544 Warren Lane, Key Biscayne, FL 33149 (MLS# A12079811)

544 Warren Lane, Key Biscayne, FL 33149

New Listing
$8,000,000
Property Type: Residential Bedrooms: 6 Baths: 6 Square Footage: 2,229 Status: Active
Current Price: $8,000,000 List Date: 8/29/2026 Last Modified: 9/02/2026

Overview

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.

Listing Details MLS# A12079811

General Property Information

Property Sub Type
Single Family Residence
Bedrooms Total
6
Bathrooms Total
6
Bathrooms Full
5
Bathrooms Half
Yes
Building Area Main
2229
Living Area Main
1044
Adjusted Area Main
1649
Year Built
2026
Carport YN
Yes
Attached Carport YN
Yes
Carport Spaces
2
Covered Spaces
2
Lot Size Area
7828
Lot Size Acres
0.18
Senior Community YN
Yes
Outdoor Living Spaces YN
Yes
Stories Total
2
Direction Faces
Southeast
Fireplace YN
Yes
Pool Private YN
Yes
Spa YN
Yes
Furnished
Furnished

Property Features

Exterior Features: Built-in Barbecue Flooring: Marble; Wood Parking Features: Driveway; On Street; Attached Carport; Carport Property Condition: New Construction Appliances: Gas Range; Ice Maker Construction Materials: Block Cooling: Central Air; Electric Heating: Electric Interior Features: Vaulted Ceiling(s); Walk-In Closet(s) Levels: Two Listing Terms: Cash; Conventional; Owner Will Carry Pool Features: In Ground Possession: Close Of Escrow Restrictions: No Restrictions Roof: Concrete Sewer: Public Sewer Special Information: Flood Zone Sprinkler Description: Auto Sprinkler Tax Information: New Construction Utilities: Cable Available View: Garden; Pool Water Source: Public Showing Requirements: 24 Hour Notice Outdoor Living Spaces: Porch Porch Details: Porch - Open Room Types: Other

Contract Information

Comp Sale YN
No
Original List Price
8000000
Occupant Type
Call Listing Agent

Location and Legal

Country
United States
County Or Parish
Miami-Dade
County Parish Name
Miami-Dade
Street Number
544
Street Name
Warren
Street Suffix
Lane
City Name
Key Biscayne
Municipal Code
24
State Or Province
FL
Postal Code
33149
Postal Code +4
1827
Postal Zip
33149
Subdivision Name
TROPICAL ISLE HOMES SUB
Area
2520
Elementary School
Key Biscayne K-8
Middle Or Junior School
Ponce De Leon
High School
Coral Gables
Parcel Number
2452050020160
Subdivision Number
2
Zoning
0100
Flood Zone
AE

Financial Information

Membership Fee Required YN
No
Tax Annual Amount
29546
Tax Year
2025
Tax Legal Description
5 55 42 TROPICAL ISLE HOMES SUB PB 50-64 LOT 1 BLK 3 LOT SIZE 77.500 X 101 73R-81592

Status Change Information

Major Change Timestamp
2026-08-29T04:00:00Z
Major Change Type
New Listing
Status Change Date
2026-08-29

More Information

Entry Information

Entry Level
Yes

Short Sale Details

Short Sale Addendum
No

Pool Size Details

Pool Size (WxL)
30x15

Storm Protection

Impact Glass
Partial

Price Calculations

Current Price To SqFt
7662.83

Section Details

Parcel Number MLX
0160

Originating Details

Originating System Key
560465914
Originating System ID
M00000151

Room Information

Room Name
Other
IDX
Listing Office: Duncan Studio Real Estate Division PLLC
Last Updated: September - 02 - 2026
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