJ has 24,261 residents in 8,433 households. Density runs 2,951 people per square mile. Median household income here is $126,161 and median gross rent $1,928 a month.
24,261
Population
8,433
Households
2.9
Avg Household Size
41
Median Age
42%
College-Educated
93%
High-School Grad
8.2 sq mi
ZIP Area
2,951
Density / Sq Mi
$126,161
Median Household Income
$61,777
Median Earnings
$1,928
Median Rent
$444,100
Median Home Value
Tools
Nearby Markets
| Market | Average Sale Price, $/SF | Average Lease Price, $/SF/Yr |
|---|---|---|
| Dunellen | $171 (county avg) | — |
| Metuchen | $171 (county avg) | $23.00 |
| Piscataway | $171 (county avg) | $15.69 |
| Green Brook | $171 (county avg) | — |
Commercial property in South Plainfield, NJ asks $171/SF. The 4 bordering markets run from $171/SF in Dunellen to $171/SF in Dunellen, and the city sits in line with their $171/SF median.
Frequently Asked Questions
What is the average price per square foot for commercial property in South Plainfield?
Commercial property in South Plainfield, NJ asks an average of $171 per square foot. Multifamily carries the highest asking price at $307/SF.
How much does it cost to lease commercial space in South Plainfield?
Asking lease rates in South Plainfield, NJ average $19.67 per square foot per year.
How does South Plainfield compare to nearby markets on price?
South Plainfield, NJ asks $171/SF against $171/SF in Dunellen, $171/SF in Metuchen, $171/SF in Piscataway and $171/SF in Green Brook.
Where does Realmo's South Plainfield market data come from?
Realmo compiles South Plainfield, NJ figures from 6 recent recorded sales, 54 active sale listings, 36 active lease listings, 520 tracked off-market properties. Sale and lease figures refresh monthly; vacancy annually. Last updated 31 August 2026.
Methodology & data sources
- Asking prices and averages
- Computed from 54 active for-sale and 36 active for-lease listings in South Plainfield, NJ. These are ASKING figures from live listings, not closed-transaction prices, and a segment carried by a handful of listings reads as indicative rather than an average.
- Price per square foot
- The county-level $/SF blends closed sales aggregated over the trailing months of available data, not a single day's snapshot — it can differ from any one month's own median.
- Vacancy rates
- Published per-sector market series, taken at the metro level where one exists and otherwise at the Census-region level — a chart reading "in <region> region" is a regional number, not this city's.
- Refresh
- The monthly aggregates close at the end of the previous month, so 31 August 2026 — not today — is the honest last update.
- Known limitations
- office vacancy is reported at Northeast region level, retail vacancy is reported at Northeast region level and industrial vacancy is reported at Northeast region level.
- Coverage
- Metrics below the 10-observation threshold fall back one geographic level. The geography used is named on each figure.
Compiled by the Realmo Data team · reviewed 31 August 2026 · report a data issue
