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FBI: state sex-offender registry directory

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4 Bedroom Homes in Key Biscayne, FL

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7 of 35 Listings

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Price Reduced39Active

4 Bedroom Homes in Key Biscayne, FL — Page 2

35 listings

4 Bedroom Homes in Key Biscayne, FL

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7 of 35 Listings

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4 Bedroom Homes in Key Biscayne, FL

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Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

Price Reduced39Active

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

$5,378,000

4 bd · 4 ba · 3,549 sqft

690 Warren Ln, Key Biscayne, FL

Brigitte Nachtigall · One Sotheby's International Realty

38Active

$16,800,000

4 bd · 4 ba · 3,620 sqft

640 S Mashta Dr, Key Biscayne, FL

Brigitte De Langeron · DLS International Realty

38Active

$4,500,000

4 bd · 4 ba · 2,825 sqft

199 Ocean Lane Dr 401, Key Biscayne, FL

Florencia Yagodnik · Swann Realty Partners, LLC.

Your Key Biscayne agent

Jonathan Alfonso

Portal Real Estate

Lic. #3306632

Call Jonathan

38Active

$4,500,000

4 bd · 4 ba · 2,825 sqft

199 Ocean Lane Dr Unit 401, Key Biscayne, FL

Florencia Yagodnik · Swann Realty Partners, LLC.

68Active

$19,800,000

4 bd · 9 ba · 8,240 sqft

100 Cape Florida Dr, Key Biscayne, FL

Lucia Marin · One Sotheby's International Realty

Price Reduced41Active

$8,950,000

4 bd · 7 ba · 3,798 sqft

350 E Ocean Dr 301N, Key Biscayne, FL

Kinga Konsorska · Douglas Elliman

Price Reduced67Active

$3,800,000

4 bd · 4 ba · 3,403 sqft

691 Ridgewood Rd, Key Biscayne, FL

Felipe Franco · BHHS EWM Realty

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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: 2026-10-19 14:04:42 UTC

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

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: 2026-10-19 14:04:42 UTC

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