6+ Bedroom Homes in Key Biscayne, FL

11 homes for sale · Updated August 12, 2026

• 31 island drive, Key Biscayne 33149 $9,800,000 · 6 bd · 7 ba · 5,826 sqft
• 550 harbor drive, Key Biscayne 33149 $19,450,000 · 7 bd · 8 ba · 6,497 sqft
• 120 knollwood drive, Key Biscayne 33149 $19,950,000 · 6 bd · 7 ba · 6,208 sqft
• 650 curtiswood drive, Key Biscayne 33149 $5,199,000 · 6 bd · 5 ba · 3,356 sqft
• 420 island drive, Key Biscayne 33149 $12,485,000 · 6 bd · 8 ba · 6,405 sqft
• 960 mariner drive, Key Biscayne 33149 $19,500,000 · 6 bd · 10 ba · 7,742 sqft
• 110 hampton lane, Key Biscayne 33149 $6,900,000 · 6 bd · 7 ba · 3,550 sqft
• 165 hampton lane, Key Biscayne 33149 $8,250,000 · 6 bd · 9 ba · 3,842 sqft
• 260 cape florida drive, Key Biscayne 33149 $29,500,000 · 9 bd · 10 ba · 10,964 sqft
• 238 buttonwood drive, Key Biscayne 33149 $8,500,000 · 6 bd · 7 ba · 4,190 sqft
• 425 harbor drive, Key Biscayne 33149 $7,450,000 · 7 bd · 9 ba · 4,565 sqft