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.
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.
Property Details
Price:
$8,000,000
MLS #:
A12079811
Status:
Active
Beds:
6
Baths:
5.5
Type:
Single Family
Subtype:
Single Family Residence
Subdivision:
TROPICAL ISLE HOMES SUB
Neighborhood:
tropicalislehomessub
Listed Date:
Aug 29, 2026
Finished Sq Ft:
1,044
Total Sq Ft:
2,229
Year Built:
2026
See this Listing
Schools
Elementary School:
Keybiscayne
Middle School:
Ponce De Leon
High School:
Mast Academy
Interior
Appliances
Gas Range, Ice Maker
Bathrooms
5 Full Bathrooms, 1 Half Bathroom
Cooling
Central Air, Electric
Flooring
Marble, Wood
Heating
Electric
Interior Features
First Floor Entry, Vaulted Ceiling(s), Walk-In Closet(s), Other
Exterior
Architectural Style
Detached, Two Story
Community Features
Additional Amenities
Construction Materials
Concrete Block Construction
Covered Spaces
2
Direction Faces
Southeast
Exterior Features
Built-In Grill
Lot Features
Less Than 1/4 Acre Lot
New Construction YN
1
Open Parking YN
1
Parking Features
Attached Carport, Driveway, On Street
Patio And Porch Features
Open Porch
Roof
Concrete
View
Garden, Pool
Window Features
Clear Impact Glass
Financial
Tax Year
2025
Taxes
$29,546
Map
Community
- Address544 Warren Ln Key Biscayne FL
- SubdivisionTROPICAL ISLE HOMES SUB
- CityKey Biscayne
- CountyMiami-Dade County
- Zip Code33149
Subdivisions in Key Biscayne
- 101 CONDOMINIUM
- 150 SUNRISE DRIVE CONDO
- 155 SUNRISE CONDO
- 544-548 FERNWOOD CONDO
- BAHAMA HOUSE CONDO,Bahama House
- BAHAMA HOUSE SOUTH CONDO
- BAHAMA HOUSE SOUTH CONDO,KEY CASSA
- BAHIA MAR CONDO OF KEY BI
- Beach Haus Key Biscayne,Beach Haus
- BISC KEY ESTATES
- BISCAYNE KEY ESTATES
- BLUE PELICAN CONDO
- CAPE FLA CLUB CONDO CLUST
- CAPE FLA SUB SEC 2
- CAPE FLORIDA CLIB CONDO P
- CAPE FLORIDA CLUB CONDO P
- CAPE FLORIDA SUB SEC 1
- CAPE FLORIDA SUB SEC 3
- CAPE FLORIDA SUB SEC 3,Village Estate
- CASA DEL MAR
- CASA DEL MAR CONDO
- CAY POLYNESIA CONDO
- CLUB TOWER ONE CONDO
- CLUB TOWER THREE CONDO
- CLUB TOWER THREE CONDO,CLUB TOWER THREE CON
- CLUB TOWER TWO CONDO
- commodore club
- COMMODORE CLUB SOUTH COND
- COMMODORE CLUB SOUTH COND,COMMODORE
- COMMODORE CLUB SOUTH COND,COMMODORE CLUB SOUTH
- Commodore Club South Condo
- COMMODORE CLUB WEST CONDO
- COMMODORE CLUB WEST CONDO,COMMODORE CLUB
- CRANDON TOWER CONDO
- G B RESORT CONDO HOTEL
- G B Resort Condo Hotel,Ritz Carlton
- G B VILLAS
- GALEN 250 CONDO
- GALEN DRIVE CONDO APTS
- GALEN DRIVE WEST CONDOMIN
- GRAND BAY RESIDENCES COND
- GRAND BAY RESIDENCES COND,GRAND BAY
- GRAND BAY TOWER CONDO
- GRAND BAY TOWER CONDO,GRAND BAY
- GRAND BAY TOWER CONDO,GRAND BAY TOWER COND
- GRAPETREE TOWNHOUSE CONDO
- HOLIDAY COLONY
- INDIES CONDO
- ISLAND BREAKERS CONDO
- ISLAND HOUSE
- ISLAND HOUSE APT INC – CO
- KEY BISC AMBASSADOR CONDO
- KEY BISC AMBASSADOR CONDO,Key Biscayne Ambassa
- Key Biscayne Ambassador Co
- KEY BISCAYNE COMMODORE CL
- KEY BISCAYNE COMMODORE CL,Commodore
- KEY BISCAYNE ONE HUNDRED
- KEY BISCAYNE VI CONDO
- KEY BISCAYNE VI CONDO,KEY BISCAYNE VI COND
- KEY BISCAYNE VI CONDO,KEY BISCAYNE VICONDO
- KEY BISCAYNES COMMODORE C
- Key Cassa
- KEY COLONY
- KEY COLONY CONDO #4,KEY COLONY CONDO 4
- Key Colony Condo 01,KEY COLONY NO 1
- Key Colony I
- KEY COLONY NO 1
- KEY COLONY NO 1,KEY COLONY
- Key Colony No 1,Key Colony-Tidemark
