What kinds of homes are in South Plainfield Borough, NJ?

Name: Types of homes in South Plainfield Borough, NJ, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

South Plainfield Borough, NJ has 8,530 (±273) homes (2020–2024 American Community Survey).

That is about 1,028 homes per square mile of land.

78.5% are detached single-family houses.

5.0% are in buildings of two to four units.

11.0% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 8,530 (±273)
Detached houses: 78.5%
2–4 unit buildings: 5.0%
5+ unit buildings: 11.0%

Homes in South Plainfield Borough by building size

Housing units by units in structure, 2020–2024
Building type	South Plainfield Borough	Middlesex County	New Jersey	United States
Single-family, detached	78.5% (±2.6 points)	52.4%	52.6%	61.3%
Single-family, attached (townhouse, rowhouse)	5.5% (±1.5 points)	11.1%	10.0%	6.2%
2 units	4.3% (±1.9 points)	6.6%	8.6%	3.4%
3 or 4 units	0.7% (±0.6 points)	5.2%	6.1%	4.3%
5 to 9 units	0.9% (±0.7 points)	6.0%	4.6%	4.5%
10 to 19 units	4.1% (±1.4 points)	8.2%	4.9%	4.3%
20 or more units	6.0% (±2.0 points)	9.8%	12.3%	10.3%
Mobile home	0.0% (±0.1 points)	0.8%	0.9%	5.6%
Boat, RV, van, etc.	0.0% (±0.5 points)	0.0%	0.0%	0.1%

In South Plainfield Borough, the share of homes in buildings of five or more units is lower than in Middlesex County (24.0%).

It is also lower than in New Jersey (21.8%).

It is lower than the national figure (19.1%).

Homes in buildings of 5 or more units in places near South Plainfield Borough

Nearest places with a published estimate, compared with South Plainfield Borough
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
South Plainfield Borough	—	11.0% (±2.5 points)	—
Plainfield	2.8 mi	22.9% (±3.1 points)	Higher
Dunellen Borough	2.9 mi	8.1% (±4.8 points)	Not measurably different
Piscataway Township	3.1 mi	27.6% (±3.6 points)	Higher
North Plainfield Borough	3.5 mi	23.7% (±6.0 points)	Higher
Metuchen Borough	3.5 mi	16.6% (±3.2 points)	Higher
Green Brook Township	4.1 mi	16.5% (±11.1 points)	Not measurably different
Middlesex Borough	4.4 mi	16.4% (±4.9 points)	Not measurably different
Scotch Plains Township	4.6 mi	12.3% (±2.1 points)	Not measurably different

Nearby places with a measurably higher figure: Plainfield, NJ (22.9%), Piscataway Township, NJ (27.6%), North Plainfield Borough, NJ (23.7%).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Homes in buildings of 5 or more units across Middlesex County, place by place

Rank	Place	Homes in buildings of 5 or more units
13 (tie)	East Brunswick Township	19.5% (±2.8 points)
15	South Brunswick Township	16.8% (±2.7 points)
16	Metuchen Borough	16.6% (±3.2 points)
17	Middlesex Borough	16.4% (±4.9 points)
18	South River Borough	15.1% (±4.5 points)
19	Jamesburg Borough	13.4% (±6.5 points)
20	South Plainfield Borough	11.0% (±2.5 points)
21	Spotswood Borough	10.9% (±4.1 points)
22	Cranbury Township	8.6% (±4.4 points)
23	Dunellen Borough	8.1% (±4.8 points)
24	Monroe Township (Middlesex County)	6.7% (±1.8 points)
25	Milltown Borough	2.2% (±2.3 points)

Showing 12 of 25 places in Middlesex County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates).

Margins of error are at the 90% confidence level.

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Questions about South Plainfield Borough

How many homes are in South Plainfield Borough?

South Plainfield Borough, NJ has an estimated 8,530 (±273) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in South Plainfield Borough houses or apartments?

78.5% are detached houses and 5.5% attached houses, while 16.0% are in buildings of two or more units.

How many two-family and small multifamily homes are in South Plainfield Borough?

5.0% of homes in South Plainfield Borough are in buildings of two to four units, the small rental buildings that are often owner-occupied.

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — South Plainfield borough, Middlesex County, New Jersey

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for South Plainfield borough, Middlesex County, New Jersey (county subdivision:69390, in state:34 county:023).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The API needs a free key.

Request a Census API key.

DP04_0001E, DP04_0001M, DP04_0007PE, DP04_0007PM, DP04_0008PE, DP04_0008PM, DP04_0009PE, DP04_0009PM, DP04_0010PE, DP04_0010PM, DP04_0011PE, DP04_0011PM, DP04_0012PE, DP04_0012PM, DP04_0013PE, DP04_0013PM, DP04_0014PE, DP04_0014PM, DP04_0015PE, DP04_0015PM

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.