Mashta Island 631 N Mashta For Sale, B26058354
631 N Mashta, Key Biscayne, FL 33149
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$18,500,000
for sale
4 beds
4.5 baths
2,255 sf
/sf
$8,204.00
| Monthly cost | |
| Maintenance per month | $0.000000/ |
| Taxes per year | $112,485 |
| Waterfront | Yes |
| Type | Single Family |
| MLS | B26058354 |
Listing Description
BRING ALL OFFERS! Exceptional waterfront opportunity in prestigious Key Biscayne. Set on a 15,000 sq. ft. lot with 100 feet of water frontage, this residence offers open-water views, direct Biscayne Bay access, and no fixed bridges to the ocean. Curren...
Listing information courtesy of Coldwell Banker. Source: BeachesMLS. Data updated 08/31/2026.
Facts and Features
Type
Single Family
Year Built
1958
Heating
Central
Cooling
Central Air
Parking
2 Or More Spaces
Swimming pool
Yes
HOA
$0.000000/
Days on market
32
Status
Active
Features
Bedrooms
Beds: 4
Heating:
Central, ElectricCooling:
Central AirEquipment Appliances:
Electric Water Heater, Dishwasher, Dryer, Free-Standing Freezer, Microwave, Refrigerator, Self Cleaning Oven, Wall Oven, WasherWindows Treatment:
Complete Impact GlassFlooring
Floor Description: Concrete, Tile
Interior features:
Entrance Foyer, Walk-In Closet(s)Water Access:
Dock Available, Private Dock, Unrestricted Salt Water Access, Electric Available, Private DockLot Description
Lot: 15,000 sqft
Lot depth: 0 ft
Lot frontage: 0 ft
Building
Amenities:
Boat Dock, Private PoolParking
Parking: Attached garage
Parking description: 2 Or More Spaces, Circular Driveway, Driveway
Construction
Construction Type:
Concrete Block Construction, BrickListing Type:
Exclusive Right To SellProperty Type:
ResidentialStyle:
HouseRoof Description:
Comp Shingle Roof, ShingleFinance
Taxes:
$112,485HOA
HOA Fee: $0.000000//mo
Estimated monthly cost
Use this montgage calculator to calculate your monthly montgage payments quickly and easily
Mashta Island Overview
Avg. days on market
67
SF range
2,255-3,620sf
Price range for Sale
$6.4m - 19.9m
Price range for Rent
$15.5k - 75k
Median Sale price per sqft
$5.4k
Median Rent price per sqft
$7.7
Avg. Sale price
$15.4m
Avg. Rent price
$35.9k
