544 Warren Ln, Key Biscayne, FL 33149

Key Biscayne
Local realty services provided by:Better Homes and Gardens Real Estate Florida 1st
544 Warren Ln,Key Biscayne, FL 33149
$8,000,000
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  • 6 Beds
  • 6 Baths
  • 1,044 sq. ft.
  • Single family
  • Active
Listed by: james duncan, rocio figueroa
Office: duncan studio real estate division pllc305-979-2520
MLS#:A12079811
Source:SEFMLS

Price summary

  • Price:$8,000,000
  • Price per sq. ft.:$3,589.05

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.

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Home facts

  • Year built:2026
  • Subdivision & Development:TROPICAL ISLE HOMES SUB
  • Listing ID #:A12079811
  • Updated:November 12, 2026 at 11:07 AM

Rooms and interior

  • Bedrooms:6
  • Total bathrooms:6
  • Full bathrooms:5
  • Half bathrooms:1
  • Flooring:Hardwood, Marble, Wood
  • Kitchen Description:Gas Range, Ice Maker
  • Bedroom Description:Walk-In Closets
  • Living area:1,044 sq. ft.

Heating and cooling

  • Cooling:Central Air, Electric
  • Heating:Electric
  • Central air:Yes

Structure and exterior

  • Roof:Concrete
  • Year built:2026
  • Building area:1,044 sq. ft.
  • Lot area:0.18 Acres
  • Lot Features:Flood Zone, Sprinklers Automatic
  • Architectural Style:Detached, Two Story
  • Construction Materials:Block
  • Exterior Features:Open, Outdoor Grill, Porch, Security High Impact Doors
  • Levels:2 Story

Schools

  • High school:Mast Academy
  • Middle school:Ponce De Leon
  • Elementary school:Keybiscayne

Utilities

  • Water:Public
  • Sewer:Public Sewer

Finances and disclosures

  • Price:$8,000,000
  • Price per sq. ft.:$3,589.05
  • Tax amount:$29,546 (2025)

Features and amenities

  • Appliances:Gas Range, Ice Maker
  • Amenities:Fireplace, Impact Glass Windows, Vaulted Ceilings
  • Pool features:In Ground, Pool

Parking

  • Parking description:2 Carport Space(s), Attached Carport, Driveway, On Street
  • Carport spaces:2
Information deemed reliable but not guaranteed. Information is provided, in part, by Greater Miami MLS. This information being provided is for consumer's personal, non-commercial use and may not be used for any other purpose other than to identify prospective properties consumers may be interested in purchasing.

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