544 Warren Ln, Key Biscayne, FL 33149

For Sale $8,000,000

Days Listed

24

Beds

6

Baths

5

Interior

1044 ft2 (97m2)

For Sale
59
544 Warren Ln, Key Biscayne, FL 33149|6 BEDS | 5 BATHS |$8,000,000

Description

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.

| Floor Plans

  • Days On Market:
    24
    Listed:
    Aug 29, 2026
  • Size:
    1044 ft2 (97m2)
    Rooms:
    6
  • Bathrooms:
    5
    Baths Half:
    1
  • Terms:
    All Cash, Conventional, Owner Will Carry
    Property Facing:
    Southeast
  • Last Modification:
    1 month ago
     

Property Taxes and Assessment

  • Annual Tax
    $29,546
  • Tax Year
    2025
  • Maintenance Fee
    N/A
  • Association Fee
    N/A
  • Terms
    All Cash, Conventional, Owner Will Carry

Property Features

Facts and features
Views
  • Garden
    Pool
  • Interior Features
  • First Floor Entry
    Vaulted Ceiling(s)
    Walk-In Closet(s)
  • Exterior Features
  • Built-In Grill
  • Appliances
  • Gas Range
    Ice Maker
  • Parking
  • Attached Carport
    Driveway
    On Street
  • Other Facts
    Heating
  • Electric
  • Cooling
  • Central Air
    Electric
  • Flooring
  • Marble
    Wood
  • Window Features
  • Clear Impact Glass
  • Door Features
  • High Impact Doors
  • Fireplace Features
  • Fireplace
  • Roof
  • Concrete
  • Water Source
  • Municipal Water
  • Sewer
  • Public Sewer
  • Amenities
    Pool Features
  • In Ground
  • Patio And Porch Features
  • Open Porch
  • Community Features
  • Additional Amenities
  • Architectural Style
  • Detached
    Two Story
  • Construction Materials
  • Concrete Block Construction
  • Structure Type
  • Pool Only
    House
  • Schools
    Elementary School
  • Keybiscayne
  • Middle Or Junior School
  • Ponce De Leon
  • High School
  • Mast Academy
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    Sophia K. Albrecht

    Sophia K. Albrecht

    Lic. Real Estate Broker