What kinds of homes are in Sullivan's Island, SC?

Name: Types of homes in Sullivan's Island, SC, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Sullivan's Island, SC has 1,088 (±135) homes (2020–2024 American Community Survey).

That is about 436 homes per square mile of land.

90.3% are detached single-family houses.

1.7% are in buildings of two to four units.

6.2% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 1,088 (±135)
Detached houses: 90.3%
2–4 unit buildings: 1.7%
5+ unit buildings: 6.2%

Homes in Sullivan's Island by building size

Housing units by units in structure, 2020–2024
Building type	Sullivan's Island	Charleston County	South Carolina	United States
Single-family, detached	90.3% (±5.4 points)	58.0%	64.5%	61.3%
Single-family, attached (townhouse, rowhouse)	0.9% (±0.8 points)	6.9%	3.7%	6.2%
2 units	0.0% (±4.0 points)	2.8%	1.7%	3.4%
3 or 4 units	1.7% (±2.0 points)	4.0%	2.8%	4.3%
5 to 9 units	1.1% (±1.1 points)	7.1%	4.0%	4.5%
10 to 19 units	2.1% (±1.6 points)	5.1%	3.3%	4.3%
20 or more units	3.0% (±4.5 points)	11.0%	5.6%	10.3%
Mobile home	0.8% (±1.3 points)	4.9%	14.2%	5.6%
Boat, RV, van, etc.	0.0% (±4.0 points)	0.1%	0.2%	0.1%

In Sullivan's Island, the share of homes in buildings of five or more units is lower than in Charleston County (23.2%).

It is also lower than in South Carolina (12.9%).

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

Homes in buildings of 5 or more units in places near Sullivan's Island

Nearest places with a published estimate, compared with Sullivan's Island
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Sullivan's Island	—	6.2% (±4.9 points)	—
Mount Pleasant	3.3 mi	20.8% (±2.0 points)	Higher
Isle of Palms	5.1 mi	25.3% (±5.4 points)	Higher
James Island	6.6 mi	1.1% (±1.7 points)	Not measurably different
Charleston	9.1 mi	35.5% (±1.9 points)	Higher
Folly Beach	10 mi	20.5% (±7.3 points)	Higher
Hanahan	15 mi	16.0% (±3.5 points)	Higher
North Charleston	17 mi	27.1% (±2.2 points)	Higher
Awendaw	17 mi	0.0% (±9.2 points)	Not measurably different

Nearby places with a measurably higher figure: Mount Pleasant, SC (20.8%), Isle of Palms, SC (25.3%), Charleston, SC (35.5%).

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 Charleston County, place by place

Rank	Place	Homes in buildings of 5 or more units
2	North Charleston	27.1% (±2.2 points)
3	Isle of Palms	25.3% (±5.4 points)
4	Kiawah Island	24.0% (±5.9 points)
5	Seabrook Island	23.7% (±6.1 points)
6	Mount Pleasant	20.8% (±2.0 points)
7	Folly Beach	20.5% (±7.3 points)
8	Sullivan's Island	6.2% (±4.9 points)
9	Lincolnville	3.7% (±8.5 points)
10	Ravenel	1.2% (±6.1 points)
11	James Island	1.1% (±1.7 points)
12 (tie)	Awendaw	0.0% (±9.2 points)
12 (tie)	Hollywood	0.0% (±2.9 points)
12 (tie)	McClellanville	0.0% (±20.4 points)

Showing 13 of 16 places in Charleston 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 Sullivan's Island

How many homes are in Sullivan's Island?

Sullivan's Island, SC has an estimated 1,088 (±135) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Sullivan's Island houses or apartments?

90.3% are detached houses and 0.9% attached houses, while 7.9% are in buildings of two or more units.

How many two-family and small multifamily homes are in Sullivan's Island?

1.7% of homes in Sullivan's Island 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 — Sullivan's Island town, South Carolina

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 Sullivan's Island town, South Carolina (place:70090, in state:45).

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.