500 S Mashta Drive, Key Biscayne, FL 33149

$17,400,000

Virtual Tour

https://player.vimeo.com/external/391001603.hd.mp4?s=254a474f1b1c77ab4b3b076c63ec074c6a341593&profile_id=175

Illuminated infinity edge pond, pool and spa.

Modern architecture facade and 4-car glass door garage.

Master bedroom private terrace with ocean views.

Evening view of 59'x6' pond, 46'x16' pool and 7'x8' attached spa.

Rear facade featuring a three-story curved glass curtain wall.

Patio area featuring a retractable awning.

Panoramic ocean views from patio, pond and pool deck.

Ocean views from third floor bedroom terrace.

Gardens by landscape architect Mercedes Porcari.

Property Type: Residential Bedrooms: 6 Baths: 8 Square Footage: 14,969 Status: Closed

Current Price: $17,400,000 List Date: 2/04/2020 Last Modified: 12/24/2025

Overview

Description

Enjoy ocean and sunset views from this 2014 Mashta Island estate on a 23,814 SqFt oversized lot with 138ft of water frontage. This custom-built home, inspired by Modern architect Richard Meier, features pure geometric lines and integrated open spaces with an emphasis on natural light. Unique features include a 3-story curved glass curtain wall, 14 skylights over a 27-ft high atrium, NanaWall folding glass doors, elevator, gym, dock, staff quarters, 4-car garage, generator and smart home technology.

Listing Details MLS# A10811961

General Property Information

Property Sub Type: Single Family Residence
Bedrooms Total: 6
Bathrooms Total: 8
Bathrooms Full: 6
Bathrooms Half: 2
Building Area Main: 14969
Living Area Main: 10820
Adjusted Area Main: 11149
Year Built: 2014
Garage YN: Yes
Attached Garage YN: Yes
Garage Spaces: 4
Covered Spaces: 4
Lot Size Area: 23814
Lot Size Acres: 0.55
Lot Size Dimensions: 126x189
Senior Community YN: Yes
Waterfront YN: Yes
Water Frontage Feet: 138
Outdoor Living Spaces YN: Yes
Stories Total: 3
Direction Faces: Southwest
Pool Private YN: Yes
Spa YN: Yes
Furnished: Unfurnished

Property Features

Dining Area: Breakfast Area; Eat-In Kitchen; Formal Dining Exterior Features: Awning(s); Lighting Flooring: Marble; Wood Parking Features: Garage Door Opener; Guest; Attached; Attached Garage; Garage Property Condition: New Construction Appliances: Dishwasher; Disposal; Dryer; Gas Range; Microwave; Refrigerator; Washer Water Heater Details: Electric Water Heater; Gas Water Heater Boat and Dock Features: Hoist/Davit; Private Dock Construction Materials: CBS Cooling: Central Air; Electric Fencing: Fenced Heating: Central; Electric Interior Features: Built-in Features; Central Vacuum; Closet Cabinetry; Elevator; Entrance Foyer; High Ceilings; Storage; Walk-In Closet(s) Levels: Three Or More Listing Terms: Cash; Conventional Lot Features: Oversized Lot Pool Features: Heated; Pool Sweep; Pool/Spa Combo Possession: Negotiable Restrictions: No Restrictions Roof: Metal Security Features: Security System; Smoke Detector(s) Sewer: Public Sewer Special Information: Sold As-Is Sprinkler Description: Auto Sprinkler Tax Information: City/County Utilities: Cable Available Water Access: Ocean Access Water Source: Public Water View: Bay; Direct Ocean Waterfront Features: Bayfront; Ocean Front; Seawall Window Features: Blinds; Skylight(s); Tinted Windows Showing Requirements: Call Listing Agent Outdoor Living Spaces: Deck; Patio Contingencies: None Room Types: Atrium; Den; Family Room; Laundry; Maid/In-Law Quarters Acreage Description: 1/2 To Less Than 1 Acre Lot

Contract Information

Comp Sale YN: No
Original List Price: 18200000
Occupant Type: Owner

Location and Legal

Country: United States
County Or Parish: Miami-Dade
County Parish Name: Miami-Dade
Street Number: 500
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: Madison
Parcel Number: 2452050090200
Subdivision Number: 9
Zoning: 2001
Flood Zone: AE
Directions: Once you enter the village of Key Biscayne, turn right onto Harbor Drive. After 1.6 miles, turn right onto W Mashta Drive. After 0.2 miles, 500 S Mashta will be straight ahead of you.

