TROPICAL ISLE HOMES SUB
544 Warren Ln, Key Biscayne FL 33149
6 beds · 5.5 baths · 1,044 ft²
$8,000,000
Est. Payment $42,579/mo
6
Bedrooms
5.5
Bathrooms
1,044
Sq. Ft.
2026
Year Built
0
Days on Market
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.
Facts
- MLS#
- A12079811
- Subdivision
- TROPICAL ISLE HOMES SUB
- Property Type
- Residential
- Property Sub Type
- Single Family Residence
- Year Built
- 2026
- Lot Size
- 7,828 ft²
- Sq. Ft.
- 1,044 ft²
- Sq. Mt.
- 97 m²
- Price per sq. ft.
- $7,663/ft²
- Price per sq. mt.
- $82,474/m²
- Stories
- —
- Garage
- —
- Pool
- —
- Days on Market
- —
- Listed
- Aug 29, 2026
- Last Updated
- Aug 29, 2026
- Price/Lot Sq.Ft.
- $1,022/ft²
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Market insights for Key Biscayne
Live MLS-derived activity. Forecast is a conservative rule-of-thumb estimate — not a guarantee.
Sellers market
August 2026
49
Median days to sold
+4.5%
1-year price forecast (est.)
Price & tax history
From the live MIAMI MLS feed. Older history requires the ListingHistory resource (not yet enabled).
| 8/29/2026 | Listed for sale | $8,000,000 |
History reflects fields present on the live MLS record. Full multi-year history requires the MIAMI ListingHistory resource (not yet enabled).
Location
Estimated Monthly Payment
$49,396/mo
Principal & Interest
$42,579
Property Tax
$6,667
Insurance
$150
HOA
$0
Estimates only. Actual payment depends on credit, lender, insurance carrier, and FL/Miami-Dade specifics. Contact Rangely for a precise quote.
The data relating to real estate for sale on this website comes in part from the Southeast Florida Multiple Listing Service. MLS Data is deemed reliable, but is not guaranteed accurate by MIAMI REALTORS®.
Accuracy of listing information is not guaranteed. Listing information is provided for personal consumer, non-commercial use, solely to identify potential properties for potential purchase. All other use is strictly prohibited and may be a violation of federal and state law.
Copyright Southeast Florida MLS a/k/a SEFMLS © 2026.
Updated 23 hours ago
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