669 S Mashta Drive
669 S Mashta Drive, Key Biscayne, FL 33149
Sold by ONE Sotheby's International Realty
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669 S Mashta Drive 669 S Mashta Drive, Key Biscayne, FL 33149 Sold
$4,750,000
669 S Mashta Drive · Key Biscayne · Key Biscayne
669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 1 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 2 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 3 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 4 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 5 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 6 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 7 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 8 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 9 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 10 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 11 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 12 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 13 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 14 of 15669 S Mashta Drive, 669 S Mashta Drive, Key Biscayne FL 33149, photo 15 of 15
$4,750,000Sold Price
$1,404Per SqFt
3/3½Beds/BathsBd/Ba
3,382SqFt · 314.2 m²
MLS A11922444 · 290 days on Zilbert · Listed Dec 1, 2025 · 669 S Mashta Drive, Key Biscayne FL 33149Current layoutPhotos first
This property is also available to rent. See the rental listing

Property Details

Sold Price$4,750,000
Last Asking Price$4,950,000
Price per SqFt$1,404
Maintenance fee$0 Monthly
Property Taxes$22,036 2025
Interior Space3,382 SqFt
Beds/Baths3/3½
Year Built1960
Garage0 spaces
PoolYes
Lot Size0.23 acres
Closed Date2/4/2026
MLS #A11922444

Estimated Costs

An estimate of condo or HOA fees and property taxes

Monthly carry, before financing
$0maintenance · $0 per month
$1,836taxes · $22,036/yr ÷ 12
$1,836 / monthassociation + taxes, before mortgage and insurance

Fees and taxes based on MLS provided figures, and may not be accurate

From the listing

A beautifully reimagined home on one of Key Biscayne’s most desirable streets, South Mashta Drive. With its bold charcoal façade and distinctive presence, this residence stands out immediately while maintaining a warm island charm that makes it feel welcoming from the moment you arrive. Surrounded by mature trees and lush greenery, the setting offers both atmosphere and privacy.Inside, vaulted ceilings and expansive windows fill the space with natural light, creating a soft and inviting ambiance. The great room features a stone fireplace, wide-plank wood floors, and a natural flow to the terrace and pool, bringing effortless connection between indoor comfort and outdoor enjoyment. Every space reflects a carefully curated, cozy feel that enhances the character of the home.The renovated master bathroom offers calming finishes and a serene atmosphere. A private suite provides the perfect accommodation for guests or extended family. Set on a generous 10,000 sq ft lot and enhanced with impact windows, updated lighting, a newer roof, and thoughtful design details, this residence blends timeless appeal, warmth, and the unique island charm that defines Key Biscayne living.A rare opportunity to own a home that feels both distinctive and deeply inviting, in one of the most coveted locations on the island.

Listed by One Sotheby's International Realty

Sales History for This Home · 669 S Mashta Drive, 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 One Sotheby's International Realty. 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.

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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.