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544 Warren Ln, Key Biscayne FL 33149

House For Sale
$8,000,000

BTC: 102.36724248

ETH: 3,266.63944467

2 days
6 bds
5 ba
1,044 sqft

Overview

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.

Location

Details

Type:
Residential
Parking:
Attached Carport / Driveway / On Street
Year Built:
2026
Lot:
7828 Square Feet
Heating:
Electric
Price/sqft:
$7,663
Cooling:
Central Air / Electric
HOA:
No Data

Valuation

Recent sales nearby
30 public-records sales within 0.5 mi
Median actual sale: $2.5M
Not enough MLS comparables for a model estimate on this property. Public-records data shown instead.

Highlights

Annual tax
$29,546
2025
Pool
In Ground
View
Garden, Pool
Furnished
Furnished
All facts and features
  • Flooring

    • Marble

    • Wood

    Heating

    • Electric

    Cooling

    • Central Air

    • Electric

    Appliances

    • Gas Range

    • Ice Maker

    Other interior features

    • First Floor Entry

    • Vaulted Ceiling(s)

    • Walk-In Closet(s)

    • Other

    Bedrooms and bathrooms

    • Bedrooms: 6

    • Bathrooms: 1

    • Full bathrooms: 5

  • Parking

    • Attached Carport

    • Driveway

    • On Street

    Property

    • Exterior Features: Built-In Grill

    Lot

    • Lot: 7828 Square Feet

    Other Property Information

    • Parcel Number: 24-52-05-002-0160

    • Zoning: 0100

  • Type and style

    • Property Type: Residential

    • Property Sub Type: Single Family Residence

  • Other financial information

    • Annual tax amount: $29,546

  • Source details

    • MLS ID: A12079811

    Other facts

    • Construction Materials: Concrete Block Construction

    • Fireplace Features: Fireplace

    • Lot Features: Less Than 1/4 Acre Lot

    • Patio And Porch Features: Open Porch

    • Pool Features: In Ground

    • Window Features: Clear Impact Glass

    • Direction Faces: Southeast

    • Architectural Style: Detached / Two Story

    • Fireplace: Yes

    • Living Area: 1044

    • Water Source: Municipal Water

    • Subdivision Name: TROPICAL ISLE HOMES SUB

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The multiple listing information is provided by the Miami Association of REALTORS® from a copyrighted compilation of listings. The compilation of listings and each individual listing are ©2026-present Miami Association of REALTORS®. All Rights Reserved. The information provided is for consumers' personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Listing courtesy of: Duncan Studio Real Estate Division PLLC