5 Bedroom Homes in Key Biscayne, FL

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3 beds New construction With a pool

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5 Listings

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5 Bedroom Homes in Key Biscayne, FL

5 Listings

38Active
$19,900,000
5 bd · 4 ba · 3,085 sqft

5 listings

5 Bedroom Homes in Key Biscayne, FL

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5 Listings

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5 Bedroom Homes in Key Biscayne, FL

5 Listings

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

38Active
$19,900,000
5 bd · 4 ba · 3,085 sqft

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

520 S Mashta Dr, Key Biscayne, FL

Maureen Jauregui · Coldwell Banker Realty

47Active

$18,500,000

5 bd · 6 ba · 4,566 sqft

799 Crandon Blvd Ph-8, Key Biscayne, FL

Natalia Anda · Coldwell Banker Realty

Price Reduced93Active

$17,900,000

5 bd · 6 ba · 4,764 sqft

350 Ocean Dr Lph2N, Key Biscayne, FL

Giulietta Ulloa · BHHS EWM Realty

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

82Active

$237,000,000

5 bd · 9 ba · 11,528 sqft

485 W Matheson Dr, Key Biscayne, FL

Jill Eber · Coldwell Banker Realty

52Active

$18,900,000

5 bd · 6 ba · 8,435 sqft

445 Grand Bay Drive Ph-1a, Key Biscayne, FL

Brigitte Nachtigall · One Sotheby's International Realty

Listing data & MLS disclosures

MIAMI REALTORS MLS: The multiple listing information is provided by MIAMI Association of Realtors® from a copyrighted compilation of listings. The compilation of listings and each individual listingare ©2026 MIAMI Association of Realtors®. All Rights Reserved.
The information provided is for consumers’ personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Last Updated: 2026-09-20 09:05:08 UTC

Key Biscayne housing market

August 2026 · This period is still settling

Selling at 95.9% of asking price

Buyers here are paying below asking. MLS · 22 sales · as of Aug 27, 2026

Key Biscayne, FL community profile

Population: 15,327
Median income: $154,457
Housing units: 7,079
People per sq. mi.: 982.5
Area: 15.6 sq. mi.

Source: HJN community data

Explore Key Biscayne homes

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

Listing data & MLS disclosures

MIAMI REALTORS MLS: The multiple listing information is provided by MIAMI Association of Realtors® from a copyrighted compilation of listings. The compilation of listings and each individual listingare ©2026 MIAMI Association of Realtors®. All Rights Reserved.
The information provided is for consumers’ personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Last Updated: 2026-09-20 09:05:08 UTC

Key Biscayne, FL community profile

Population: 15,327
Median income: $154,457
Housing units: 7,079
People per sq. mi.: 982.5
Area: 15.6 sq. mi.

Source: HJN community data

Key Biscayne housing market

August 2026 · This period is still settling

Selling at 95.9% of asking price

Buyers here are paying below asking. MLS · 22 sales · as of Aug 27, 2026

Registered offenders on the map

Registered offenders on the map

Registered offenders on the map

Registered offenders on the map

Your Key Biscayne agent

Your Key Biscayne agent

Your Key Biscayne agent

Listing data & MLS disclosures

Key Biscayne housing market

Key Biscayne, FL community profile

Explore Key Biscayne homes

Your Key Biscayne agent

Listing data & MLS disclosures

Key Biscayne, FL community profile

Key Biscayne housing market