What kinds of homes are in Stony Brook, NY?

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

Stony Brook, NY has 4,943 (±352) homes (2020–2024 American Community Survey).

That is about 849 homes per square mile of land.

89.9% are detached single-family houses.

2.5% are in buildings of two to four units.

0.4% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 4,943 (±352)
Detached houses: 89.9%
2–4 unit buildings: 2.5%
5+ unit buildings: 0.4%

Homes in Stony Brook by building size

Housing units by units in structure, 2020–2024
Building type	Stony Brook	Suffolk County	New York	United States
Single-family, detached	89.9% (±2.5 points)	79.7%	41.2%	61.3%
Single-family, attached (townhouse, rowhouse)	6.9% (±2.1 points)	5.9%	5.5%	6.2%
2 units	1.5% (±1.2 points)	2.6%	9.6%	3.4%
3 or 4 units	1.0% (±1.0 points)	2.1%	6.9%	4.3%
5 to 9 units	0.0% (±0.9 points)	2.2%	5.2%	4.5%
10 to 19 units	0.4% (±0.3 points)	2.6%	4.4%	4.3%
20 or more units	0.0% (±0.9 points)	3.6%	25.1%	10.3%
Mobile home	0.3% (±0.5 points)	1.3%	2.1%	5.6%
Boat, RV, van, etc.	0.0% (±0.9 points)	0.0%	0.0%	0.1%

In Stony Brook, the share of homes in buildings of five or more units is lower than in Suffolk County (8.4%).

It is also lower than in New York (34.7%).

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

Homes in buildings of 5 or more units in places near Stony Brook

Nearest places with a published estimate, compared with Stony Brook
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Stony Brook	—	0.4% (±1.3 points)	—
Village of Head of the Harbor	1.9 mi	1.1% (±10.2 points)	Not measurably different
East Setauket	2.0 mi	8.0% (±3.2 points)	Higher
St. James	2.5 mi	9.1% (±4.4 points)	Higher
Town of Smithtown	2.7 mi	6.4% (±1.1 points)	Higher
Setauket	2.9 mi	1.1% (±4.2 points)	Not measurably different
Village of Nissequogue	3.1 mi	0.0% (±11.3 points)	Not measurably different
Port Jefferson Station	3.5 mi	13.5% (±5.8 points)	Higher
Village of Lake Grove	3.5 mi	15.7% (±5.3 points)	Higher

Nearby places with a measurably higher figure: East Setauket, NY (8.0%), St. James, NY (9.1%), Town of Smithtown, NY (6.4%).

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 Suffolk County, place by place

Rank	Place	Homes in buildings of 5 or more units
85 (tie)	Fort Salonga	0.7% (±2.0 points)
85 (tie)	Mastic Beach	0.7% (±1.1 points)
89	Cold Spring Harbor	0.6% (±5.6 points)
90	West Islip	0.5% (±0.6 points)
91 (tie)	North Sea	0.4% (±1.7 points)
91 (tie)	Northwest Harbor	0.4% (±1.6 points)
91 (tie)	Stony Brook	0.4% (±1.3 points)
94 (tie)	Mattituck	0.3% (±2.5 points)
94 (tie)	Remsenburg-Speonk	0.3% (±4.0 points)
94 (tie)	Riverside (community)	0.3% (±5.3 points)
97	Sound Beach	0.2% (±2.0 points)
98 (tie)	Aquebogue	0.0% (±7.4 points)
98 (tie)	Baywood	0.0% (±3.5 points)

Showing 13 of 112 places in Suffolk County, ranked from highest to lowest.

Stony Brook is a census-designated place: an unincorporated community the Census Bureau draws for statistics, with no municipal government of its own.

It lies inside the Town of Brookhaven, whose figures include it.

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

Margins of error are at the 90% confidence level.

What you can do on Seayora in Stony Brook

One account for renting, owning, managing and fixing homes, with these figures beside you.

Own or manage a rental?

List it, sign the lease and collect rent online, with the figures for Stony Brook beside you.

Create a landlord account · See what landlords get

Looking for a place to rent?

Browse homes for rent near Stony Brook, save the ones you like and apply online.

Browse rentals · Create a renter account

Do repairs, renovations or maintenance?

Get found by owners and renters near Stony Brook, and send estimates and invoices from your phone.

Join as a pro · Find a pro

Questions about Stony Brook

How many homes are in Stony Brook?

Stony Brook, NY has an estimated 4,943 (±352) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Stony Brook houses or apartments?

89.9% are detached houses and 6.9% attached houses, while 2.9% are in buildings of two or more units.

How many two-family and small multifamily homes are in Stony Brook?

2.5% of homes in Stony Brook 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 — Stony Brook CDP, New York

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 Stony Brook CDP, New York (place:71608, in state:36).

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.