Active single SALE

544 Warren Lane, Key Biscayne, Florida 33149

Key Biscayne, FL 33149

$8,000,000

6 beds

5.5 baths

1,044 sqft

Pool

1 / 59

Property Details

MLS# A12079811

Type Single

Square Footage 1,044

Bedrooms 6

Bathrooms 5 full, 1 half

Year Built 2026

Tax Amount $29,546

Property 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.

Amenities

2 Stories

Barbecue

Built 2026

Built-in Barbecue

Built-in Barbecue, Barbecue, Outdoor Living Area

Cooling: Central Air, Electric

Heating: Electric

In Ground

Main Level Primary

Main Level Primary, Vaulted Ceiling(s), Walk-In Closet(s)

Outdoor Living Area

Pool

Vaulted Ceiling(s)

View: Garden, Pool

Walk-In Closet(s)

Payment Calculator

$0.00 per month

30 Year Fixed, 6.59% Interest

Principal & Interest

$0.00

Property Tax

$0.00

Mortgage Insurance

$0.00

HOA

$0.00

Home Owners Insurance

$0.00

Home Price

Interest Rate

Down Payment

Property Location

Listing Office: Duncan Studio Real Estate Division PLLC

Listing Agent: James Duncan

All listings featuring the BMLS logo are provided by BeachesMLS Inc. This information is not verified for authenticity or accuracy and is not guaranteed. Copyright 2026 Beaches Multiple Listing Service, Inc. Updated: 09/10/2026 1:39 PM

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