Key Biscayne Homes for Sale | Houses, Townhomes & Estates

$237,000,000

$20,559 per sq ft

485 W Matheson Dr

Key Biscayne, FL

5 beds8 baths11,528 sq ft

103,775 sq ft lotBuilt 1981

Single Family Home

$27,900,000

$3,046 per sq ft

241 Cape Florida Dr

Key Biscayne, FL

8 beds8.5 baths9,159 sq ft

21,000 sq ft lotBuilt 1990

Single Family Home

$19,800,000

$2,403 per sq ft

100 Cape Florida Dr

Key Biscayne, FL

4 beds7 baths8,240 sq ft

16,500 sq ft lotBuilt 2007

Single Family Home

$19,750,000

$3,053 per sq ft

1080 Mariner Dr

Key Biscayne, FL

6 beds6.5 baths6,468 sq ft

12,900 sq ft lotBuilt 2018

Single Family Home

$19,450,000

$3,133 per sq ft

120 Knollwood Dr

Key Biscayne, FL

6 beds6.5 baths6,208 sq ft

16,827 sq ft lotBuilt 2018

Single Family Home

$19,450,000

$2,994 per sq ft

550 Harbor Dr

Key Biscayne, FL

7 beds7.5 baths6,497 sq ft

23,000 sq ft lotBuilt 2003

Single Family Home

$19,450,000

$2,512 per sq ft

960 Mariner Dr

Key Biscayne, FL

6 beds9 baths7,742 sq ft

15,381 sq ft lotBuilt 2025

Single Family Home

$18,500,000

$5,997 per sq ft

520 S Mashta Dr

Key Biscayne, FL

5 beds4 baths3,085 sq ft

22,140 sq ft lotBuilt 1961

Single Family Home

$18,500,000

$8,204 per sq ft

631 N Mashta Drive

Key Biscayne, FL

4 beds4.5 baths2,255 sq ft

15,000 sq ft lotBuilt 1958

Single Family Home

$16,800,000

$4,641 per sq ft

640 S Mashta Dr

Key Biscayne, FL

4 beds4 baths3,620 sq ft

15,000 sq ft lotBuilt 1968

Single Family Home

$16,500,000

$2,323 per sq ft

131 Cape Florida Dr

Key Biscayne, FL

6 beds6.5 baths7,103 sq ft

14,900 sq ft lotBuilt 2022

Single Family Home

$14,490,000

$2,175 per sq ft

161 Cape Florida Drive

Key Biscayne, FL

4 beds5 baths6,661 sq ft

14,500 sq ft lotBuilt 1983

Single Family Home

$12,485,000

$1,949 per sq ft

420 Island Dr

Key Biscayne, FL

6 beds7 baths6,405 sq ft

13,651 sq ft lotBuilt 2017

Single Family Home

$11,750,000

$2,316 per sq ft

110 Reef Ln #10

Key Biscayne, FL

7 beds5.5 baths5,074 sq ft

Built 2014

Villa

$9,950,000

$2,292 per sq ft

360 Harbor Ln

Key Biscayne, FL

6 beds5.5 baths4,341 sq ft

9,300 sq ft lotBuilt 2025

Single Family Home

$9,800,000

$1,682 per sq ft

31 Island Dr

Key Biscayne, FL

6 beds6.5 baths5,826 sq ft

19,236 sq ft lotBuilt 2004

Single Family Home

$8,500,000

$2,029 per sq ft

238 Buttonwood Dr

Key Biscayne, FL

6 beds6.5 baths4,190 sq ft

8,916 sq ft lotBuilt 2026

Single Family Home

$8,000,000

$7,663 per sq ft

544 Warren Ln

Key Biscayne, FL

6 beds5.5 baths1,044 sq ft

7,828 sq ft lotBuilt 2026

Single Family Home

$7,950,000

$1,908 per sq ft

545 Sabal Palm

Key Biscayne, FL

5 beds4.5 baths4,166 sq ft

9,633 sq ft lotBuilt 2012

Single Family Home

$7,599,000

$1,909 per sq ft

315 Cypress Dr

Key Biscayne, FL

6 beds7 baths3,980 sq ft

8,039 sq ft lotBuilt 2023

Single Family Home

$7,490,000

$1,988 per sq ft

571 Glenridge Rd

Key Biscayne, FL

5 beds6 baths3,768 sq ft

7,329 sq ft lotBuilt 2025

Single Family Home

$7,450,000

$1,632 per sq ft

425 Harbor Dr

Key Biscayne, FL

7 beds8 baths4,565 sq ft

9,258 sq ft lotBuilt 2020

Single Family Home

$7,175,000

$1,775 per sq ft

741 Harbor Dr

Key Biscayne, FL

6 beds5.5 baths4,043 sq ft

7,924 sq ft lotBuilt 2016

Single Family Home

$6,950,000

$1,282 per sq ft

685 Harbor Ln

Key Biscayne, FL

5 beds5.5 baths5,421 sq ft

9,000 sq ft lotBuilt 2001

Single Family Home