The Best Key Biscayne Waterfront Homes for Sale

The Best Waterfront Key Biscayne Homes for Sale

Key Biscayne is one of Miami’s most exclusive residential areas. This 12-mile long island just off the coast of Brickell and Coconut Grove provides for luxurious waterfront homes as well as high-end Key Biscayne condos. Apart from its superb real estate options, the island is desired for its high-end lifestyle, safety, and the presence of one of Miami’s best public schools.

Key Biscayne homes are very desired by boaters because many of them are waterfront. Key Biscayne waterfront homes for sale are right on the ocean or on one of the canals with fast access to the ocean without any bridges in the way.

The Best Key Biscayne Waterfront Homes for Sale. DSG

In the last 18 Months (2016 and 2017 till June incl.)  the most affordable non-waterfront home sold for $1.25M while the most affordable waterfront home in Key Biscayne sold for $4.5M.

Current listings start at $1.4M for a home on a dry lot while Key Biscayne waterfront homes start selling at $4.6M

The Most Exclusive Key Biscayne Waterfront Homes For Sale

Please find below the most exclusive waterfront homes for sale in Key Biscayne. For more information on these Key Biscayne Mansions for Sale please contact David Siddons at +1.305.508.0899

7 Harbor Point

10,776 SF | 22,860 SF Lot | 7 Bedrooms | 9 Bathrooms
Listed for $20M

Broker Remarks:  Premier ultimate privacy, breathtaking ocean views, Private Beach & Private Dock, situated on Key Biscayne’s most exclusive & sought after street Harbor Point. This ultra-luxury modern Island Fusion residence provides the rare combination offering the finest in luxury living. Dramatic double height atrium welcoming you to 7 bedrooms, 9.5 bathrooms. Sleek and modern bar in the interior & two story cabana with Nana walls on the gorgeous infinity pool deck provide the optimal entertaining experience.

500 S Mashta Dr

11,149 SF | 23,814 SF Lot | 6 Bedrooms | 6 Bathrooms
Listed for $21M

Broker Remarks: Enjoy ocean and sunset views from this 2014 Mashta Island estate on a 23,814 SqFt oversized lot with 138 ft of water frontage. This custom-built home, inspired by Modern architect Richard Meier, features pure geometric lines and integrated open spaces with an emphasis on natural light. Unique features include a 3-story curved glass curtain wall, 14 skylights over a 27-ft high atrium, Nana Wall folding glass doors, elevator, gym, dock, staff quarters, 4-car garage, generator and smart home technology.


10,993 SF | 27,300 SF Lot | 8 Bedrooms | 8 Bathrooms
Listed for $21.5M

Broker Remarks: Enjoy breathtaking views of Biscayne Bay to downtown Miami from this unique and spectacular Florida tropical vernacular home designed by renowned architect Cesar Molina. Located on one of Key Biscayne’s most spectacular and private streets, this home with no expense spared and unparalleled details boasts custom handcrafted woodwork, impact glass, integrated terrazzo, fine wood and marble flooring throughout, Lutron lighting, generator, dock with lift, private beach entry, separate guest house with 4 car garage.

960 Harbor Dr

12,520 SF | 67,000 SF Lot | 9 Bedrooms | 10 Bathrooms
Listed for $33M

Broker Remarks: Two times larger then any property for sale on Key Biscayne, Buena Vista is a One-of-a-Kind sprawling compound on over 67,000 SF of lush sub-tropical grounds. The ultimate in privacy and recent ‘Home of The Day’ in The Wall Street Journal sits on a 1.67 acre peninsula with 720 ft of water frontage. The over 12k SF Home has unobstructed views of both the 440 acre Bill Baggs State Park and Key Biscayne Bay. The property has a Open Air Caribbean Style Cabana House, 16 seat private theatre/screening room, tennis and a deep water dock accommodates a 100+ ft. yacht.

400 S Mashta Dr

9,619 SF | 36,355 SF Lot | 5 Bedrooms | 6 Bathrooms
Listed for $34M

Broker Remarks: Coined The 1000 Year House by renowned architect Charles Pawley. Strategically built on a 36,355 SF peninsula with 480 feet of waterfront on prestigious Mashta Island. Unimpeded wide panoramic views of the ocean, Bill Baggs Park, Cape FL Light House and Stiltsville. This 9,619 SF home is comprised of 5 bedrooms and 6.5 bathrooms which include 2 master bedrooms, a theater, a gym, a library and staff quarters. Covered gazebo and massive terraces with a resort pool/spa.  Protected deep water dock accommodates a 100+ ft. yacht.

These are just a handful of homes for sale. Click on the link to see all on Key Biscayne Waterfront homes for sale

David Siddons is a top producing Miami Realtor who specializes in the Miami luxury market. David is known for his honest opinions and market analytics. He has written several investment guides for the Miami real estate market and has been quoted and interviewed by Bloomberg, The Miami Herald, CNBC, The Real Deal and Curbed

David Siddons | | +1.305.508.0899


For all our analytics we are agents driving some very unique and advanced tech. We Provide a granular and custom experience that empower our clients with the insight and tools to understand the most complex behaviors of any local markets.

  • Analytical

    Over 100 reports produced to date

  • Knowledgeable

    Over 1800 published articles and counting

  • Experienced

    Over $2 billion in real estate sales

David Siddons
Akbota YerseitAkbota Yerseit
13:29 03 Jun 22
Excellent leaders!
Cathryne HaladnerCathryne Haladner
12:12 18 Sep 21
We have only superlatives to describe how wonderful Cris Buzolin was throughout the process of selling our townhouse in Coral Gables. We were away in the UK while the transaction was taking place and Cris handled everything-from clearing out our house, selling contents when she could, arranging the moving and storage and dealing with some very difficult problems which arose. Always patient and very willing to help in every way, Cris is a consummate professional who really cares about her clients and worked extremely hard to get the price we had asked for and make things for us as easy as she could. Nothing was too much for her to handle.Cris and Marianela (who provided additional very helpful assistance to us during the transaction) are part of the team that David Siddons has assembled.When we decided to sell our property, we contacted David and he established the framework for the transaction and ensured that everything proceeded smoothly and in accordance with our wishes. In sum, David Siddons and his team are extremely competent and professional and we are totally satisfied with the service they provided. To repeat, Cris Buzolin in particular, went way beyond what one would expect from a real estate agent. The David Siddons Group has our highest recommendation!
Jose Eduardo FilhoJose Eduardo Filho
17:17 13 Jul 21
I thank the whole team and especially Cris Buzolin who, in a very professional and competent way, helped me to sell my property safely and in the best market condition.
Idan Singh (Idan)Idan Singh (Idan)
19:53 07 Jun 21
Great Service for British Expats looking to move to the States.
Simone GarrettSimone Garrett
17:20 26 Feb 21
Fantastic group of people to work with!! David and Adriana were responsive and professional throughout the entire process. We weren't familiar with South Florida so David took us under his wing and did a fabulous job giving us a tour of select neighborhoods in South Florida and shared a great deal of information about each. We fell in love with the Botaniko community in Weston and closed the deal with Adriana. If you are buying/selling this is the team you want to work with!! Thank you guys for helping us find our dream home.