Design & Real Estate

Island Triumph

Graber Realty Group just completed another record-breaking sale in Key Biscayne with “Heaven On Earth” at 640 South Mashta Drive — sold for $12.375 million for land value alone — making it one of the highest dollar per sq. ft. “tear down” sales in the island’s history.
Words // Yoshi Sanz | March 25, 2025 | Design & Real Estate

Realtor: Shane Graber; 305.606.2200; [email protected]; GraberRealty.com

The former waterfront home of renowned entrepreneur and socialite, the late Joan Ambrose, originally from New York, this home is located on exclusive, quiet Mashta Island. Although the home will be razed for new construction, the location itself offers breathtaking views of Biscayne Bay, spanning from Stiltsville to Deering Bay and Coconut Grove.

With a grandfathered deep dock and stunning sunset views from 100 feet of direct Biscayne Bay waterfront, this iconic trophy property sits on a 15,000 sq. ft. lot. An entertainer’s delight, the home was known for intimate gatherings and great celebrations, including the annual Key Biscayne Yacht Club Holiday Boat Parade soiree.