What kinds of homes are in Old Greenwich, CT?

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

Old Greenwich, CT has 2,542 (±222) homes (2020–2024 American Community Survey).

That is about 1,274 homes per square mile of land.

82.2% are detached single-family houses.

3.2% are in buildings of two to four units.

10.5% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 2,542 (±222)
Detached houses: 82.2%
2–4 unit buildings: 3.2%
5+ unit buildings: 10.5%

Homes in Old Greenwich by building size

Housing units by units in structure, 2020–2024
Building type	Old Greenwich	Western Connecticut Planning Region	Connecticut	United States
Single-family, detached	82.2% (±5.3 points)	57.3%	58.6%	61.3%
Single-family, attached (townhouse, rowhouse)	4.1% (±3.0 points)	7.4%	6.5%	6.2%
2 units	3.2% (±2.7 points)	6.2%	7.5%	3.4%
3 or 4 units	0.0% (±1.7 points)	5.8%	8.1%	4.3%
5 to 9 units	0.0% (±1.7 points)	4.2%	4.9%	4.5%
10 to 19 units	1.8% (±2.3 points)	3.5%	3.5%	4.3%
20 or more units	8.7% (±5.1 points)	15.2%	10.2%	10.3%
Mobile home	0.0% (±1.7 points)	0.4%	0.7%	5.6%
Boat, RV, van, etc.	0.0% (±1.7 points)	0.0%	0.0%	0.1%

In Old Greenwich, the share of homes in buildings of five or more units is lower than in Western Connecticut Planning Region (22.9%).

It is also lower than in Connecticut (18.6%).

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

Homes in buildings of 5 or more units in places near Old Greenwich

Nearest places with a published estimate, compared with Old Greenwich
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Old Greenwich	—	10.5% (±5.8 points)	—
Riverside	1.1 mi	6.9% (±2.7 points)	Not measurably different
Cos Cob	2.3 mi	8.4% (±4.2 points)	Not measurably different
Greenwich (community)	3.1 mi	30.9% (±4.9 points)	Higher
Stamford	4.3 mi	43.7% (±1.9 points)	Higher
Pemberwick	4.6 mi	9.4% (±6.0 points)	Not measurably different
Byram	4.7 mi	11.6% (±5.2 points)	Not measurably different
Noroton	4.8 mi	19.4% (±8.3 points)	Not measurably different
Darien	5.1 mi	8.3% (±2.6 points)	Not measurably different

Nearby places with a measurably higher figure: Greenwich (community), CT (30.9%), Stamford, CT (43.7%).

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 Western Connecticut Planning Region, place by place

Rank	Place	Homes in buildings of 5 or more units
7	New Canaan (community)	21.2% (±6.7 points)
8	Noroton	19.4% (±8.3 points)
9	Ridgefield (community)	18.4% (±6.1 points)
10	Westport Village	16.4% (±8.7 points)
11	Bethel (community)	15.0% (±4.7 points)
12	Byram	11.6% (±5.2 points)
13	Old Greenwich	10.5% (±5.8 points)
14	Pemberwick	9.4% (±6.0 points)
15	Cos Cob	8.4% (±4.2 points)
16	Glenville	7.7% (±5.4 points)
17	Riverside	6.9% (±2.7 points)
18	Staples	5.4% (±3.6 points)
19	Noroton Heights	4.0% (±6.1 points)

Showing 13 of 33 places in Western Connecticut Planning Region, ranked from highest to lowest.

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

It lies inside Greenwich, 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 Old Greenwich

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 Old Greenwich beside you.

Create a landlord account · See what landlords get

Looking for a place to rent?

Browse homes for rent near Old Greenwich, 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 Old Greenwich, and send estimates and invoices from your phone.

Join as a pro · Find a pro

Questions about Old Greenwich

How many homes are in Old Greenwich?

Old Greenwich, CT has an estimated 2,542 (±222) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Old Greenwich houses or apartments?

82.2% are detached houses and 4.1% attached houses, while 13.7% are in buildings of two or more units.

How many two-family and small multifamily homes are in Old Greenwich?

3.2% of homes in Old Greenwich 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 — Old Greenwich CDP, Connecticut

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 Old Greenwich CDP, Connecticut (place:56900, in state:09).

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.