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Active Under Contract$15,500,000
Key Biscayne, FL, 33149
Active Under Contract$15,500,000
4
Bedrooms
5
Bathrooms
4,290 sqft
Living Area
1960
Year Built
Estimate your monthly payment for this waterfront property
$3,100,000 down
Estimated payments only. Actual rates and terms may vary.
15,184
Lot Size (sqft)
72
Days on Market
Dock Score™
DockOnlyWhat shaped this score
DockOnly.com rating — not provided by the MLS or listing broker.
AI Aerial Imagery Detection
Detected by AI from open-source aerial mapping imagery and may not reflect current conditions. This information was not provided by the MLS or listing broker. Always verify dock infrastructure with the listing agent.
Range 466–494 ft over the next 200 ft of canal
Width sampled every 10 ft from dock · perpendicular measurement
Will it turn around?
Up to 221 ft
Easy
handling
221–295 ft
Fits
with care
295–340 ft
Tight
(back-in)
Boats over 340 ft can't turn around here — back in/out only. Clear channel ≈ 443 ft once boats are docked both sides (FL rules cap each side ~20 ft). Wide-beam yachts need the upper end of each range.
Data sources: SFWMD AHED waterway polygons · FHWA National Bridge Inventory 2024 · Not provided by the MLS or listing broker.
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.
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Key Biscayne, FL, 33149
Listing courtesy of EXP Realty LLC
Last updated: 6/23/2026
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Dock Score™
DockOnlyWhat shaped this score
DockOnly.com rating — not provided by the MLS or listing broker.
Assigned Public Schools
Key Biscayne K-8 Center
Grades PK-8 · Key Biscayne
Ponce de Leon MS
Grades 6-8 · Coral Gables
Coral Gables Senior High
Grades 9-12 · Coral Gables
Nearby Private Schools
School data from Miami-Dade County Open Data Hub. Verify attendance zones with the school district.