House in Key Biscayne, FL 33149Mashta Island, 631 N Mashta Dr
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$18,500,000
4
Beds41/2
Baths2,255
SqFtStatus
Active
Size
2,255 SqFt (209 m2)
Price
$8,204/SqFt ($88,308/m2)
Type
House
Built
1958
MLS Number
B26058354
View
Bay, Intercoastal, Pool, Water
On Site
14 Days
Updated
1 Days ago
Page Views
0
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. Currently unde... Read more
Features
Bedrooms
- Bedrooms: 4
Bathrooms
- Bathrooms: 4
- Half Bathrooms: 1
Exterior and Lot Features
- Exterior Features: Garden, OutdoorLivingArea
- View: Bay, Intercoastal, Pool, Water
Interior, Heating and Cooling
- Interior Features: DualSinks, EntranceFoyer, LivingDiningRoom, WalkInClosets
- Equipment / Appliances: Cooktop, Dryer, Dishwasher, EnergyStarQualifiedDishwasher, EnergyStarQualifiedDryer, EnergyStarQualifiedFreezer, EnergyStarQualifiedRefrigerator, EnergyStarQualifiedWasher, ElectricCooktop, ElectricWaterHeater, FreeStandingFreezer, Microwave, Oven, Refrigerator, WaterHeater, WineRefrigerator, Washer
- Heating Description: Central,Electric
- Cooling Description: CentralAir
Building and Construction
- Floor Description: Concrete, Laminate, Tile
- Windows/Treatment: StormWindows
- Construction Type: House
- Year Built: 1958
Waterfront and Water Access
- Waterfront Frontage: Yes
School Information
- Elementary School: Key Biscayne K-8
- Middle School: Ponce De Leon
- Senior High School: Coral Gables
Other Property Info
- Listing Date: 2026-07-30T14:40:51.000-00:00
- Directions: East
- Pets Allowed: NoPetRestrictions, Yes
Taxes, Fees & More
- Taxes: 112485
- Parking Description: AttachedCarport, CircularDriveway, Carport, Driveway
- Total Floors in Building: 1
Apples-to-Apples Comparables
Price History
Date
Event
Price
Change
Price Per
07/30/2026
Listed
$18.5M
$8,204 ft2
$88,308 m2
07/30/2026
$18.5M
Event
Listed
Price Per
$8,204 ft2
$88,308 m2
Price per square foot and days on website are not provided values and are calculated by Subdivisions.
Listed by Javier Quiroz • Coldwell Banker • Buyer Agency Compensation .
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Community Snapshot
4 to 4 BR
Bedrooms
$16.8M to $18.5M
Price Tier
2,255 - 10,820
SqFt Range
1973
Year Build
1
Total Floors
71
Total Units
Key Biscayne Ultra Luxury Ultra Luxury Homes & Condos
- Biscayne Key Estates House10
- Cape Florida House6
- Casa Del Mar Mixed2
- Club Tower Condo3
- Grand Bay Tower Condo5
- Holiday Colony House0
- Island House Co-Op4
- Key Cassa Condo2
- Lake Villa Condo2
- Mashta Island Mixed2
- Matheson Estates House0
- Ocean Tower Condo6
- Oceana Key Biscayne Mixed7
- Resort Villa Condo1
- Sands Of Key Biscayne Condo3
- The Ritz-Carlton Key Biscayne Condo1
- Tropical Isle Homes House13
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