- KEY COLONY NO 1,Tidemark
- KEY COLONY NO 1,TIDEMARK KEY COLONY
- Key Colony No 2
- KEY COLONY NO 2 CONDO
- KEY COLONY NO 2 CONDO,KEY COLONY NO 2 COND
- KEY COLONY NO 2 CONDO,Oceansoun
- KEY COLONY NO 4 CONDO
- KEY COLONY NO 4 CONDO,Key Colony
- KEY COLONY NO 4 CONDO,Key Colony Botanica
- KEY COLONY NO 4 CONDO,KEY COLONY NO 4 COND
- KEY ISLANDER CONDO
- Key Islander Condo,Key Islander condo
- LAKE TOWER CONDO
- LAKE VILLA ONE CONDO
- LAKE VILLA ONE CONDO,The Ocean Club
- LAKE VILLA THREE CONDO
- LAKE VILLA TWO CONDO
- Le Phare Condo,Le phare
- LE PHARE KEY BISCAYNE CON
- LE PHARE KEY BISCAYNE CON,Le Phare
- LE PHARE KEY BISCAYNE CON,LE PHARE KEY BISCAYN
- MAR-AZUL CONDO
- MASHTA ISLAND
- MASHTA ISLAND A REPLAT OF
- MATHESON ESTATES
- MATHESON ESTATES,MATHESON STATES
- NORTH SUNRISE INC CONDO
- OCEAN LANE PLAZA CONDO
- Ocean Tower 2,Ocean Club
- OCEAN TOWER ONE CONDO
- OCEAN TOWER ONE CONDO
- OCEAN TOWER ONE CONDO,Ocean Club
- OCEAN TOWER ONE CONDO,OCEAN TOWER ONE COND
- OCEAN TOWER TWO CONDO
- OCEAN TOWER TWO CONDO,OCEAN TOWER TWO COND
- OCEAN VILLAGE CONDO
- OCEAN VILLAGE CONDO,OCEAN VILLAGE
- OCEAN VILLAGE CONDO,Ocean Village Condo
- Oceana Key Biscayne
- OCEANA KEY BISCAYNE CONDO
- OCEANA KEY BISCAYNE CONDO,OCEANA
- OCEANA KEY BISCAYNE CONDO,OCEANA KEY BISCAYNE
- Oceansound Phase II
- RESORT VILLA ONE CONDO
- RESORT VILLA ONE CONDO,Resort Villa One
- RESORT VILLA ONE CONDO,RESORT VILLA ONE CON
- RESORT VILLA TWO CONDO
- SANDS OF KEY BISCAYNE CON
- SANDS OF KEY BISCAYNE CON,SANDS OF KEY BISCAYN
- SANDS OF KEY BISCAYNE,SANDS OF KEY BISCAYN
- SMUGGLERS COVE
- SOLIMAR CONDO OF KEY BISC
- SOLIMAR CONDO OF KEY BISC,SOLIMAR CONDO
- SUNRISE CLUB CONDO
- SUNRISE CLUB CONDO,100 SUNRISE
- SUNRISE MANOR CONDO
- THE EMERALD BAY
- THE EMERALD BAY Key Colony
- THE EMERALDBAY
- THE EMERALDBAY @ KEY COLO
- THE EMERALDBAY @ KEY COLO,KEY COLONY
- THE EMERALDBAY @ KEY COLO,THE EMERALD BAY
- THE EMERALDBAY @ KEY COLON
- THE EMERALDBAY KEY COLONY
- The Ocean Club
- THE PALMS OF KEY BISCAYNE
- THE PYRAMIDS @ KEY BISCAY
- TIDEMARK KEY COLONY NO 1,Key Colony
- Tidemark,Key Colony
- TOWERS OF KEY BISCAYNE CO
- TOWERS OF KEY BISCAYNE CO,The Towers of Key Bi
- TOWERS OF KEY BISCAYNE CO,TOWERS OF KEY BISCAY
- TOWERS OF KEY BISCAYNE CON
- TROPICAL ISLE HOMES SUB
- TROPICAL ISLE HOMES SUB 1
- TROPICAL ISLE HOMES SUB 2N
- TROPICAL ISLE HOMES SUB 3
- TROPICAL ISLE HOMES SUB 3,TROPICAL ISLE HOMES
- TROPICAL ISLE HOMES SUB 4
- VILLAHARBOUR APTS CONDO
Market Summary
Current real estate data for Single Family in Key Biscayne as of Aug 30, 2026
42
Single Family Listed
167
Avg DOM
2,825
Avg $ / SqFt
$15,122,881
Avg List Price
Property Summary
- Located in the TROPICAL ISLE HOMES SUB subdivision, 544 Warren Ln Key Biscayne FL is a Single Family for sale in Key Biscayne, FL, 33149. It is listed for $8,000,000 and features 6 beds, 6 baths, and has approximately 1,044 square feet of living space, and was originally constructed in 2026. The current price per square foot is $7,663. The average price per square foot for Single Family listings in Key Biscayne is $2,825. The average listing price for Single Family in Key Biscayne is $15,122,881. To schedule a showing of MLS#a12079811 at 544 Warren Ln in Key Biscayne, FL, contact your CENTURY 21 Carioti agent at 2392986550.
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