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6-Bedroom Residence in Key Biscayne

544 Warren Ln, Key Biscayne FL 33149, Key Biscayne, FL 33149

$8,000,000

Listing photo 1

Key Facts

Beds
6
Baths
6
Sq Ft
1,044
Lot
7,828 sq ft
Year Built
2026

About This Home

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.

Features & Amenities

  • Built 2026
  • First Floor Entry
  • Vaulted Ceiling(s)
  • Walk-In Closet(s)
  • Other
  • Built-In Grill
  • In Ground
  • Garden
  • Pool

Location

544 Warren Ln, Key Biscayne FL 33149, Key Biscayne, FL

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MLS # A12079811 · Listing courtesy of Duncan Studio Real Estate Division PLLC

Data last updated September 9, 2026

Listing information is provided in part by the IDX program of the MIAMI Association of REALTORS®. Information deemed reliable but not guaranteed. The information being provided is for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.