A house in Key Biscayne that sold for $18.9 million tops the list of the most expensive residential real estate sales in Miami-Dade County in the past week.
In total, 954 residential real estate sales were recorded in the county during the past week, with an average price of $962,989, or $587 per square foot.
The prices in the list below include real estate sales where the title was recorded during the week of Aug. 4 even if the property may have been sold earlier.

10. $8 million, single-family house at 1740 South Bayshore Lane
The detached house at 1740 South Bayshore Lane in Miami has new owners. The price was $8,000,000. The house was built in 1990 and has a living area of 7,012 square feet. The price per square foot was $1,141. The house features 3 bedrooms and 3 bathrooms.
9. $8.9 million, condominium at 17975 Collins Ave.
A 3,854-square-foot condominium at 17975 Collins Ave. in Sunny Isles Beach, has been sold. The total purchase price was $8,900,000, $2,309 per square foot. The condominium was built in 2023. The condominium features 4 bedrooms and 6 bathrooms.

8. $9.4 million, single-family residence at 6350 Southwest 112th Street
A single-family home at 6350 Southwest 112th Street in Pinecrest, has been sold. The price was $9,370,000. The house was built in 1956 and has a living area of 3,498 square feet. The price per square foot was $2,679. The house features 3 bedrooms and 3 bathrooms.
7. $11 million, single-family home at 3918 Island Estates Drive
A 5,132-square-foot detached house at 3918 Island Estates Drive in Aventura has been sold. The price was $11,029,400, $2,149 per square foot. The house was built in 2002. The house features 5 bedrooms and 5 bathrooms.
6. $12.3 million, condominium at 8955 Collins Ave.
The property at 8955 Collins Ave. in Surfside has new owners. The price was $12,250,000. The condominium was built in 2020 and has a living area of 2,824 square feet. The price per square foot was $4,338. The condominium features 3 bedrooms and 4 bathrooms.
5. $12.5 million, condominium at 6800 Fisher Island Drive
A sale has been finalized for a condominium at 6800 Fisher Island Drive in Miami Beach. The price was $12,500,000. The condo was built in 2019 and the living area totals 4,757 square feet. The price per square foot ended up at $2,628. The condominium features 4 bedrooms and 5 bathrooms.
4. $13.4 million, single-family home at 6644 Windsor Lane
The sale of the single-family house at 6644 Windsor Lane in Miami Beach has been finalized. The price was $13,350,000. It was built in 1957 and has a living area of 3,826 square feet. The price per square foot was $3,489. The house features 5 bedrooms and 5 bathrooms.
3. $14.5 million, single-family residence at 501 Arvida Parkway
A 3,938-square-foot detached house at 501 Arvida Parkway in Coral Gables, has been sold. The total purchase price was $14,500,000, $3,682 per square foot. The house was built in 1966. The house features 4 bedrooms and 3 bathrooms.
2. $18.5 million, single-family residence at 6580 Allison Road
The sale of the single-family home at 6580 Allison Road in Miami Beach has been finalized. The price was $18,500,000. It was built in 2001 and has a living area of 6,924 square feet. The price per square foot was $2,672. The house features 5 bedrooms and 6 bathrooms.

1. $18.9 million, single-family house at 510 South Mashta Drive
A 5,226-square-foot single-family house at 510 South Mashta Drive in Key Biscayne has been sold. The price was $18,921,300, $3,621 per square foot. The house was built in 1981. The house features 3 bedrooms and 4 bathrooms.