Key Biscayne 12-month median sale price trend

33 listings

Single-Family Homes in Key Biscayne, FL

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24 of 33 Listings

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Single-Family Homes in Key Biscayne, FL

24 of 33 Listings

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

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

38Active

$19,900,000

5 bd · 4 ba · 3,085 sqft

520 S Mashta Dr, Key Biscayne, FL

Maureen Jauregui · Coldwell Banker Realty

Price Reduced100Active

$27,900,000

8 bd · 9 ba · 9,159 sqft

241 Cape Florida Dr, Key Biscayne, FL

Rosa Nelly Minano · Cervera Real Estate Inc.

42Active

$14,990,000

4 bd · 6 ba · 6,661 sqft

161 Cape Florida Drive, Key Biscayne, FL

Brigitte Nachtigall · One Sotheby's International Realty

48Active

$18,500,000

4 bd · 5 ba · 2,255 sqft

631 N Mashta Drive, Key Biscayne, FL

Javier Gustavo Quiroz · Coldwell Banker

50Active

$8,250,000

6 bd · 9 ba · 3,842 sqft

165 Hampton Ln, Key Biscayne, FL

Brigitte Nachtigall · One Sotheby's International Realty

41Active

$5,199,000

6 bd · 5 ba · 3,356 sqft

650 Curtiswood Dr, Key Biscayne, FL

Claudine Coto · One Sotheby's International Realty

39Active

$5,200,000

5 bd · 5 ba · 3,535 sqft

797 Glenridge Rd, Key Biscayne, FL

Camila Freytes De Marotta · Swann Realty Partners, LLC.

50Active

$7,450,000

7 bd · 9 ba · 4,565 sqft

425 Harbor Dr, Key Biscayne, FL

Mark Chatburn · One Sotheby's International Realty

48Active

$9,200,000

5 bd · 6 ba · 4,416 sqft

625 Curtiswood Dr, Key Biscayne, FL

Jennifer Molina · One Sotheby's International Realty

45Active

$7,490,000

5 bd · 7 ba · 3,768 sqft

571 Glenridge Rd, Key Biscayne, FL

Dora Puig · Luxe Living Realty

13Active

$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

30Active

$3,550,000

4 bd · 3 ba · 2,177 sqft

255 Ridgewood Rd, Key Biscayne, FL

Maria Parra Loughlin · Compass Florida, LLC.

45Active

$19,950,000

6 bd · 7 ba · 6,208 sqft

120 Knollwood Dr, Key Biscayne, FL

Francoise Teixier · Cervera Real Estate Inc.

39Active

$5,478,000

4 bd · 4 ba · 3,549 sqft

690 Warren Ln, Key Biscayne, FL

Brigitte Nachtigall · One Sotheby's International Realty

43Active

$6,395,000

5 bd · 6 ba · 4,003 sqft

760 Woodcrest Rd, Key Biscayne, FL

Xiomara Cortes · Compass Florida, LLC

45Active

$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

$3,730,000

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

$4,950,000

5 bd · 6 ba · 4,220 sqft

24 Grand Bay Estates Circle, Key Biscayne, FL

Anthony D Vlahovic · Engel & Voelkers Vero Beach

30Active

$5,995,000

5 bd · 6 ba · 3,762 sqft

561 Warren Ln, Key Biscayne, FL

Josefina Fiorito · Great Properties International LLC

Listing data & MLS disclosures

BeachesMLS: All listings featuring the BMLS logo are provided by Beaches MLS, Inc. This information is not verified for authenticity or accuracy and is not guaranteed. Information is provided exclusively for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Listing information ©2026 Beaches Multiple Listing Service®. All Rights Reserved. Data Last Updated: 2026-08-31 21:06:12 UTC
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: 2026-09-02 18:01:27 UTC

Key Biscayne housing market

June 2026

Selling at 94.0% of asking price

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

Homes that sold · County records, as of Jun 30, 2026

Median sale price: $1,390,000$843,750–$2,350,000 typical range
Price per sq. ft.: $858
Sales: 28
Paid in cash: 71.4%

Homes on the market · MLS, as of Jun 30, 2026

Median days on market: 31 days

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

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

Listing data & MLS disclosures

BeachesMLS: All listings featuring the BMLS logo are provided by Beaches MLS, Inc. This information is not verified for authenticity or accuracy and is not guaranteed. Information is provided exclusively for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Listing information ©2026 Beaches Multiple Listing Service®. All Rights Reserved. Data Last Updated: 2026-08-31 21:06:12 UTC
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: 2026-09-02 18:01:27 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

June 2026

Selling at 94.0% of asking price

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

Homes that sold · County records, as of Jun 30, 2026

Median sale price: $1,390,000$843,750–$2,350,000 typical range
Price per sq. ft.: $858
Sales: 28
Paid in cash: 71.4%

Homes on the market · MLS, as of Jun 30, 2026

Median days on market: 31 days

Price trend · Assessor repeat sales, as of Jun 30, 2026

Year-over-year: 3.7%

Registered offenders on the map

Registered offenders on the map

Registered offenders on the map

Your Key Biscayne agent

Listing data & MLS disclosures

Key Biscayne housing market

Homes that sold · County records, as of Jun 30, 2026

Homes on the market · MLS, as of Jun 30, 2026

Key Biscayne, FL community profile

Explore Key Biscayne homes

Your Key Biscayne agent

Your Key Biscayne agent

Your Key Biscayne agent

Listing data & MLS disclosures

Key Biscayne, FL community profile

Key Biscayne housing market

Homes that sold · County records, as of Jun 30, 2026

Homes on the market · MLS, as of Jun 30, 2026

Price trend · Assessor repeat sales, as of Jun 30, 2026