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550 Harbor Dr
Key Biscayne, FL, 33149
Active$19,450,000
550 Harbor Dr
Key Biscayne, FL, 33149
Active$19,450,000
7
Bedrooms
8
Bathrooms
6,497 sqft
Living Area
2003
Year Built
22,975
Lot Size (sqft)
252
Days on Market
Dock Score™
DockOnly90
ExcellentWhat shaped this score
✓Ocean Access
✓Dock present
✓No fixed bridges
✓Fits boats up to ~100ft+ (est.)
·Draft not independently verified
Est. waterfront~105 ft
DockOnly.com rating, not provided by the MLS or listing broker.
Dock & Water AccessMLS
Ocean AccessLagoonNavigable WaterNo Fixed Bridges
AI Aerial Imagery Detection
Dock DetectedSeawall DetectedDeep Water Indicators
Detected by AI from open-source aerial mapping imagery and may not reflect current conditions. This information was not provided by the MLS or listing broker. Always verify dock infrastructure with the listing agent.
Canal WidthDockOnly
At the dock
County parcel data349ft
Single measurement at the dock · width variation along the canal not yet available
Measured perpendicular from this parcel's waterfront edge to the parcel directly across the canal, using surveyed county GIS boundaries. Multiple waterfront edges detected (corner lot or dual frontage); reported value is the widest; verify with the listing agent.
Will it turn around?
Up to 161 ft
Easy
handling
161–215 ft
Fits
with care
215–248 ft
Tight
(back-in)
Boats over 248 ft typically back in/out rather than turning here. Clear channel ≈ 323 ft with boats moored both sides (~13 ft per side for dock + beam). Wide-beam yachts need the upper end of each range.
Navigation RouteDockOnly
Data sources: SFWMD AHED waterway polygons · FHWA National Bridge Inventory 2024 · Not provided by the MLS or listing broker.
Description
Situated on the exclusive island of Key Biscayne, this extraordinary 7,000sqft waterfront estate sits on a rare double lot located on Hurricane Harbor overlooking tranquil Manatee Lagoon. The property offers an unparalleled sanctuary of luxury and seclusion with features including a 4 car garage ideal for collectors, professionally landscaped yard well suited for outdoor entertaining, 7 bedrooms and 7.5 baths including live-in staff quarters. Expansive living areas flow seamlessly to large outdoor, covered porches becoming your al fresco living room for outdoor dining or relaxing and soaking in the beauty of the natural environment. As the sun hits the horizon, Sunsets light up the sky illuminating the clouds in a breathtaking array of tropical colors. Text listing agent. 24hr notice
Schedule a Showing
See the property and tour the dock. A licensed waterfront specialist will arrange your private showing.
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Location
Key Biscayne, FL, 33149
No price history available for this property.
Displayed by Blue Mar Real Estate Group Inc., Licensed Florida Real Estate Broker (DBPR CQ1018554) · [email protected]
Listing courtesy of Three Bridges Realty, LLC via MIAMI REALTORS®
Last checked: July 25, 2026
Listing updated: July 21, 2026
© 2026 Miami Association of REALTORS®, Inc. All rights reserved. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of the Miami Association of REALTORS®. Information is deemed reliable but not guaranteed. All properties are subject to prior sale, change, or withdrawal.
IDX information is provided exclusively for consumers' personal, non-commercial use. It may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Dock Score™
DockOnly90
ExcellentWhat shaped this score
✓Ocean Access
✓Dock present
✓No fixed bridges
✓Fits boats up to ~100ft+ (est.)
·Draft not independently verified
Est. waterfront~105 ft
DockOnly.com rating, not provided by the MLS or listing broker.
Loading nearby marinas…
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Nearby Schools
Assigned Public Schools
E
Key Biscayne K-8 Center
Grades PK-8 · Key Biscayne
M
Ponce de Leon MS
Grades 6-8 · Coral Gables
H
Coral Gables Senior High
Grades 9-12 · Coral Gables
Nearby Private Schools
St Agnes Academy0.8 mi
St Christophers - By-The-Sea Montessori School0.8 mi
School data from Miami-Dade County Open Data Hub. Verify attendance zones with the school district.
Mortgage Calculator
Estimate your monthly payment for this waterfront property
20%
$3,890,000 down
%
Principal & Interest$100,922/mo
Property Tax (est. ~1.2%, varies by county)$19,450/mo
Home Insurance (est.)$250/mo
Total Monthly Payment$120,622
Loan Amount: $15,560,000Rate: 6.75%
Get Pre-QualifiedEstimated payments only. Actual rates and terms may vary.
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Navigation note: Navigation routes show the shortest mapped path to open water. A vessel taller than the binding bridge clearance may still reach open water via a longer alternate route that we don't currently map. Verify navigability with a local captain or surveyor before relying on it.