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5 Bedroom Homes in Key Biscayne, FL

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2 of 28 Listings

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2 of 28 Listings

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5 Bedroom Homes in Key Biscayne, FL — Page 2

28 listings

5 Bedroom Homes in Key Biscayne, FL

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2 of 28 Listings

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5 Bedroom Homes in Key Biscayne, FL

2 of 28 Listings

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

52Active

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

$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

Price Reduced100Active

$7,950,000

5 bd · 5 ba · 4,166 sqft

545 Sabal Palm, Key Biscayne, FL

Brigitte De Langeron · DLS International Realty

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

1 2

Listing data & MLS disclosures

MiamiSouthFlorida: Listing information provided by MiamiSouthFlorida.

Key Biscayne housing market

October 2026 · This period is still settling

Selling at 94.1% of asking price

Buyers here are paying below asking. MLS · 10 sales · as of Oct 30, 2026

Homes on the market · MLS, as of Oct 18, 2026

Median list price: $2,625,000
Homes for sale: 134

Housing stock — every home in the area, not only the ones selling or listed · Assessor records, as of Sep 30, 2026

Median home size: 1,835 sq. ft.

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

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L. Custen Realty, Inc. d/b/a Realty.com/L. Custen Realty CT, LLC d/b/a Realty.com (Tom O’Leary-Broker)(CT properties only), 8323 Southwest Freeway, Suite 900, Houston, Texas 77074

The information provided by this website is for the personal, non-commercial use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Listing data is derived from various Multiple Listing Services; each source MLS and its required disclaimer are shown with the listings on the applicable page. Realty.com is an independently owned and operated brokerage.

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

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

October 2026 · This period is still settling

Selling at 94.1% of asking price

Buyers here are paying below asking. MLS · 10 sales · as of Oct 30, 2026

Homes on the market · MLS, as of Oct 18, 2026

Median list price: $2,625,000
Homes for sale: 134

Housing stock — every home in the area, not only the ones selling or listed · Assessor records, as of Sep 30, 2026

Median home size: 1,835 sq. ft.