MASHTA ISLAND
669 S Mashta Dr, Key Biscayne FL 33149
4 beds · 3.5 baths · 3,382 ft²
$5,799,000
Est. Payment $30,865/mo
4
Bedrooms
3.5
Bathrooms
3,382
Sq. Ft.
1960
Year Built
38
Days on Market
Description
Located on the exclusive and highly sought-after Mashta Island, this exceptional property offers a rare opportunity to build your dream home or enjoy the existing beautifully refurbished residence. The home features new bathrooms, updated flooring, and tasteful modern finishes throughout. Designed for relaxed Florida living, the spacious covered terrace overlooks a stunning mosaic-tiled pool, creating the perfect setting for entertaining or enjoying the tropical surroundings. A unique opportunity in one of Key Biscayne's most desirable neighborhoods. Easy to show.
Facts
- MLS#
- A12033340
- 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.
- $1,715/ft²
- Price per sq. mt.
- $18,468/m²
- Stories
- —
- Garage
- —
- Pool
- —
- Days on Market
- 38 days
- Listed
- Jun 5, 2026
- Last Updated
- Aug 11, 2026
- Price/Lot Sq.Ft.
- $580/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
August 2026
49
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).
| 8/11/2026 | Sold | $5,799,000 |
| 6/5/2026 | Listed for sale | $5,799,000 |
History reflects fields present on the live MLS record. Full multi-year history requires the MIAMI ListingHistory resource (not yet enabled).
Location
Estimated Monthly Payment
$35,847/mo
Principal & Interest
$30,865
Property Tax
$4,833
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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