How much do single-family homes cost in Key Biscayne?

The 36 single-family homes for sale in Key Biscayne on this page ask from $3,300,000 to $237,000,000, a median of $7,774,500 or about $1,981 per square foot, from BeachesMLS listings as of November 8, 2026. 14 are under $7,000,000, 11 are between $7,000,000 and $14,500,000 and 11 are at $14,500,000 and up. Asking prices are not sale prices: the Key Biscayne housing market report shows what homes closed for.

How many single-family homes are for sale in Key Biscayne right now?

36 single-family homes are listed for sale in Key Biscayne as of November 8, 2026, and the typical one has been on the market 143 days; 13 of them have cut the asking price since listing. The list refreshes from the MLS through the day, and the alert on this page sends each new one the day it lists.

Which Key Biscayne communities have single-family homes for sale?

Biscayne Key Estates (9, median $5,600,000), Cape Florida Sub (6, median $15,495,000), Tropical Isle Homes Sub 4 (4, median $7,249,500), Cape Fla Sub (3, median $19,450,000), Mashta Island (2, median $17,650,000) and Mashta Island A (2, median $12,425,000) hold the most single-family homes for sale in Key Biscayne today. The rest are spread across 7 more communities.

How new are the single-family homes for sale in Key Biscayne?

8 of the 36 listings were built in the last five years; the rest date from 1950 to 2026, as of November 8, 2026. A new home's permits, warranty and the builder's contract terms are what we read before you reserve or offer.

Key Biscayne Single-Family Homes for Sale

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Live BeachesMLS listings matching this search in Key Biscayne, Florida, updated throughout the day.

Houses are the scarcer half of Key Biscayne, and most sit on the village streets west of Crandon Boulevard or at the south end near the state park. Biscayne Key Estates and Tropical Isle Homes cover streets such as Curtiswood Drive, Harbor Drive, Hampton Lane and Glenridge Road, where original early-fifties houses share blocks with renovated homes and new two-story houses built to current flood elevation. The Cape Florida sections add larger canal lots, and Mashta Island in the bay adds waterfront homes. Many of these houses carry no association fee. The first question on any Key Biscayne house is whether you are paying for the building or the land, so compare lot size, elevation, roof and window age and permitted work before you offer.

36 listings, newest first.

The 36 listings on this page run from $3,300,000 to $237,000,000, with a median of $7,774,500, about $1,981 per square foot, and they have been listed a median of 143 days.

The communities with the most listings here are Biscayne Key Estates (9), Cape Florida Sub (6), Tropical Isle Homes Sub 4 (4), Cape Fla Sub (3) and Mashta Island (2), 24 of the 36; the others are spread across 8 more communities. All of them are single-family homes. Bedrooms run from 3 to 8, a median of 5; they were built between 1950 and 2026, a median of 2002, and 13 in the last ten years. 36 of the 36 have a pool, and 14 are on the water.

Ask About These Key Biscayne Single-Family Homes

Tell us which of these homes you want to see, or what you are looking for that is not here, and a Key Biscayne agent replies with the homes that fit, the questions to ask about each and a time to see them. Call or text (786) 914-1017 or send the form on this page.

Key Biscayne Single-Family Homes: What Is on the Market

What the 36 single-family homes for sale in Key Biscayne tell you about this market, counted from the listings on this page as of November 8, 2026. Every figure moves with the inventory. Ask about any of these homes or request a showing from this page.

Listings on this page	36
Asking prices	$3,300,000 to $237,000,000
Median asking price	$7,774,500
Median price per square foot	$1,981/sq ft
Median living area	4,105 sq ft
Bedrooms	3 to 8, median 5
Year built	1950 to 2026, median 2002
Median days on market	143 days
Listings with a price cut	13 of 36
With a pool	36 of 36
On the water	14 of 36
With ocean access	8 of 36
No fixed bridges to the inlet	4 of 36
Garage spaces	1 to 7
Median lot size (houses)	9,148 sq ft

Communities With the Most Listings

Community	Listings	Median asking price
Biscayne Key Estates	9	$5,600,000
Cape Florida Sub	6	$15,495,000
Tropical Isle Homes Sub 4	4	$7,249,500
Cape Fla Sub	3	$19,450,000
Mashta Island	2	$17,650,000
Mashta Island A	2	$12,425,000

By Asking Price

Under $7,000,000: 14 listings
$7,000,000 to $14,500,000: 11 listings
$14,500,000 and up: 11 listings

Counted from the listings on this page, BeachesMLS, as of November 8, 2026. Asking prices, not sale prices. Not an appraisal.

Key Biscayne Single-Family Homes: Questions Buyers Ask

How much do single-family homes cost in Key Biscayne?: The 36 single-family homes for sale in Key Biscayne on this page ask from $3,300,000 to $237,000,000, a median of $7,774,500 or about $1,981 per square foot, from BeachesMLS listings as of November 8, 2026. 14 are under $7,000,000, 11 are between $7,000,000 and $14,500,000 and 11 are at $14,500,000 and up. Asking prices are not sale prices: the Key Biscayne housing market report shows what homes closed for.
How many single-family homes are for sale in Key Biscayne right now?: 36 single-family homes are listed for sale in Key Biscayne as of November 8, 2026, and the typical one has been on the market 143 days; 13 of them have cut the asking price since listing. The list refreshes from the MLS through the day, and the alert on this page sends each new one the day it lists.
Which Key Biscayne communities have single-family homes for sale?: Biscayne Key Estates (9, median $5,600,000), Cape Florida Sub (6, median $15,495,000), Tropical Isle Homes Sub 4 (4, median $7,249,500), Cape Fla Sub (3, median $19,450,000), Mashta Island (2, median $17,650,000) and Mashta Island A (2, median $12,425,000) hold the most single-family homes for sale in Key Biscayne today. The rest are spread across 7 more communities.
How new are the single-family homes for sale in Key Biscayne?: 8 of the 36 listings were built in the last five years; the rest date from 1950 to 2026, as of November 8, 2026. A new home's permits, warranty and the builder's contract terms are what we read before you reserve or offer.

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