How much do new construction cost in Key Biscayne?

The 5 new construction for sale in Key Biscayne on this page ask from $6,900,000 to $19,450,000, a median of $8,000,000 or about $2,029 per square foot, from BeachesMLS listings as of November 8, 2026. 2 are under $7,500,000, 1 are between $7,500,000 and $8,500,000 and 2 are at $8,500,000 and up. Asking prices are not sale prices: the Key Biscayne housing market report shows what homes closed for.

How many new construction are for sale in Key Biscayne right now?

5 new construction are listed for sale in Key Biscayne as of November 8, 2026, and the typical one has been on the market 163 days. 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 new construction for sale?

Tropical Isle Homes Sub (2, median $7,745,000) and Tropical Isle Homes Sub 4 (2, median $7,700,000) hold the most new construction for sale in Key Biscayne today. The rest are spread across 1 more community.

How new are the new construction for sale in Key Biscayne?

5 of the 5 listings were built in the last five years; the rest date from 2025 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 New Construction Homes & Condos for Sale

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

New construction on Key Biscayne means houses, built one lot at a time. Owners and builders replace original early-fifties houses in Tropical Isle Homes and Biscayne Key Estates with two-story homes raised to current flood elevation, usually with a pool, and the canal lots of the Cape Florida sections go through the same cycle. Because the island is built out, a new house nearly always stands where an older one stood. That makes the paper trail the thing to review: the village building permits, the final inspections and certificate of occupancy, the elevation certificate and the builder's warranty. If you are buying a lot to build on, ask the village what its zoning allows for height and lot coverage before you price the Key Biscayne land.

5 listings, newest first.

The 5 listings on this page run from $6,900,000 to $19,450,000, with a median of $8,000,000, about $2,029 per square foot, and they have been listed a median of 163 days.

The communities with the most listings here are Tropical Isle Homes Sub (2) and Tropical Isle Homes Sub 4 (2), 4 of the 5; the others are spread across 1 more community. All of them are single-family homes. Bedrooms run from 5 to 6, a median of 6; they were built between 2025 and 2026, a median of 2026, and 5 in the last ten years. 5 of the 5 have a pool, and 1 is on the water.

Ask About These Key Biscayne New Construction

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 New Construction: What Is on the Market

What the 5 new construction 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	5
Asking prices	$6,900,000 to $19,450,000
Median asking price	$8,000,000
Median price per square foot	$2,029/sq ft
Median living area	3,768 sq ft
Bedrooms	5 to 6, median 6
Year built	2025 to 2026, median 2026
Median days on market	163 days
With a pool	5 of 5
On the water	1 of 5
With ocean access	1 of 5
No fixed bridges to the inlet	1 of 5
Median lot size (houses)	7,840.8 sq ft

Communities With the Most Listings

Community	Listings	Median asking price
Tropical Isle Homes Sub	2	$7,745,000
Tropical Isle Homes Sub 4	2	$7,700,000

By Asking Price

Under $7,500,000: 2 listings
$7,500,000 to $8,500,000: 1 listing
$8,500,000 and up: 2 listings

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

Key Biscayne New Construction: Questions Buyers Ask

How much do new construction cost in Key Biscayne?: The 5 new construction for sale in Key Biscayne on this page ask from $6,900,000 to $19,450,000, a median of $8,000,000 or about $2,029 per square foot, from BeachesMLS listings as of November 8, 2026. 2 are under $7,500,000, 1 are between $7,500,000 and $8,500,000 and 2 are at $8,500,000 and up. Asking prices are not sale prices: the Key Biscayne housing market report shows what homes closed for.
How many new construction are for sale in Key Biscayne right now?: 5 new construction are listed for sale in Key Biscayne as of November 8, 2026, and the typical one has been on the market 163 days. 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 new construction for sale?: Tropical Isle Homes Sub (2, median $7,745,000) and Tropical Isle Homes Sub 4 (2, median $7,700,000) hold the most new construction for sale in Key Biscayne today. The rest are spread across 1 more community.
How new are the new construction for sale in Key Biscayne?: 5 of the 5 listings were built in the last five years; the rest date from 2025 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.

Before You Buy: The Guides

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