$18,500,000list price
Per sq ft$4,052
5 bd · 5.5 ba · 4,566 sq ft Condo or villa
799 CRANDON BLVD #PH8, KEY BISCAYNE, FL 33149
Listing courtesy of Coldwell Banker Realty. MLS# A12027629.On the MLS · Listed May 26
$18,900,000
445 GRAND BAY DR #PH1A, KEY BISCAYNE, FL 33149
5 beds5.5 baths8,435 sq ftCondo or villaBuilt 1997
Updated today, November 3, 2026This home against Key Biscayne
$2,241 per sq ft, 84% over the Key Biscayne median
264 days on the market
$54,141 in property taxes (2025)
Waterfront
Key Biscayne today: 129 homes for sale, median list price $2,725,000.
About this home
High above the turquoise waters of Key Biscayne rises a penthouse that simply cannot be replicated. Once featured in Architectural Digest, this legendary corner residence at Grand Bay is a statement of scale, design, and presence. From sunrise over the Atlantic to glittering sunsets across Biscayne Bay and the Miami skyline, the views are cinematic in every direction, offering endless blue water, golden light, and exceptional privacy. Spanning an extraordinary 8,435 square feet under air and 2,825 square feet of terraces, totaling 11,260 square feet as per the developer’s floor plan, the residence is defined by soaring 12-foot ceilings and grand proportions throughout. A dramatic foyer leads to a spectacular Grand Room designed for both intimate living and large-scale entertaining. The formal dining room is separate and elegant, while the completely remodeled kitchen and family room provide comfort and functionality. The fully renovated private library and custom bar enhance the home’s entertaining appeal. The primary suite is serene and expansive. All the bathrooms have just been completely remodeled, offering a fresh spa-inspired experience finished to today’s highest standards. Four (4) additional en-suite bedrooms ensure comfort and privacy. The terraces offer expansive outdoor living in the sky, perfect for sunrise mornings and sunset evenings overlooking the water and skyline. This is not simply a penthouse. It is a landmark residence, rare and impossible to duplicate.
Zoned schools
Elementary: Key Biscayne K-8 Center
Middle: Ponce de Leon Middle School
High: Coral Gables Senior High School
From Miami-Dade County Public Schools attendance zones.
Listing courtesy of One Sotheby's International Realty. MLS# A11954185.
Listing information is provided by the MLS and is deemed reliable but not guaranteed.
Listed February 12, 2026.
Similar homes near KEY BISCAYNE
$17,900,000list price
Price cut$600,000
5 bd · 5.5 ba · 4,764 sq ft Condo or villa
350 OCEAN DR #LPH2N, KEY BISCAYNE, FL 33149
Listing courtesy of BHHS EWM Realty. MLS# A12027002.On the MLS · Listed May 26
$18,500,000list price
Price cut$1,400,000
5 bd · 4 ba · 3,085 sq ft House
520 S MASHTA DR #33149, KEY BISCAYNE, FL 33149
Listing courtesy of Coldwell Banker Realty. MLS# A12071221.On the MLS · Listed Aug 10
5 photos$18,500,000list price
Per sq ft$8,204
4 bd · 4.5 ba · 2,255 sq ft House
631 N MASHTA DR #33149, KEY BISCAYNE, FL 33149
Listing courtesy of Coldwell Banker. MLS# B26058354.On the MLS · Listed Jul 29
$19,450,000list price
Price cut$500,000
6 bd · 6.5 ba · 6,208 sq ft House
120 KNOLLWOOD DR #33149, KEY BISCAYNE, FL 33149
Listing courtesy of Cervera Real Estate Inc.. MLS# A12009875.On the MLS · Listed Apr 28
$19,800,000list price
Per sq ft$2,403
4 bd · 7 ba · 8,240 sq ft House
100 CAPE FLORIDA DR #33149, KEY BISCAYNE, FL 33149
Listing courtesy of One Sotheby's International Realty. MLS# A11934196.On the MLS · Listed Jan 5