591 N Mashta Dr, Key Biscayne FL 33149, Key Biscayne
$15,500,000
Key Biscayne, FL, 33149
Property details
- Bedrooms
- 4
- Bathrooms
- 5
- Living area
- 4,290 sqft
- Year built
- 1960
- Type
- Single Family Residence
- Days on market
- 117
- MLS #
- A11924175
Listing courtesy of EXP Realty LLC · 888-883-8509. Listing agent: Cristina D Anglemont De Tassigny. MLS data last updated 2026-06-23.
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.
591 N Mashta Dr, Key Biscayne FL 33149, Key Biscayne — for sale, listed for $15,500,000 (4 bed, 5 bath, 4,290 sqft).
20 4-bed listings for sale in key biscayne · median $5,464,000.
Where is this market heading?
Our weekly snapshot archive tracks the median for 4-bed listings for sale in key biscayne: $1,637/sqft in 2026-W30 to $1,637/sqft in 2026-W31.
This history is computed from our own recorded market snapshots, not backfilled estimates.
n=20 · 2026-07-30 · Methodology
Are sellers cutting prices here?
30% of the 20 active 4-bed listings for sale in key biscayne have reduced their asking price at least once — a direct read on seller flexibility in this segment.
n=20 · 2026-07-30 · Methodology
Run the numbers
Competition for this listing
Right now: 20 active 4-bed listings for sale in key biscayne, median asking price $5,464,000, median $1,637/sqft.
n=20 · 2026-07-30 · Methodology
Browse this price segment
n=43 · 2026-07-30 · Methodology
Priced like this listing
The 4 active listings closest in price within the same market segment:
Observed price & status history
Asking price reduced from $16,950,000 to $15,500,000.
Market intelligence recomputed weekly from the full live MLS feed · 2026-07-30 · Methodology
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