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MASHTA ISLAND · Key Biscayne, FL 33149 → · MLS A11922444
Listed by One Sotheby's International Realty
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.
The propertyAs the MLS records it
ASK JULIAN
669 S Mashta Dr, Key Biscayne, FL 33149 is no longer on the market. Write here, call or send a WhatsApp: Julian Acosta, real estate advisor with Compass, answers within one business day.
No lists, no obligation.
| Year | Median price per SF | Closed sales |
|---|---|---|
| 2020 | $803 | 54 |
| 2021 | $964 | 109 |
| 2022 | $1,220 | 60 |
| 2023 | $1,249 | 30 |
| 2024 | $1,321 |
Homes of the same kind on the market nearby, the nearest in price first.
LIVE · MLS · AS OF NOV 1, 2026
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1 / 37The information on this page is supplied by the Southeast Florida Multiple Listing Service of the MIAMI Association of REALTORS®. It is deemed reliable but is not guaranteed accurate by the MLS, and it may have changed since the date above. It is provided for your personal, non-commercial use and may not be used for any purpose other than to identify properties you may be interested in purchasing. This listing is held by One Sotheby's International Realty. Julian Acosta is a real estate advisor with Compass.
A listing shown here may be held by a brokerage other than Compass. To report an error in this listing's information, write to julian.acosta@compass.com.
SOLD · AUG 11, 2026
SOLD · APR 20, 2026
SOLD · JAN 16, 2026
SOLD · MAR 27, 2026
SOLD · OCT 26, 2026
SOLD · SEP 24, 2026| 48 |
| 2025 | $1,404 | 38 |
|---|
| 2026 to date | $1,498 | 37 |
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These figures are the market's closed sales as the MLS records them: this building's for a unit, a gated community's for a home inside one, and otherwise the sales of this kind of property in the home's market — for a home at $2,000,000 or more, only that market's sales from that price up. Which of these it is, is said above the figures. No snapshot is drawn from fewer than 5 sales of the last twelve months, and a median price per SF is stated only from 3 sales that state a living area. They are not sales by Julian Acosta, they are not an appraisal, and they say nothing of this home's price.
These are the public schools whose attendance zone holds this listing's location, as Miami-Dade County publishes the zones. A zone is not a guarantee of enrollment, the district can change it, and a listing's point on the map can sit a few meters from its lot: confirm the school with Miami-Dade County Public Schools before you rely on it. Distances are straight lines. The page states no rating of any school.
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