ActiveSingle Family Residence
544 Warren Ln, Key Biscayne FL 33149
Key Biscayne, FL 33149 · MLS #A12079811The residence
About this property
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.
At a glance
Property details
- Property type
- Single Family Residence
- Listing type
- For sale
- Status
- Active
- Bedrooms
- 6
- Bathrooms
- 5.5
- Living area
- 1,044 sq. ft.
- Year built
- 2026
- Lot size
- 7,828 sq. ft.
- Subdivision
- TROPICAL ISLE HOMES SUB
- County
- Miami-Dade County
- Days on market
- 24
- Original list price
- $8,000,000
- Listing date
- August 29, 2026
- Annual property tax
- $29,546 (2025)
- Listing agent
- James Duncan
- Listing office
- Duncan Studio Real Estate Division PLLC
- MLS number
- A12079811
Neighborhood & location
Explore TROPICAL ISLE HOMES SUB
Review nearby homes, local services, commute routes, schools, flood information, and community rules as part of your due diligence. Neighborhood information can change and should be verified with the appropriate local authority.
Schools
School information
- School district
- Miami-Dade County Public Schools
Plan your purchase
Mortgage calculator
- Principal & interest
- $40,452
- Property taxes
- $2,462
- Homeowners insurance
- $4,000
- Estimated total
- $46,915
Estimate only. Taxes, insurance, association fees, PMI, interest rate, and lender terms vary. Confirm the actual payment and closing costs with a licensed mortgage professional. Review Florida mortgage and pre-approval guidance.
Listing courtesy of Duncan Studio Real Estate Division PLLC, 305-979-2520.
Data provided by MIAMI Association of REALTORS®. Information is deemed reliable but is not guaranteed accurate by the MLS and should be independently verified. Property availability, price, and details are subject to change without notice.