What kinds of homes are in Old Lyme, CT?

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

Old Lyme, CT has 4,598 (±269) homes (2020–2024 American Community Survey).

That is about 200 homes per square mile of land.

93.4% are detached single-family houses.

4.0% 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: 4,598 (±269)
Detached houses: 93.4%
2–4 unit buildings: 4.0%
5+ unit buildings: 0.4%

Homes in Old Lyme by building size

Housing units by units in structure, 2020–2024
Building type	Old Lyme	Lower Connecticut River Valley Planning Region	Connecticut	United States
Single-family, detached	93.4% (±2.8 points)	72.4%	58.6%	61.3%
Single-family, attached (townhouse, rowhouse)	0.5% (±0.5 points)	4.0%	6.5%	6.2%
2 units	3.2% (±2.0 points)	5.2%	7.5%	3.4%
3 or 4 units	0.8% (±0.6 points)	4.7%	8.1%	4.3%
5 to 9 units	0.3% (±0.4 points)	3.8%	4.9%	4.5%
10 to 19 units	0.0% (±0.9 points)	2.8%	3.5%	4.3%
20 or more units	0.1% (±0.2 points)	6.1%	10.2%	10.3%
Mobile home	1.6% (±1.8 points)	1.0%	0.7%	5.6%
Boat, RV, van, etc.	0.0% (±0.9 points)	0.0%	0.0%	0.1%

In Old Lyme, the share of homes in buildings of five or more units is lower than in Lower Connecticut River Valley Planning Region (12.7%).

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 Lyme

Nearest places with a published estimate, compared with Old Lyme
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Old Lyme	—	0.4% (±1.0 points)	—
Old Saybrook Center	3.2 mi	20.2% (±9.7 points)	Higher
Old Saybrook	4.2 mi	5.0% (±2.1 points)	Higher
East Lyme	5.0 mi	11.8% (±2.4 points)	Higher
Essex Village	5.5 mi	5.5% (±6.1 points)	Not measurably different
Niantic	5.5 mi	11.9% (±6.9 points)	Higher
Saybrook Manor	5.6 mi	5.3% (±6.3 points)	Not measurably different
Lyme	6.1 mi	0.0% (±6.1 points)	Not measurably different
Essex	6.2 mi	10.4% (±3.6 points)	Higher

Nearby places with a measurably higher figure: Old Saybrook Center, CT (20.2%), Old Saybrook, CT (5.0%), East Lyme, CT (11.8%).

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 Lower Connecticut River Valley Planning Region, place by place

Rank	Place	Homes in buildings of 5 or more units
8	Portland	4.1% (±2.4 points)
9	East Hampton	3.9% (±2.0 points)
10	Westbrook	3.7% (±2.4 points)
11	Haddam	3.1% (±2.5 points)
12	East Haddam	0.5% (±1.5 points)
13 (tie)	Killingworth	0.4% (±2.2 points)
13 (tie)	Old Lyme	0.4% (±1.0 points)
15 (tie)	Durham	0.0% (±2.4 points)
15 (tie)	Lyme	0.0% (±6.1 points)
15 (tie)	Middlefield	0.0% (±3.5 points)

Showing 10 of 17 places in Lower Connecticut River Valley Planning Region, 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 Old Lyme

How many homes are in Old Lyme?

Old Lyme, CT has an estimated 4,598 (±269) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Old Lyme houses or apartments?

93.4% are detached houses and 0.5% attached houses, while 4.4% are in buildings of two or more units.

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

4.0% of homes in Old Lyme 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 Lyme town, Lower Connecticut River Valley Planning Region, 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 Lyme town, Lower Connecticut River Valley Planning Region, Connecticut (county subdivision:57040, in state:09 county:130).

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.