$16,800,000
Active
59d
$16,800,000
640 Mashta
Key Biscayne, FL 33149
4 bd4 ba3,620 sqft
Mashta Island
$12,980,000374 days on marketActive
420 Island Drive, Key Biscayne, FL 33149
Key Biscayne, FL 33149
6
Beds
6.5
Baths
6,405
Sq Ft
$2,027
$/Sq Ft
2017
Year Built
0.31 acres
Lot Size
Listing Snapshot
| List Price | $12,980,000 |
| Price / Sq Ft | $2,027 |
| Beds | 6 |
| Baths | 6.5 |
| Living Area | 6,405 sqft |
| Lot Size | 0.31 acres |
| Year Built | 2017 |
| Property Tax | $88,746/yr |
| MLS # | 1118024468 |
| Status | Active |
| Days on Market | 374 |
About This Home
Spectacular and impeccably appointed modern residence situated on a 13,651 SF lot on prestigious Island Drive—one of Key Biscayne’s most elevated streets. Boasting a total of 8,011 SF, this 6-bedroom, 6 full bath + 2 half bath home is open, bright, and flooded with natural light throughout. Enjoy breathtaking water views and private access to the water in a setting that blends refined luxury with ultimate privacy. This residence showcases exquisitely curated, high-end designer finishes, a dramatic wine cellar, two expansive family rooms, and a closed 2-car garage. The outdoor living area is equally impressive, featuring a sleek summer kitchen and lush, professionally designed landscaping—ideal for elegant island living and entertaining. Per approved plans 6,405 SF under AC -8,682 SF Total
General Features
- Property Type
- Residential
- Sub-type
- SingleFamilyResidence
- Stories
- 2
- Direction Faces
- West
- Parking
- Covered,Garage,GolfCartGarage,GarageDoorOpener
- Zoning
- 2000
- Subdivision
- CAPE FLORIDA SUB SEC 1
Interior Features
- Appliances
- ElectricWaterHeater,IceMaker,Microwave,Oven,Refrigerator,Washer
- Flooring
- Marble
- Heating
- Central
- Cooling
- CentralAir
- Interior Features
- Bidet,BuiltInFeatures,Bathtub,DualSinks,HighCeilings,KitchenIsland,CustomMirrors,MainLevelPrimary,Pantry,SittingAreaInPrimary,SplitBedrooms,SoakingTub,SeparateShower,VaultedCeilings,WalkInClosets
- Laundry
- LaundryTub
Exterior Features
- Construction
- Block
- Exterior Features
- Other
- Roof
- Aluminum,Other
- Lot Features
- QuarterToHalfAcreLot
- Pool
- Yes
- Pool Features
- InGround
- View
- Canal
- Waterfront
- Yes
- Waterfront Features
- CanalFront
Community Features
- Association Amenities
- None,BoatDock
- MLS Area
- 2520
Schools
ElementaryKey Biscayne K-8
MiddlePonce De Leon
HighCoral Gables
Map
Virtual Tour
View Virtual TourListed by Elena Chacon · BHHS EWM Realty
MLS# 1118024468 · BEACH
Information deemed reliable but not guaranteed. © 2026 BEACH.
MLS# 1118024468 · BEACH
Information deemed reliable but not guaranteed. © 2026 BEACH.
Interested in this home?
Schedule a showing or ask a question — buyer representation is free.
Estimate Your Payment
$
20% down · Loan: $10,384,000
%
Est. Monthly$78,233
Principal & Interest$70,837
Property Tax$7,396
Estimate only. Does not include insurance or PMI. Rate is illustrative — contact us for current rates.
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