MASHTA ISLAND A REPLAT OF
591 N Mashta Dr, Key Biscayne FL 33149
4 beds · 4.5 baths · 4,290 ft²
4
Bedrooms
4.5
Bathrooms
4,290
Sq. Ft.
1960
Year Built
2
Garage
117
Days on Market
Description
BEAUTIFUL AND UNIQUE WATERFRONT HOME ON EXCLUSIVE MASHTA ISLAND, ON DESIRABLE NORTH MASHTA DR IN KEY BISCAYNE. ELEVATED AND VERY COMFORTABLE 4BR/4.5BA + MAID’S QUARTERS WITH APPROX. 4,290 SQ FT UNDER A/C, SITTING ON A LARGE AND PRIVATE 15,184 SQ FT LOT, IDEAL FOR ENJOYING WITH FAMILY AND FRIENDS. APPROX. 50 FT DOCK WHERE THE OWNERS HAVE DOCKED BOATS OF AROUND 78 FT, WITH DEEP WATER OF ABOUT 8 FT EVEN AT LOW TIDE – A RARE TRUE DEEP-WATER ACCESS ON THE ISLAND. NORTH-FACING CANAL KEEPS THE HOUSE AND OUTDOOR AREAS PLEASANT AND COOLER ALL YEAR ROUND. EASY TO SHOW. BRING YOUR QUALIFIED BUYERS AND BEST OFFERS.
Facts
- MLS#
- A11924175
- Subdivision
- MASHTA ISLAND A REPLAT OF
- Property Type
- Residential
- Property Sub Type
- Single Family Residence
- Year Built
- 1960
- Lot Size
- 15,184 ft²
- Sq. Ft.
- 4,290 ft²
- Sq. Mt.
- 399 m²
- Price per sq. ft.
- $3,613/ft²
- Price per sq. mt.
- $38,847/m²
- Stories
- —
- Garage
- 2 spaces
- Pool
- —
- Days on Market
- 117 days
- Listed
- Nov 26, 2025
- Last Updated
- Aug 5, 2026
- Price/Lot Sq.Ft.
- $1,021/ft²
Comparable homes
Same ZIP, similar price + bedrooms.
$16,800,000
4 bd · 4 ba · 3,620 sqft
640 S Mashta Dr, Key Biscayne FL 33149
SOLD$17,200,000
4 bd · 4 ba · 3,085 sqft
520 S MASHTA DR, Key Biscayne FL 33149
SOLD$14,900,000
5 bd · 6 ba · 7,004 sqft
260 Harbor Dr, Key Biscayne FL 33149
SOLD$13,870,000
5 bd · 6 ba · 8,435 sqft
445 Grand Bay Dr # 1A, Key Biscayne FL 33149
SOLD$13,250,000
5 bd · 5 ba · 3,620 sqft
640 S Mashta Dr, Key Biscayne FL 33149
SOLD$12,500,000
3 bd · 3 ba · 4,510 sqft
511 N Mashta Dr, Key Biscayne FL 33149
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).
| 8/5/2026 | Sold | $15,500,000 |
| 3/20/2026 | Price change | $15,500,000-8.6% |
| 11/26/2025 | Listed for sale | $16,950,000 |
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
$95,564/mo
Principal & Interest
$82,498
Property Tax
$12,917
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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