What kinds of homes are in Key Biscayne, FL?

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

Key Biscayne, FL has 7,310 (±420) homes (2020–2024 American Community Survey).

That is about 5,862 homes per square mile of land.

18.6% are detached single-family houses.

0.8% are in buildings of two to four units.

76.5% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 7,310 (±420)
Detached houses: 18.6%
2–4 unit buildings: 0.8%
5+ unit buildings: 76.5%

Homes in Key Biscayne by building size

Housing units by units in structure, 2020–2024
Building type	Key Biscayne	Miami-Dade County	Florida	United States
Single-family, detached	18.6% (±2.0 points)	38.8%	54.7%	61.3%
Single-family, attached (townhouse, rowhouse)	3.5% (±1.6 points)	9.9%	6.7%	6.2%
2 units	0.6% (±0.7 points)	1.9%	2.0%	3.4%
3 or 4 units	0.2% (±0.2 points)	3.3%	3.9%	4.3%
5 to 9 units	1.3% (±0.8 points)	4.6%	4.7%	4.5%
10 to 19 units	3.2% (±1.1 points)	6.4%	5.4%	4.3%
20 or more units	72.0% (±2.9 points)	33.8%	14.4%	10.3%
Mobile home	0.6% (±0.6 points)	1.3%	8.0%	5.6%
Boat, RV, van, etc.	0.0% (±0.7 points)	0.1%	0.2%	0.1%

In Key Biscayne, the share of homes in buildings of five or more units is higher than in Miami-Dade County (44.8%).

It is also higher than in Florida (24.5%).

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

Homes in buildings of 5 or more units in places near Key Biscayne

Nearest places with a published estimate, compared with Key Biscayne
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Key Biscayne	—	76.5% (±3.2 points)	—
Fisher Island	5.1 mi	90.8% (±23.8 points)	Not measurably different
Coral Gables	6.0 mi	43.0% (±3.4 points)	Lower
Miami	6.4 mi	60.8% (±1.1 points)	Lower
South Miami	8.2 mi	34.3% (±5.9 points)	Lower
Miami Beach	8.4 mi	84.5% (±2.1 points)	Higher
Pinecrest	8.8 mi	20.1% (±3.6 points)	Lower
West Miami	9.4 mi	39.7% (±7.3 points)	Lower
Glenvar Heights	9.4 mi	64.9% (±5.4 points)	Lower

Nearby places with a measurably lower figure: Coral Gables, FL (43.0%), Miami, FL (60.8%), South Miami, FL (34.3%).

Nearby places with a measurably higher figure: Miami Beach, FL (84.5%).

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 Miami-Dade County, place by place

Rank	Place	Homes in buildings of 5 or more units
2	Bal Harbour	93.9% (±6.3 points)
3	North Bay Village	91.0% (±5.1 points)
4	Fisher Island	90.8% (±23.8 points)
5	Aventura	90.2% (±1.9 points)
6	Miami Beach	84.5% (±2.1 points)
7	Bay Harbor Islands	81.5% (±10.9 points)
8	Key Biscayne	76.5% (±3.2 points)
9	Fountainebleau	67.1% (±3.4 points)
10	Glenvar Heights	64.9% (±5.4 points)
11	Ojus	61.0% (±5.0 points)
12 (tie)	Ives Estates	60.8% (±6.7 points)
12 (tie)	Miami	60.8% (±1.1 points)
14	Surfside	59.7% (±9.1 points)

Showing 13 of 70 places in Miami-Dade 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 Key Biscayne

How many homes are in Key Biscayne?

Key Biscayne, FL has an estimated 7,310 (±420) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Key Biscayne houses or apartments?

18.6% are detached houses and 3.5% attached houses, while 77.3% are in buildings of two or more units.

How many two-family and small multifamily homes are in Key Biscayne?

0.8% of homes in Key Biscayne 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 — Key Biscayne village, Florida

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 Key Biscayne village, Florida (place:36300, in state:12).

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.