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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

46Active

Homes Over $3M in Key Biscayne, FL — Page 2

125 listings

Homes Over $3M in Key Biscayne, FL

Hide Map

14 of 125 Listings

Map

Homes Over $3M in Key Biscayne, FL

14 of 125 Listings

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

46Active

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

$11,750,000

7 bd · 6 ba · 5,074 sqft

110 Reef Ln 10, Key Biscayne, FL

Bento Queiroz · Compass Florida, LLC

39Active

$3,975,000

3 bd · 5 ba · 3,093 sqft

781 Crandon Blvd 401, Key Biscayne, FL

Brigitte Nachtigall · One Sotheby's International Realty

86Active

$5,490,000

4 bd · 6 ba · 3,581 sqft

799 Crandon Blvd 202, Key Biscayne, FL

Victor Florencio Sanchez · Ocean Club Realty, Inc.

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

35Active

$3,900,000

4 bd · 4 ba · 2,930 sqft

430 Grand Bay Dr Unit 606, Key Biscayne, FL

Saddy Delgado PA · One Sotheby's International Realty

36Active

$3,950,000

4 bd · 5 ba · 3,250 sqft

445 Grand Bay Dr Unit 104, Key Biscayne, FL

Cristina Diez · Compass Florida, LLC.

35Active

$3,900,000

4 bd · 4 ba · 2,930 sqft

430 Grand Bay Dr 606, Key Biscayne, FL

Saddy Delgado PA · One Sotheby's International Realty

36Active

$3,950,000

4 bd · 5 ba · 3,250 sqft

445 Grand Bay Dr 104, Key Biscayne, FL

Cristina Diez · Compass Florida, LLC.

50Active

$3,300,000

4 bd · 3 ba · 2,448 sqft

548 Fernwood Rd 548, Key Biscayne, FL

Alejandra Gil · Florida Realty of Miami Corp

73Active

$4,500,000

4 bd · 3 ba · 2,689 sqft

475 Woodcrest Rd, Key Biscayne, FL

Alejandra Gil · Florida Realty of Miami Corp

Price Reduced41Active

$5,480,000

5 bd · 5 ba · 3,197 sqft

755 Curtiswood Dr, Key Biscayne, FL

Pablo Rodriguez · Scale Commercial Realty

52Active

$16,500,000

6 bd · 7 ba · 7,103 sqft

131 Cape Florida Dr, Key Biscayne, FL

Lucas Boccheciampe · Vantage Real Estate LLC

12Active

$3,300,000

3 bd · 2 ba · 1,554 sqft

119 Harbor Dr, Key Biscayne, FL

Bruno Ricci · Fortune Christie's International Real Estate

59Active

$8,000,000

6 bd · 6 ba · 1,044 sqft

544 Warren Ln, Key Biscayne, FL

James Duncan · Duncan Studio Real Estate Division PLLC

41Active

$5,990,000

5 bd · 5 ba · 4,759 sqft

501 Bay Lane, Key Biscayne, FL

Brigitte Nachtigall · One Sotheby's International Realty

1 2 3…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: 2026-10-28 18:16:04 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: 2026-10-28 18:16:04 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.