A once-in-a-generation opportunity on Key Biscayne’s only private waterfront road, this extraordinary estate spans 28,800 square feet with 120 feet of pristine water frontage, a secluded sandy beach, and a private dock framing panoramic views of the Miami skyline. Offering 10,926 square feet of living space, the property delivers exceptional privacy alongside a striking contemporary design recognized as part of the esteemed Rosa de la Cruz Collection. Soaring 20-foot ceilings, sculptural architectural lines, and expansive, light-filled interiors create a dramatic backdrop for art, entertaining, or a visionary reimagining tailored to your lifestyle. A truly rare canvas in an irreplaceable location, with architectural plans available to transform it into the most exceptional residence in Key Biscayne.
Property Details
Price:
$26,000,000
MLS #:
A11921513
Status:
Active Under Contract
Beds:
3
Baths:
5
Type:
Single Family
Subtype:
Single Family Residence
Subdivision:
MATHESON ESTATES
Neighborhood:
mathesonestates
Listed Date:
Nov 26, 2025
Finished Sq Ft:
10,926
Total Sq Ft:
10,926
Year Built:
1954
See this Listing
Schools
Elementary School:
Keybiscayne
Middle School:
Ponce De Leon
High School:
Coral Gables
Interior
Appliances
Dishwasher, Disposal, Dryer, Electric Water Heater, Electric Range, Refrigerator, Washer
Bathrooms
4 Full Bathrooms, 2 Half Bathrooms
Cooling
Central Air, Electric
Flooring
Ceramic Floor, Marble
Heating
Central, Electric
Interior Features
First Floor Entry, Built-in Features, Entrance Foyer, Vaulted Ceiling(s), Volume Ceilings, Den/Library/Office, Maid/In-Law Quarters
Exterior
Architectural Style
Attached, Two Story
Community Features
None
Construction Materials
CBS Construction
Covered Spaces
1
Direction Faces
Southwest
Exterior Features
Open Balcony, Room For Pool
Lot Features
1/2 To Less Than 3/4 Acre Lot
Open Parking YN
1
Parking Features
Circular Driveway, Driveway, Paver Block, No Rv/Boats, No Trucks/Trailers
Patio And Porch Features
Open Balcony
Roof
Barrel Roof, Flat Roof With Facade Front
Security Features
Smoke Detector
View
Bay, Garden
Waterfront Features
WF/Ocean Access, No Fixed Bridges, Ocean Front
Window Features
Partial Impact Glass, Partial Panel Shutters/Awnings, Partial RollDown Shutters, Electric Shutters, Hurricane Shutters, Bay Window(s), High Impact Windows
Financial
Tax Year
2024
Taxes
$59,191
Map
Community
- Address5 Harbor Pt Key Biscayne FL
- SubdivisionMATHESON ESTATES
- CityKey Biscayne
- CountyMiami-Dade County
- Zip Code33149
Market Summary
Current real estate data for Single Family in Key Biscayne as of Apr 21, 2026
59
Single Family Listed
173
Avg DOM
2,138
Avg $ / SqFt
$8,928,508
Avg List Price
Property Summary
- Located in the MATHESON ESTATES subdivision, 5 Harbor Pt Key Biscayne FL is a Single Family for sale in Key Biscayne, FL, 33149. It is listed for $26,000,000 and features 3 beds, 5 baths, and has approximately 10,926 square feet of living space, and was originally constructed in 1954. The current price per square foot is $2,380. The average price per square foot for Single Family listings in Key Biscayne is $2,138. The average listing price for Single Family in Key Biscayne is $8,928,508.
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