544 Warren Ln Key Biscayne FL 33149 | MLS #A12079811

544 Warren Ln
Key Biscayne, FL, 33149
$8,000,000
6 Beds
5.5 Baths
1,044 SqFt
0 Acres
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MLS #A12079811 image #0
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.

Property Details

Price:
$8,000,000
MLS #:
A12079811
Status:
Active
Beds:
6
Baths:
5.5
Type:
Single Family
Subtype:
Single Family Residence
Subdivision:
TROPICAL ISLE HOMES SUB
Neighborhood:
tropicalislehomessub
Listed Date:
Aug 29, 2026
Finished Sq Ft:
1,044
Total Sq Ft:
2,229
Year Built:
2026
PoolNewconstructionTropical Isle Homes SubTropicalislehomessubTropical Isle Homes SubKeybiscaynePonce De LeonMast AcademyNo Restrictions

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Schools

Elementary School:
Keybiscayne
Middle School:
Ponce De Leon
High School:
Mast Academy

Interior

Appliances
Gas Range, Ice Maker
Bathrooms
5 Full Bathrooms, 1 Half Bathroom
Cooling
Central Air, Electric
Flooring
Marble, Wood
Heating
Electric
Interior Features
First Floor Entry, Vaulted Ceiling(s), Walk-In Closet(s), Other

Exterior

Architectural Style
Detached, Two Story
Community Features
Additional Amenities
Construction Materials
Concrete Block Construction
Covered Spaces
2
Direction Faces
Southeast
Exterior Features
Built-In Grill
Lot Features
Less Than 1/4 Acre Lot
New Construction YN
1
Open Parking YN
1
Parking Features
Attached Carport, Driveway, On Street
Patio And Porch Features
Open Porch
Roof
Concrete
View
Garden, Pool
Window Features
Clear Impact Glass

Financial

Tax Year
2025
Taxes
$29,546

Map

Community

Subdivisions in Key Biscayne

Market Summary

Current real estate data for Single Family in Key Biscayne as of Aug 30, 2026
42
Single Family Listed
167
Avg DOM
2,825
Avg $ / SqFt
$15,122,881
Avg List Price

Property Summary

    Located in the TROPICAL ISLE HOMES SUB subdivision, 544 Warren Ln Key Biscayne FL is a Single Family for sale in Key Biscayne, FL, 33149. It is listed for $8,000,000 and features 6 beds, 6 baths, and has approximately 1,044 square feet of living space, and was originally constructed in 2026. The current price per square foot is $7,663. The average price per square foot for Single Family listings in Key Biscayne is $2,825. The average listing price for Single Family in Key Biscayne is $15,122,881. To schedule a showing of MLS#a12079811 at 544 Warren Ln in Key Biscayne, FL, contact your CENTURY 21 Carioti agent at 2392986550.

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544 Warren Ln
Key Biscayne, FL