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
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
Exterior
Architectural Style
Attached, Two Story
Community Features
None
Construction Materials
CBS Construction
Exterior Features
Open Balcony, Room For Pool
Parking Features
Circular Driveway, Driveway, Paver Block, No Rv/Boats, No Trucks/Trailers
Roof
Barrel Roof, Flat Roof With Facade Front
Security Features
Smoke Detector
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 Mar 07, 2026
53
Single Family Listed
211
Avg DOM
2,169
Avg $ / SqFt
$9,400,094
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 $2,169. The average listing price for Single Family in Key Biscayne is $9,400,094.
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