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544 Warren, 
Key Biscayne, FL 33149

$8,000,000


6

Beds


6

Baths


1,044

Sq Ft


Single Family


Virtual Tour

Active

Listed by

James Duncan

Rocio Figueroa

Duncan Studio Real Estate Division Pllc

Last updated:

September 8, 2026, 03:30 PM

MLS#

A12079811

Source:

FL RAMC

About This Home

544 Warren

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.

Home Facts

Single Family

6 Baths

6 Bedrooms

Built in 2026

Subdivision & Development:

TROPICAL ISLE HOMES SUB

Price Summary

8,000,000

$7,662 per Sq. Ft.

MLS #:

A12079811

Last Updated:

September 8, 2026, 03:30 PM

Added:

10 day(s) ago


Rooms & Interior

Bedrooms

Total Bedrooms:

6

Bathrooms

Total Bathrooms:

6

Full Bathrooms:

5

Interior

Living Area:

1,044 Sq. Ft.


Structure

Structure

Building Area:

2,229 Sq. Ft.

Year Built:

2026


Finances & Disclosures

Finances

Price:

$8,000,000

Price per Sq. Ft:

$7,662 per Sq. Ft.

MLS Logo
The data relating to real estate for sale on this web site comes in part from a cooperative data exchange program of the Realtor Association of Martin County, Inc. MLS. Real estate listings held by brokerage firms other than Coldwell Banker Realty are marked with the IDX logo (Broker Reciprocity) or name and detailed information about such listings includes the name of the listing brokers. Data provided is deemed reliable but is not guaranteed.

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Contact an Agent

Yes, I would like more information. Please use and/or share my information with a Coldwell Banker ® affiliated agent to contact me about my real estate needs. By clicking Contact, I request to be contacted by phone or text message and consent to being contacted by automated means. I understand that my consent to receive calls or texts is not a condition of purchasing any property, goods, or services. Alternatively, I understand that I can access real estate services by email or I can contact the agent myself.

If a Coldwell Banker affiliated agent is not available in the area where I need assistance, I agree to be contacted by a real estate agent affiliated with another brand owned or licensed by Anywhere Real Estate (BHGRE®, CENTURY 21®, Corcoran®, ERA®, or Sotheby's International Realty®). I acknowledge that I have read and agree to the terms of use and privacy notice.