Key Biscayne Homes for Sale Between $10,000,000 and $20,000,000

See what a budget between $10,000,000 and $20,000,000 really buys in Key Biscayne, and what it costs to own, before you commit.

Every home, condo and townhome currently for sale in Key Biscayne, Florida between $10,000,000 and $20,000,000, straight from BeachesMLS and updated throughout the day.

16 listings, newest first.

The 16 listings on this page run from $11,750,000 to $19,800,000, with a median of $18,500,000, about $2,753 per square foot, and they have been listed a median of 100 days.

The communities with the most listings here are Cape Florida Sub (4), Cape Fla Sub (3), Grand Bay Residences Cond (2), Mashta Island (2) and Oceana Key Biscayne (2), 13 of the 16; the others are spread across 3 more communities. By type: 11 single-family homes, 4 condos and 1 townhome or villa. Bedrooms run from 4 to 7, a median of 5; they were built between 1958 and 2025, a median of 2005, and 5 in the last ten years. 13 of the 16 have a pool, and 16 are on the water.

Ask About These Key Biscayne

Tell us which of these homes you want to see, or what you are looking for that is not here, and a Key Biscayne agent replies with the homes that fit, the questions to ask about each and a time to see them. Call or text (786) 914-1017 or send the form on this page.

Get New Key Biscayne Homes Between $10,000,000 and $20,000,000 Before You Miss Them

Well priced homes can go under contract quickly. Leave your email on this page and BreakThru Realty sends you each new listing that matches this exact search, straight from the MLS, as it comes on the market. You can also save the search, ask about a home, schedule a showing or call an agent from this page.

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A value range built from comparable Key Biscayne sales, with the reasoning
Whether a buyer already working with BreakThru Realty is looking for a property like yours
The plan that reaches the rest of the market if no buyer on file fits
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Your timing, privacy and goals, worked through before anything is listed

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Every home, condo and townhome for sale in Key Biscayne, straight from the MLS and updated through the day. Find my Key Biscayne home.

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