MASHTA ISLAND
669 S Mashta Dr, Key Biscayne FL 33149
3 beds · 3.5 baths · 3,382 ft²
$4,950,000
Est. Payment $26,346/mo
3
Bedrooms
3.5
Bathrooms
3,382
Sq. Ft.
1960
Year Built
38
Days on Market
Description
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.
Facts
- MLS#
- A11922444
- Subdivision
- MASHTA ISLAND
- Property Type
- Residential
- Property Sub Type
- Single Family Residence
- Year Built
- 1960
- Lot Size
- 10,000 ft²
- Sq. Ft.
- 3,382 ft²
- Sq. Mt.
- 314 m²
- Price per sq. ft.
- $1,464/ft²
- Price per sq. mt.
- $15,764/m²
- Stories
- —
- Garage
- —
- Pool
- —
- Days on Market
- 38 days
- Listed
- Nov 30, 2025
- Last Updated
- Feb 14, 2026
- Price/Lot Sq.Ft.
- $495/ft²
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Same ZIP, similar price + bedrooms.
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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
May 2026
34
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).
| 2/14/2026 | Sold | $4,950,000 |
| 11/30/2025 | Listed for sale | $4,950,000 |
History reflects fields present on the live MLS record. Full multi-year history requires the MIAMI ListingHistory resource (not yet enabled).
Location
GreatSchools Summary Ratings
Public + private K-12 schools within 5 miles of this listing.
Falcon Cove Middle School6,7,8 · public · 0.7 mi
Cypress Bay High School9,10,11,12 · public · 0.8 mi
Manatee Bay Elementary SchoolKG,1,2,3,4,5 · public · 1.3 mi
Everglades Elementary SchoolPK,KG,1,2,3,4,5 · public · 1.5 mi
First Steps International AcademyPK,KG · private · 1.6 mi
Little Flowers of Hope Center for Children8,9,10,11,12 · private · 1.7 mi
Hawkes Bluff Elementary SchoolPK,KG,1,2,3,4,5 · public · 2.0 mi
Sw Ranches Christian AcademyPK,KG · private · 2.1 mi
Greentree Preparatory Charter SchoolKG,1,2,3,4,5,6,7,8 · charter · 2.1 mi
Apple Tree Montessori SchoolPK,KG,1,2,3 · private · 2.1 mi
Estimated Monthly Payment
$30,621/mo
Principal & Interest
$26,346
Property Tax
$4,125
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 within 24 hours
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