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6 Beds
6 Baths
1,044 sqft

$8,000,000

544 Warren Lane, Key Biscayne FL, 33149

Price per sqft$7,662.84
Built in2026
Property size1,044 sqft
Property typeResidential

Overview

Active

Listed Aug 29, 2026

Updated 10 days ago

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

Listed with Duncan Studio Real Estate Division PLLC

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Data last updated 4:10 AM UTC, 9/11/2026

 

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