544 Warren Ln Key Biscayne, FL $ 8,000,000
544 Warren Ln
$ 8,000,000
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544 Warren Ln

Key Biscayne, FL, 33149
$ 8,000,000
Bedrooms6 Baths5.1 Sq 1,044

Monthly Estimate*

$ 50,513

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Single Family Home for sale in Key Biscayne, FL

for $8,000,000 with 6 bedrooms and 5 full baths, 1 half bath. This 1,044 square foot home was built in 2026.

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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Single Family Active

Price

$ 8,000,000

Bedrooms

6

Full Bath

5

Half Bath

1

Property Type

Single Family

Taxes

$ 29,546

Style

Year Built

2026

Town/City

Key Biscayne

County/Region

Miami-Dade

MLS | Web ID

A12079811

Features
General
Sewer Public Sewer
Heating Electric
Cooling Central Air Electric
Utilities Cable Available
Possession Close Of Escrow
Roof Concrete
Appliances Gas Range Ice Maker
Garage Spaces 0
Patio/Porch Features Open Porch
Architectural Style Detached Two Story
Pool Features In Ground Pool
Restrictions No Restrictions
Construction Materials Block
Year Built 2026
View Garden Pool
Stories Count 2
Levels Two
Property Subtype Single Family Residence
Tax Year 2025
Community Features Other
County Miami-Dade
Property Type Residential
Subdivision Name TROPICAL ISLE HOMES SUB
Facing Direction Southeast
Garage Y/N false
Total Rooms 0
Full Baths 5
Status Active
High School Mast Academy
City Key Biscayne
Disclosures Flood Plain Disclosure
Senior Community Y/N false
Zoning Description 0100
MLS Area 42
Lot Size Units Square Feet
Lot Size Square Feet 7828
Carport Spaces 2
Carport Y/N true
Listing Terms Cash Conventional Owner May Carry
Elementary School Keybiscayne
Year Built Details New Construction
Tax Annual Amount 29546
Middle/Junior High School Ponce De Leon
Lease Considered Y/N false
Virtual Tour https://www.propertypanorama.com/instaview/mia/A12079811
Standard Status Active
Occupancy Type Call Agent
Property Sub Type Additional Single Family Residence
Legal Description 5 55 42 TROPICAL ISLE HOMES SUB PB 50-64 LOT 1 BLK 3 LOT SIZE 77.500 X 101 73R-81592
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Interior
Interior Amenities Bedroom on Main Level First Floor Entry Fireplace Vaulted Ceiling(s) Walk-In Closet(s)
Flooring Hardwood Marble Wood
Furnished Y/N Furnished
Air Conditioning Y/N true
Heating Y/N true
Window Features Impact Glass
Fireplace Y/N true
Half Baths 1
Total Bedrooms 6
Total Baths 6
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Exterior
Exterior Amenities Security/High Impact Doors Outdoor Grill Porch
Parking Features Attached Carport Driveway On Street
Lot Features Sprinklers Automatic < 1/4 Acre
Water Source Public
Lot Size Area 7828
Spa true
Building Area Total 2229
Private Pool true
Waterfront Y/N false
Covered Spaces 2
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* Excluded Features
List By
Duncan Studio Real Estate Division Pllc

Broker

james@james-duncan.com

Email

Affordability Calculator

$52,975
Per Month
95%
5%
0%
Monthly Principal & Interest
$50,513
Monthly Property Taxes
$2,462
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
4808084 Elementary School
4808082 Middle School
Mast Academy High School High School
Pricing History
Date Price Price Change Description
8/29/2026 $8,000,000 Listed Price

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544 Warren Ln, Key Biscayne, FL, 33149 is a Single Family Home for sale at $8,000,000 with 1,044 sqft. 544 Warren Ln has 6 bedrooms, 5.1 baths, and was built in 2026. The property's zip code is 33149 which is in Key Biscayne, FL