398 Harbor DriveKey Biscayne, FL 33149Sale Price: $19,250,000

  • Sale Price: $19,250,000
  • 845 Days Since Sale
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Federal 30-year interest rate: 6.71% last updated on Sep 3, 2026
* All Figures are estimates. Check with your bank or proposed mortgage company for actual interest rates.
This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.
  • $19,250,000Sale Price
  • 3Bedrooms
  • 3Full Bath
  • 1,806Square Feet
  • 20,933Lot Size Square Feet

Listing Tools

Truly a trophy property ready to be developed.The original cottage on this unique 20,933 sq. ft. lot, is nestled among some of the most coveted stately homes of Key Biscayne. It may be lived in while your new house project is ready. Watch the endless parade of boats as they cruise the shimmering waters of Biscayne Bay, or simply enjoy the spectacle of the always changing color palette of Miami Sunsets and night lights. Watch an assortment of marine life stop by to greet you while you lounge in your bayfront backyard.The Key is a short ride away -10 to 15 minutes – from the excitement of Downtown Miami and the Beaches, as well as a 20 minutes ride to Miami International Airport and Miami Executive private airport, yet the Key feels so far away.

Property Details of 398 Harbor Drive

Property Details

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Mortgage Calculator


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Est. Mortgage:
$/month over payments
Federal 30-year interest rate: 6.71% last updated on Sep 3, 2026. * The above figures are estimates provided by Union Street Media using the FRED® API, and are not endorsed or certified by the Federal Reserve Bank of St. Louis. Check with your lender for actual interest rates.
Listed by Carlos Coto of One Sotheby's International Realty

Listing Sold by One Sotheby's International Realty

The multiple listing information is provided by Miami Association of REALTORS® from a copyrighted compilation of listings. The compilation of listings and each individual listing are © 2026 Miami Association of REALTORS®. All Rights Reserved. The information provided is for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Data last updated on September 4, 2026

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