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Homes Over $3M in Key Biscayne, FL

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14 of 125 Listings

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14 of 125 Listings

45Active

Homes Over $3M in Key Biscayne, FL — Page 4

125 listings

Homes Over $3M in Key Biscayne, FL

Hide Map

14 of 125 Listings

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Homes Over $3M in Key Biscayne, FL

14 of 125 Listings

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

45Active

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

$7,490,000

5 bd · 7 ba · 3,768 sqft

571 Glenridge Rd, Key Biscayne, FL

Dora Puig · Luxe Living 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

Price Reduced93Active

$17,900,000

5 bd · 6 ba · 4,764 sqft

350 Ocean Dr Unit Lph2N, Key Biscayne, FL

Giulietta Ulloa · BHHS EWM Realty

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

47Active

$18,500,000

5 bd · 6 ba · 4,566 sqft

799 Crandon Blvd Ph-8, Key Biscayne, FL

Natalia Anda · Coldwell Banker Realty

22Active

$8,500,000

6 bd · 7 ba · 4,190 sqft

238 Buttonwood Dr, Key Biscayne, FL

Fernanda Moreno · Douglas Elliman

82Active

$237,000,000

5 bd · 9 ba · 11,528 sqft

485 W Matheson Dr, Key Biscayne, FL

Jill Eber · Coldwell Banker Realty

85Active

$3,549,000

3 bd · 3 ba · 2,510 sqft

791 Crandon Blvd 404, Key Biscayne, FL

Victor Florencio Sanchez · Ocean Club Realty, Inc.

Price Reduced45Active

$19,450,000

6 bd · 7 ba · 6,208 sqft

120 Knollwood Dr, Key Biscayne, FL

Francoise Teixier · Cervera Real Estate Inc.

Price Reduced39Active

$5,378,000

4 bd · 4 ba · 3,549 sqft

690 Warren Ln, Key Biscayne, FL

Brigitte Nachtigall · One Sotheby's International Realty

50Active

$3,340,000

3 bd · 3 ba · 2,510 sqft

791 Crandon Blvd 302, Key Biscayne, FL

Elena Chacon · BHHS EWM Realty

46Active

$6,950,000

5 bd · 6 ba · 5,421 sqft

685 Harbor Ln, Key Biscayne, FL

Marisela Gonzalez Servat · Avanti Way Realty LLC

Price Reduced61Active

$3,690,000

5 bd · 4 ba · 2,700 sqft

524 Warren Ln, Key Biscayne, FL

Fabrice Ernandes · Serhant

38Active

$16,800,000

4 bd · 4 ba · 3,620 sqft

640 S Mashta Dr, Key Biscayne, FL

Brigitte De Langeron · DLS International Realty

Price Reduced64Active

$4,899,000

5 bd · 6 ba · 4,220 sqft

24 Grand Bay Estates Circle, Key Biscayne, FL

Anthony D Vlahovic · Engel & Voelkers Vero Beach

1…3 4 5 6

Listing data & MLS disclosures

MiamiSouthFlorida: Listing information provided by MiamiSouthFlorida.
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: 2026-11-01 21:04:44 UTC

Key Biscayne housing market

October 2026 · This period is still settling

Selling at 94.2% of asking price

Buyers here are paying below asking. MLS · 18 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

Listing data & MLS disclosures

MiamiSouthFlorida: Listing information provided by MiamiSouthFlorida.
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: 2026-11-01 21:04:44 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

October 2026 · This period is still settling

Selling at 94.2% of asking price

Buyers here are paying below asking. MLS · 18 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.