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Key Biscayne Penthouses

Key Biscayne, FL 33149

Key Biscayne, FL
6
for sale
3
for rent
3
sold
Median Price
$18.5M
Median SQFT Price
$2,474
SF Range
1,310 - 9,600 SF
Beds
2 - 5
Avg. Dom
119 days
Year Built
1997 - 2014

Overview

Eight Penthouses. One Island. No More Will Ever Be Built.

Key Biscayne is a barrier island with a hard building cap. There are exactly 8 penthouse listings right now — and when they're gone, you wait. Possibly for years. This is not a market where you browse casually. If a Key Biscayne penthouse appears, the window is measured in days, not months.

Where They Are

  • Oceana Key Biscayne — Jeff Koons sculpture in the lobby. Direct ocean. The most prestigious condo address on the island. Penthouses above $10M.
  • One Ocean — Mexican architect Enrique Norten. Only 50 residences. A curated contemporary art collection in the common areas. If Oceana is the power address, One Ocean is the design address.
  • Club Tower Two — Crandon Blvd, the island's main artery. Established, well-maintained, with the community infrastructure (tennis, pool, beach club) that newer buildings can't replicate.

Why Families Pay $10M+ to Live Here

  • A-rated schools — Key Biscayne K-8 Center and MAST Academy are among the best in Miami-Dade
  • Crandon Park + Bill Baggs — two state parks on one island, miles of beach without the crowds
  • 10 minutes to Brickell — island living without island isolation
  • Security — one road in, one road out. Latin American families value this above all else.

The Math on Scarcity

Key Biscayne has roughly 6,000 residential units total. Of those, maybe 30-40 could qualify as "penthouses." At any given time, 5-10 are for sale. Supply will never increase. Every year, demand grows as more families relocate to South Florida. This is the one Miami market where the long-term value proposition is mathematically inevitable.

See what's available right now — or contact us to be notified the moment a Key Biscayne penthouse hits the market.

💡 Did You Know?

Record sale: $31,750,000 changed hands at 330 HARBOR DR, Key Biscayne, FL 33149 in June 2025.
The area's oldest structure stands at 485 ALLENDALE RD, Key Biscayne, FL 33149, built in 1950.
Housing mix: 82% condos, 18% single-family homes.

Data powered by brokerone.io

Key Biscayne Penthouses Units For Sale

Status Bedrooms
$1,595,000
715 Crandon Blvd # 5, Key Biscayne FL 33149
For Sale
2 Beds · 2 Baths · 1,310 SQFT
$1,218/SQFT · 308 DOM
$5,100,000
791 Crandon Blvd, Key Biscayne FL 33149
For Sale
3 Beds · 3 Baths · 2,510 SQFT
$2,032/SQFT · 21 DOM
$18,500,000
799 Crandon Blvd # 8, Key Biscayne FL 33149
For Sale
5 Beds · 5 Baths · 4,566 SQFT
$4,052/SQFT · 22 DOM
$18,500,000
350 Ocean Dr, Key Biscayne FL 33149
For Sale
5 Beds · 5 Baths · 4,764 SQFT
$3,883/SQFT · 25 DOM
$18,900,000
445 Grand Bay Drive # 1A, Key Biscayne FL 33149
For Sale
5 Beds · 5 Baths · 8,435 SQFT
$2,241/SQFT · 128 DOM
$26,000,000
430 Grand Bay Dr, Key Biscayne FL 33149
For Sale
4 Beds · 4 Baths · 9,600 SQFT
$2,708/SQFT · 210 DOM

Key Biscayne Penthouses Real Estate Market Trends

Median List Price
The median list price of homes in Key Biscayne Penthouses, was $18,500,000 in June 2026, compared to $1,995,000 in June 2025.

Location

Key Biscayne, FL 33149

Neighborhood Insights

Ownership & Property Data

Median Assessed Value $945K
Highest Assessed Value $157.8M

Top Property Owners

EDW A MCCARTHY-ARCHBISHOP $47.7M
KEY BISC PRESBYTERIAN CHURCH $28.6M
EDGARDO DEFORTUNA ANA CRISTINA DEFORTUNA $24.2M
TIMOTHY BRYAN $23.4M
INIGO N ARDID LILIANA PAEZ $20.9M

Foreclosure Risk Score

26/100 MODERATE
30-Year Mortgage Rate 6.47%
Local Unemployment 3.9%

Risk score based on economic indicators, lis pendens filings, and census data. Not financial advice.

Data powered by brokerone.io

Key Biscayne Penthouses Frequently Asked Questions

  • The Key Biscayne Penthouses building is located at address Key Biscayne, FL 33149.

  • The Key Biscayne Penthouses building was constructed in the year 1997.

  • The Key Biscayne Penthouses building is located in the Key Biscayne, FL neighborhood.

  • The Key Biscayne Penthouses building belongs to the following categories: Waterfront, Luxury, Exclusive.

  • Currently, there are 6 condos for sale in the Key Biscayne Penthouses building.

  • Currently, there are 3 condos for rent in the Key Biscayne Penthouses building.

  • 3 condos have been sold in the Key Biscayne Penthouses building in the last 12 months.

  • The square footage of condos in the Key Biscayne Penthouses building is from 1310 to 9600 sq.ft.

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