$18,500,000
5 bd · 4 ba · 3,085 sqft
520 S Mashta Dr, Key Biscayne, FL 33149
MASHTA ISLAND A REPLAT OF
550 Harbor Dr, Key Biscayne, FL 33149
$19,450,0007 Beds8 Baths6,497 Sq. Ft.$2,994 / sq. ft.
Key Biscayne, FL 33149 · HURRICANE COVE
Status
Active
Type
Single Family Residence
Year Built
2003
Days on Market
11
Lot Size
23,000 sqft
MLS #
A12111835
County
Miami-Dade County
Listing Remarks — 550 Harbor Dr, Key Biscayne, FL 33149
Enjoy Paradise Found 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 dolphins and manatees swim in your backyard. As the sun hits the horizon, the afterset lights up the sky illuminating the clouds in a breathtaking array of tropical colors. Text listing agent. 24hr notice This offering is a double lot sale of 550&570 Harbor
Inside the Residence: 550 Harbor Dr, Key Biscayne, FL 33149
- Bathrooms Full
- 7
- Bathrooms Half
- 1
- Interior Features
- Elevator, Maid/In-Law Quarters
- Appliances
- Dishwasher, Disposal, Dryer, Microwave, Refrigerator, Washer
- Flooring
- Marble, Other
- Heating
- Central, Electric
- Cooling
- Central Air, Electric
- Architectural Style
- Attached, Mediterranean
- Garage Spaces
- 4
- Attached Garage
- Yes
- Parking Features
- Additional Spaces Available, Driveway, Golf Cart Parking, Paver Block
- Pool Features
- In Ground, Equipment Stays
- Pool Private
- No
- Year Built Details
- Resale
- Direction Faces
- East
Building & Association Facts — 550 Harbor Dr, Key Biscayne, FL 33149
- Building Name
- HURRICANE COVE
- Building Area Total
- 7356
- Building Area Units
- Square Feet
- Association
- No
Site, Views & Construction — 550 Harbor Dr, Key Biscayne, FL 33149
- Lot Features
- 1/2 To Less Than 3/4 Acre Lot
- Lot Size Square Feet
- 23,000
- Waterfront
- Yes
- Waterfront Features
- Ocean Access, Canal Width 121 Feet Or More, Lagoon, No Fixed Bridges
- Frontage Length
- 130
- View
- Lagoon
- Construction Materials
- Concrete Block Construction
- Roof
- Barrel Roof
- Exterior Features
- Open Balcony
- Sewer
- Public Sewer
- Water Source
- Municipal Water
- New Construction
- No
Tax & Parcel Record — 550 Harbor Dr, Key Biscayne, FL 33149
- Parcel Number
- 24-52-05-007-0020
- Tax Annual Amount
- $117,717
- Tax Year
- 2,025
- Tax Legal Description
- 5 & 6 55 42 .30 AC HURRICANE COVE PB 57-66 LOT 2 LOT SIZE 13302 SQ FT F/A/U 24-5205-013-0010 OR 19060-1529-1531 03/2000 1 COC 21909-0810 12
- Zoning
- 2000
- County Or Parish
- Miami-Dade County
Assigned Schools — 550 Harbor Dr, Key Biscayne, FL 33149
- Elementary School
- Keybiscayne
- Middle School
- Ponce De Leon
- High School
- Coral Gables
As reported by the listing agent; confirm with the school district before relying on it.
On the Map
550 Harbor Dr, Key Biscayne, FL 33149 · More homes in Key Biscayne
Courtesy of Three Bridges Realty, LLC
Comparable Listings in Key Biscayne
$18,500,000
4 bd · 4.5 ba · 2,255 sqft
631 N Mashta Drive, Key Biscayne, FL 33149
$16,500,000
6 bd · 7 ba · 7,103 sqft
131 Cape Florida Dr, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 3
$19,450,000
6 bd · 7 ba · 6,208 sqft
120 Knollwood Dr, Key Biscayne, FL 33149
CAPE FLA SUB SEC 2
$14,490,000
4 bd · 6 ba · 6,661 sqft
161 Cape Florida Drive, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 3
$16,800,000
4 bd · 4 ba · 3,620 sqft
640 S Mashta Dr, Key Biscayne, FL 33149
MASHTA ISLAND
$19,800,000
4 bd · 9 ba · 8,240 sqft
100 Cape Florida Dr, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 3
Quick Facts: 550 Harbor Dr, Key Biscayne, FL 33149
Listing summary: single family home for sale at 550 Harbor Dr, Key Biscayne, FL 33149. It came to market on October 23, 2026 through Three Bridges Realty, LLC. Public schools here fall under Miami-Dade County Public Schools. The listing names Keybiscayne, Ponce De Leon and Coral Gables as assigned schools. Layout: 7-bed, 8-bath, 6,497 sqft, in a structure dating to 2003.