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510 S Mashta Drive, Key Biscayne, FL 33149

$18,921,250

Virtual Tour

http://www.510smd.com/

Property Type: Residential Bedrooms: 5 Baths: 7 Square Footage: 5,992 Status: Closed

Current Price: $18,921,250 List Date: 4/11/2025 Last Modified: 5/09/2026

Description

Waterfront. Located on Mashta Island and island within an island in Key Biscayne. The minute you walk into the house the most breathtaking Biscayne Bay views welcomes you. Breathtaking sunsets.Oversized Lot:18,300-sq.ft. 2 story home with excellent floor plan,Large living room area w/double height ceilings, family room adjacent to Kitchen area. Large dining area w/direct water views & access to pool area. 2nd floor: Master suite & 3 additional bedrooms en suite Master suite w/balcony & large walk in closet .1st floor Guest suite.Water views from every room, dining & reception area.Gazebo by the water.Open kitchen. staff area.powder room.oversized pool w/Cabana room &cabana bath.Double access ( service access &main access) Lush garden offers total privacy . Enclosed two car garage.

More Information MLS# A11782312

Contract Information

Comp Sale YN: No Occupant Type: Call Listing Agent Listing Date: 2025-04-11 Status: Closed Original List Price: 19000000 Sold Price: $18,921,250 Current Price: $18,921,250

Location and Legal

County Or Parish: Miami-Dade County Parish Name: Miami-Dade City Name: Key Biscayne Municipal Code: 24 Postal Zip: 33149 Subdivision Number: 9 Special Assessment YN: No Flood Zone: AE Country: United States Street Number: 510 Street Direction Prefix: S Street Name: Mashta Street Suffix: Drive State Or Province: FL Postal Code: 33149 Postal Code +4: 1733 Subdivision Name: MASHTA ISLAND A REPLAT OF Area: 2520 Elementary School: Key Biscayne K-8 Middle Or Junior School: Ponce De Leon High School: Coral Gables Parcel Number: 2452050090190 Zoning: 2001

General Property Information

Adjusted Area Main: 5274 Living Area Main: 5226 Lot Size Area: 18300 Water Frontage Feet: 0 Senior Community YN: Yes Outdoor Living Spaces YN: Yes Stories Total: 2 Pool Private YN: Yes Property Sub Type: Single Family Residence Bedrooms Total: 5 Bathrooms Total: 7 Bathrooms Full: 6 Bathrooms Half: 1 Building Area Main: 5992 Year Built: 1981 Garage YN: 1 Attached Garage YN: 1 Garage Spaces: 2 Covered Spaces: 2 Lot Size Acres: 0.42 Waterfront YN: 1 Direction Faces: East

Financial Information

Membership Fee Required YN: No Tax Annual Amount: 172413 Tax Year: 2024 Tax Legal Description: 5-6 55 42 MASHTA ISLAND A REPLAT OF TRS A B & C PB 65-65 LOT 18 BLK 3 LOT SIZE 100.000 X 183 OR 19131-0507 05 2000 1

Office/Member Information

DXORIGMLSID: SEF

Status Change Information

Buyer Financing: Conventional Major Change Timestamp: 2025-07-08T22:24:19Z Major Change Type: Status Change Status Change Date: 2025-07-08 Under Contract Date: 2025-05-13 Close Date: 2025-07-08 Close Price: 18921250

Amenities

Other: 1

Dining Area

Breakfast Area: 1 Dining/Living Room: 1 Eat-In Kitchen: 1

Entry Information

Entry Level: 1

Flooring

Marble: 1 Wood: 1

Leasing Permitted Details

Leasing Permitted YN: Yes Okay To Lease: 1

Parking Features

Circular Driveway: 1 Driveway: 1 Garage Door Opener: 1 Attached: 1 Attached Garage: 1 Garage: 1

Property Condition

Resale: 1

Short Sale Details

Short Sale Addendum: No

Possession

Close Of Escrow: 1

Sewer

Public Sewer: 1

Utilities

Cable Available: 1

View

Garden: 1

Heating

Central: 1 Electric: 1

Water View

Bay: 1

Appliances

Dishwasher: 1 Refrigerator: 1

Construction Materials

CBS: 1

Interior Features

Bedroom Layout - Split: 1 Built-in Features: 1 Closet Cabinetry: 1 High Ceilings: 1 Storage: 1

Levels

Two: 1

Listing Terms

Cash: 1 Conventional: 1

Pool Features

In Ground: 1

Roof

Barrel: 1

Security Features

Smoke Detector(s): 1

Water Source

Public: 1

Waterfront Features

Ocean Front: 1

Boat and Dock Information

Dock: Yes

Boat and Dock Features

Private Dock: 1

Cooling

Central Air: 1 Electric: 1

Showing Requirements

Call Listing Agent: 1

Master Bedroom/Bath

Bedroom On Entry Level: 1 Dual Sinks: 1 Master Bdrm - Ground: 1 Separate Shower: 1 Separate Tub: 1

Pets Allowed YN

Yes: 1

Pets Allowed

Pet Restrictions Possible: 1

Pool Size Details

Pool Size (WxL): 0

Tax Information

Tax Reflects No Exemptions: 1

Outdoor Living Spaces

Deck: 1

Contingencies

Other: 1

Room Types

Den: 1 Family Room: 1 Maid/In-Law Quarters: 1 Media Room: 1

Buyer Details

Intended Use: Unknown/Withheld

Concessions

Seller Concessions: No

Section Details

Parcel Number MLX: 0190

Acreage Description

1/4 To Less Than 1/2 Acre Lot: 1

Originating Details

Originating System Key: 409940079 Originating System ID: M00000151

Property Features

Dining Area: Breakfast Area; Dining/Living Room; Eat-In Kitchen Flooring: Marble; Wood Leasing Permitted Details: Okay To Lease Parking Features: Circular Driveway; Driveway; Garage Door Opener; Attached; Attached Garage; Garage Property Condition: Resale Appliances: Dishwasher; Refrigerator Boat and Dock Features: Private Dock Construction Materials: CBS Cooling: Central Air; Electric Heating: Central; Electric Interior Features: Bedroom Layout - Split; Built-in Features; Closet Cabinetry; High Ceilings; Storage Levels: Two Listing Terms: Cash; Conventional Pets Allowed YN: Yes Pets Allowed: Pet Restrictions Possible Pool Features: In Ground Possession: Close Of Escrow Roof: Barrel Security Features: Smoke Detector(s) Sewer: Public Sewer Tax Information: Tax Reflects No Exemptions Utilities: Cable Available View: Garden Water Source: Public Water View: Bay Waterfront Features: Ocean Front Showing Requirements: Call Listing Agent Outdoor Living Spaces: Deck Contingencies: Other Room Types: Den; Family Room; Maid/In-Law Quarters; Media Room Acreage Description: 1/4 To Less Than 1/2 Acre Lot

Room Information

Den Family Room Maid/In-Law Quarters Media Room

Listing Office: DLS International Realty

Last Updated: May - 09 - 2026

510 S Mashta Drive, Key Biscayne, FL 33149- MLS# A11782312

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