Homes for sale in Key Biscayne
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Single Family Residence
544 Warren Ln
Key Biscayne, FL 33149
$8,000,000
- Beds
- 6
- Baths
- 5 + 1 half
- Sq ft
- 1,044
- Year built
- 2026
- Price per sq ft
- $7,663
Listing courtesy of James Duncan, Duncan Studio Real Estate Division PLLC
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.
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.
Details
Property
- Type
- Single Family Residence
- Style
- Detached, Two Story
- Building
- Pool Only
- Year built
- 2026
- Lot size
- 7,828 sq ft
- Building name
- TROPICAL ISLE HOMES SUB
- Subdivision
- TROPICAL ISLE HOMES SUB
- County
- Miami-Dade County
- Faces
- Southeast
- View
- Garden, Pool
- Flood zone
- AE
Interior
- Appliances
- Gas Range, Ice Maker
- Flooring
- Marble, Wood
- Cooling
- Central Air, Electric
- Heating
- Electric
- Features
- First Floor Entry, Vaulted Ceiling(s), Walk-In Closet(s)
- Furnished
- Furnished
Exterior and parking
- Exterior
- Built-In Grill
- Patio and porch
- Open Porch
- Pool
- In Ground
- Parking
- Attached Carport, Driveway, On Street
- Construction
- Concrete Block Construction
- Roof
- Concrete
Community and fees
- Annual taxes
- $29,546
- Terms
- All Cash, Conventional, Owner Will Carry
Neighborhood
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The data relating to real estate for sale or lease on this website comes in part from the Internet Data Exchange (IDX) program of MIAMI REALTORS® MLS. Listings are provided by participating brokers.
Information is deemed reliable but is not guaranteed and should be independently verified. It is subject to change and is provided for consumers’ personal, non-commercial use only, to identify properties they may be interested in. Listing last updated September 22, 2026.