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6 Beds
7 Baths
4,190 sqft

$8,500,000

238 Buttonwood, Key Biscayne FL, 33149

Price per sqft$2,028.64
Built in2026
Property size4,190 sqft
Property typeResidential
Courtesy of Fernanda Moreno with Douglas Elliman

Overview

Active

Listed May 21, 2026

Updated Sep 22

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!

$56,551/mo

Est. mortgage payment based on a $8,500,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
A12021891

Interior Features

Bedrooms
6
Bathrooms
7
Cooling
Yes
Heating
Yes
Basement
No

Exterior Features

Lot Size
0.2 Acres

Other Property Details

Taxes
$12,000
Tax Frequency
Annually
View
Yes
Pets Allowed
Yes
New Construction
Yes
Pool
Yes
55+/Senior Community
No

Also listed on RMLS & RAGFL

MLS provider logo

Courtesy of Douglas Elliman, Fernanda Moreno,
Listing Contact: 786-300-6334 

Based on information from Martin County REALTORS of the Treasure Coast, Inc. (RAMC) as of 9/22/2026. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent.

©2026 Martin County REALTORS of the Treasure Coast, Inc. All rights reserved.

Data last updated 7:58 AM UTC, 9/22/2026

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