Property photo 1
Property photo 2
Property photo 3
Property photo 4
Property photo 5
6 Beds
6 Baths
1,044 sqft

$8,000,000

544 Warren, Key Biscayne FL, 33149

Price per sqft$7,662.84
Built in2026
Property size1,044 sqft
Property typeResidential
Courtesy of James Duncan with Duncan Studio Real Estate Division PLLC

Overview

Active

Listed Aug 29, 2026

Updated Sep 22

New construction, this extraordinary custom Cape Dutch residence is a masterwork of timeless design, brought to life by Duncan and Heuser Design and Development, with interiors curated by James Duncan. Every detail, from the graceful gabled facade to the refined finishes within, reflects a rare devotion to craftsmanship and enduring elegance. Offering six generously proportioned bedrooms and six and a half beautifully appointed bathrooms, this home balances gracious scale with warm, livable comfort. Soaring ceilings, thoughtfully placed windows, and an effortless flow between rooms create a sense of light and openness throughout, while curated materials and bespoke millwork lend a distinctly luxurious character to every space. This is more than a house; it is a legacy residence, designed to be lived in beautifully for generations. A truly rare offering for the discerning buyer seeking timeless architecture, exceptional interiors, and uncompromising quality throughout.

$53,224/mo

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

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

Additional information

MLS® ID
A12079811

Interior Features

Bedrooms
6
Bathrooms
6
Fireplace
Yes
Cooling
Yes
Heating
Yes
Basement
No

Exterior Features

Lot Size
0.18 Acres

Other Property Details

Taxes
$29,546
Tax Frequency
Annually
View
Yes
New Construction
Yes
Furnished
Yes
Pool
Yes
55+/Senior Community
Yes
MLS provider logo

Courtesy of Duncan Studio Real Estate Division PLLC, James Duncan,
Listing Contact: 305-979-2520 

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 1:55 PM UTC, 9/22/2026

Powered by Luxury Presence