544 Warren Lane
544 Warren Lane, Key Biscayne, FL 33149
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544 Warren Lane 544 Warren Lane, Key Biscayne, FL 33149 For Sale
$8,000,000
544 Warren Lane · Key Biscayne · Key Biscayne
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$8,000,000Asking Price
$7,663Per SqFt
6/5½Beds/BathsBd/Ba
1,044SqFt · 97.0 m²
MLS A12079811 · 19 days on Zilbert · Listed Aug 29, 2026 · 544 Warren Lane, Key Biscayne FL 33149Current layoutPhotos first

Property Details

Asking Price$8,000,000
Price per SqFt$7,663
Maintenance feeInquire
Property Taxes$29,546 2025
Interior Space1,044 SqFt
Beds/Baths6/5½
FurnishedYes
Year Built2026
Garage0 spaces
PoolYes
Lot Size0.18 acres
MLS #A12079811

Estimated Costs

An estimate of condo or HOA fees and property taxes

Monthly figures, as provided
Not providedmaintenance
$2,462taxes · $29,546/yr ÷ 12

Monthly carry is not computed when the association fee or the taxes are not provided.

From the listing

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.

Listed by Duncan Studio Real Estate Division PLLC

Sales History for This Home · 544 Warren Lane, Key Biscayne, FL 33149

Sale Sold Price Asking Price Beds/Baths SqFt Closed Date
Mark Zilbert
Mark Zilbert
Licensed Real Estate Broker · I track every sale in this neighborhood. Ask me about this home or the neighborhood.
+1 (786) 280-0201

Listed by Duncan Studio Real Estate Division PLLC. Mark Zilbert of ONE Sotheby's International Realty is a cooperating (transaction) broker and helps buyers find properties in Key Biscayne and throughout South Florida.

Location

Directions

The curated data and calculated data for this property and its surrounding condo units and homes is based solely on data we have extracted from the MLS. There may be unpublished, private, quit claim and other property offerings and transfers that do not appear here, which may affect how a buyer or seller perceives property values. Always conduct proper due diligence when considering buying or selling property.