A unique architectural masterpiece in the heart of Key Biscayne, this brand-new contemporary residence by Praxis Architecture blends modern tropical luxury with exceptional craftsmanship and bespoke European finishes. Set on an oversized 9,000 SF lot, the residence offers 6 bedrooms, 6 full bathrooms, 1 half bath, and over 4,190 SF of curated living space designed around natural light, privacy, and seamless indoor-outdoor living.Imported Spanish porcelain and ceramic surfaces, Italian-engineered wood flooring, Portuguese interior doors, and refined finishes sourced from the United Kingdom create a warm and sophisticated architectural atmosphere throughout. Custom millwork — including the kitchen, bar, wardrobes, and integrated TV units — was exclusively crafted by a French maison specializing in ultra-luxury bespoke cabinetry.The residence highly designed kitchen is equipped with Wolf, Sub-Zero, and Miele appliances, smart-home automation, and integrated security. Outdoor spaces feature a spectacular 36-foot swimming pool, expansive terraces, summer kitchen, lush private garden patio, and multiple entertaining areas designed for effortless resort-style living.Located moments from tennis courts and the Key Biscayne Yacht Club, beaches, marinas, top-rated schools, and the best of island living, this residence represents one of Key Biscayne’s most thoughtfully designed brand new-construction homes – Expected to be finished in July 2026. Easy to Show!
Listing Provided Courtesy of Douglas Elliman at 305-677-5000
Property Details
Price:
$8,500,000
MLS #:
A12021891
Status:
Active
Beds:
6
Baths:
6.5
Type:
Single Family
Subtype:
Single Family Residence
Subdivision:
TROPICAL ISLE HOMES SUB 4
Neighborhood:
2420
Listed Date:
May 21, 2026
Finished Sq Ft:
4,190
Total Sq Ft:
5,648
Lot Size:
388,380,960 sqft / 0.20 acres (approx)
Year Built:
2026
See this Listing
Schools
Elementary School:
Key Biscayne K-8
Middle School:
Ponce De Leon
High School:
Coral Gables
Interior
Appliances
Dishwasher, Dryer, Electric Range, Microwave, Refrigerator, Trash Compactor, Washer
Bathrooms
6 Full Bathrooms, 1 Half Bathroom
Cooling
Central Air
Flooring
Wood
Heating
Central
Interior Features
Built-in Features, Closet Cabinetry, Entrance Foyer, Pantry, Walk-In Closet(s)
Levels
Two
Exterior
Association Amenities
Beach Club Available
Construction Materials
Block
Covered Spaces
2
Direction Faces
East
Exterior Features
Balcony, Built-in Barbecue
Fencing
Fenced
Garage Spaces
2
Lot Features
Fruit Tree(s)
New Construction YN
1
Parking Features
Covered
Patio And Porch Features
Patio
Roof
Concrete
View
Garden
Financial
Tax Year
2025
Taxes
$12,000
Map
Community
- Address238 Buttonwood Drive Key Biscayne FL
- SubdivisionTROPICAL ISLE HOMES SUB 4
- CityKey Biscayne
- CountyMiami-Dade
- Zip Code33149
Market Summary
Current real estate data for Single Family in Key Biscayne as of Nov 05, 2026
41
Single Family Listed
151
Avg DOM
2,613
Avg $ / SqFt
$14,294,537
Avg List Price
Property Summary
- Located in the TROPICAL ISLE HOMES SUB 4 subdivision, 238 Buttonwood Drive Key Biscayne FL is a Single Family for sale in Key Biscayne, FL, 33149. It is listed for $8,500,000 and features 6 beds, 7 baths, and has approximately 4,190 square feet of living space, and was originally constructed in 2026. The current price per square foot is $2,029. The average price per square foot for Single Family listings in Key Biscayne is $2,613. The average listing price for Single Family in Key Biscayne is $14,294,537.
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