MASHTA ISLAND A REPLAT OF
551 S Mashta Dr, Key Biscayne FL 33149
6 beds · 5 baths · 3,245 ft²
$5,495,000
Est. Payment $29,247/mo
6
Bedrooms
5
Bathrooms
3,245
Sq. Ft.
1961
Year Built
2
Garage
55
Days on Market
Description
Your tropical private retreat on exclusive Mashta Island. This 6 bed / 5 bath, 3,245 SF Mediterranean villa sits on a spacious 10,000 SF lot with lush landscaping, a resort-style pool, and a private cabana guest suite. Interiors with soaring 10-foot ceilings flow seamlessly to the outdoors, perfect for entertaining and relaxed island living. Intentionally designed with two primary suites (first floor and second floor) enhancing comfort and privacy. The chef’s kitchen features a gas stove, cooking island, and SubZero refrigerator. Enjoy private balconies, a circular driveway, an attached 2-car garage with laundry, covered porches, and generous storage. Key Biscayne offers the ultimate family lifestyle with world-class amenities and a true sense of community.
Facts
- MLS#
- A11776724
- Subdivision
- MASHTA ISLAND A REPLAT OF
- Property Type
- Residential
- Property Sub Type
- Single Family Residence
- Year Built
- 1961
- Lot Size
- 10,000 ft²
- Sq. Ft.
- 3,245 ft²
- Sq. Mt.
- 301 m²
- Price per sq. ft.
- $1,693/ft²
- Price per sq. mt.
- $18,256/m²
- Stories
- —
- Garage
- 2 spaces
- Pool
- —
- Days on Market
- 55 days
- Listed
- Apr 15, 2025
- Last Updated
- Jul 15, 2025
- Price/Lot Sq.Ft.
- $550/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
May 2026
45
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).
| 7/15/2025 | Sold | $5,495,000 |
| 4/15/2025 | Listed for sale | $5,495,000 |
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.
Our Lady Of Lourdes Academy9,10,11,12 · private · 1.3 mi
Our Lady of Lourdes Academy9,10,11,12 · private · 1.3 mi
St. Thomas Episcopal Parish SchoolPK,KG,1,2,3,4,5 · private · 1.3 mi
Epiphany Catholic SchoolPK,KG,1,2,3,4,5,6,7,8 · private · 1.3 mi
Sunset Elementary SchoolPK,KG,1,2,3,4,5 · public · 1.4 mi
The Mandelstam SchoolPK,KG,1,2,3,4,5 · private · 1.4 mi
The Mandelstam SchoolPK,TK,KG,1,2,3,4,5 · private · 1.4 mi
Riviera SchoolsPK,TK,KG,1,2,3,4,5,6,7,8,9,10,11,12 · private · 1.6 mi
Riviera Day SchoolPK,KG,1,2,3,4,5 · private · 1.6 mi
Rambam Day School Temple Beth AmPK,TK,KG,1,2,3,4,5 · private · 1.7 mi
Estimated Monthly Payment
$33,976/mo
Principal & Interest
$29,247
Property Tax
$4,579
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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