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

Overview

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.

Listing Details MLS# A11782312

General Property Information

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

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

Contract Information

Comp Sale YN: No
Original List Price: 19000000
Occupant Type: Call Listing Agent

Location and Legal

Country: United States
County Or Parish: Miami-Dade
County Parish Name: Miami-Dade
Street Number: 510
Street Direction Prefix: S
Street Name: Mashta
Street Suffix: Drive
City Name: Key Biscayne
Municipal Code: 24
State Or Province: FL
Postal Code: 33149
Postal Code +4: 1733
Postal Zip: 33149
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
Special Assessment YN: No
Parcel Number: 2452050090190
Subdivision Number: 9
Zoning: 2001
Flood Zone: AE

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

Status Change Information

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
Buyer Financing: Conventional

More Information

Entry Information

Entry Level: Yes

Leasing Permitted Details

Leasing Permitted YN: Yes
Okay To Lease: Yes

Short Sale Details

Short Sale Addendum: No

Boat and Dock Information

Dock: Yes

Buyer Details

Intended Use: Unknown/Withheld

Concessions

Seller Concessions: No

Section Details

Parcel Number MLX: 0190

Originating Details

Originating System Key: 409940079
Originating System ID: M00000151

Office/Member Information

DXORIGMLSID: SEF

Amenities

Other: Yes

Dining Area

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

Flooring

Marble: Yes
Wood: Yes

Parking Features

Circular Driveway: Yes
Driveway: Yes
Garage Door Opener: Yes
Attached: Yes
Attached Garage: Yes
Garage: Yes

Property Condition

Resale: Yes

Possession

Close Of Escrow: Yes

Sewer

Public Sewer: Yes

Utilities

Cable Available: Yes

View

Garden: Yes

Heating

Central: Yes
Electric: Yes

Water View

Bay: Yes

Appliances

Dishwasher: Yes
Refrigerator: Yes

Construction Materials

CBS: Yes

Interior Features

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

Levels

Two: Yes

Listing Terms

Cash: Yes
Conventional: Yes

Pool Features

In Ground: Yes

Roof

Barrel: Yes

Security Features

Smoke Detector(s): Yes

Water Source

Public: Yes

Waterfront Features

Ocean Front: Yes

Boat and Dock Features

Private Dock: Yes

Cooling

Central Air: Yes
Electric: Yes

Showing Requirements

Call Listing Agent: Yes

Master Bedroom/Bath

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

Pets Allowed YN

Yes: Yes

Pets Allowed

Pet Restrictions Possible: Yes

Pool Size Details

Pool Size (WxL): No

Tax Information

Tax Reflects No Exemptions: Yes

Outdoor Living Spaces

Deck: Yes

Contingencies

Other: Yes

Room Types

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

Acreage Description

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

Room Information

Room Name
Den
Family Room
Maid/In-Law Quarters
Media Room

Listing Office: DLS International Realty

Last Updated: May - 09 - 2026

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