Financial Information

Membership Fee Required YN: No
Tax Annual Amount: 208849
Tax Year: 2015
Tax Legal Description: 5-6 55 42 PB 65-65 MASHTA ISLAND A REPLAT OF TRS A B & C PB 65-65 LOT 19 BLK 3 LOT SIZE 126.000 X 189 COC 23768-4016 09 2005 1

Status Change Information

Major Change Timestamp: 2021-04-13T23:44:28Z
Major Change Type: Status Change
Price Change Timestamp: 2021-02-22T16:00:41Z
Status Change Date: 2021-04-27
Under Contract Date: 2021-02-16
Close Date: 2021-04-13
Close Price: 17400000
Buyer Financing: Cash

More Information

Boat and Dock Information

Dock: Yes

Pool Size Details

Pool Size (WxL): 46x16

Storm Protection

Impact Glass: Partial

Buyer Details

Intended Use: Unknown/Withheld

Concessions

Seller Concessions: No

Price Calculations

Current Price To SqFt: 1608.13

Section Details

Parcel Number MLX: 0200

Originating Details

Originating System Key: 342860384
Originating System ID: M00000151

Office/Member Information

DXORIGMLSID: SEF

Amenities

None: Yes

Dining Area

Breakfast Area: Yes
Eat-In Kitchen: Yes
Formal Dining: Yes

Exterior Features

Awning(s): Yes
Lighting: Yes

Flooring

Marble: Yes
Wood: Yes

Parking Features

Garage Door Opener: Yes
Guest: Yes
Attached: Yes
Attached Garage: Yes
Garage: Yes

Property Condition

New Construction: Yes

Fencing

Fenced: Yes

Possession

Negotiable: Yes

Sewer

Public Sewer: Yes

Special Information

Sold As-Is: Yes

Utilities

Cable Available: Yes

Heating

Central: Yes
Electric: Yes

Sprinkler Description

Auto Sprinkler: Yes

Water Access

Ocean Access: Yes

Water View

Bay: Yes
Direct Ocean: Yes

Window Features

Blinds: Yes
Skylight(s): Yes
Tinted Windows: Yes

Appliances

Dishwasher: Yes
Disposal: Yes
Dryer: Yes
Gas Range: Yes
Microwave: Yes
Refrigerator: Yes
Washer: Yes

Construction Materials

CBS: Yes

Interior Features

Built-in Features: Yes
Central Vacuum: Yes
Closet Cabinetry: Yes
Elevator: Yes
Entrance Foyer: Yes
High Ceilings: Yes
Storage: Yes
Walk-In Closet(s): Yes

Levels

Three Or More: Yes

Listing Terms

Cash: Yes
Conventional: Yes

Lot Features

Oversized Lot: Yes

Pool Features

Heated: Yes
Pool Sweep: Yes
Pool/Spa Combo: Yes

Roof

Metal: Yes

Security Features

Security System: Yes
Smoke Detector(s): Yes

Water Source

Public: Yes

Waterfront Features

Bayfront: Yes
Ocean Front: Yes
Seawall: Yes

Water Heater Details

Electric Water Heater: Yes
Gas Water Heater: Yes

Boat and Dock Features

Hoist/Davit: Yes
Private Dock: Yes

Cooling

Central Air: Yes
Electric: Yes

Showing Requirements

Call Listing Agent: Yes

Master Bedroom/Bath

Bidet: Yes
Dual Sinks: Yes
Master Bdrm - Sitting: Yes
Master Bdrm - Upstairs: Yes
Separate Shower: Yes
Separate Tub: Yes
Whirlpool Tub: Yes

Restrictions

No Restrictions: Yes

Tax Information

City/County: Yes

Outdoor Living Spaces

Deck: Yes
Patio: Yes

Contingencies

None: Yes

Room Types

Atrium: Yes
Den: Yes
Family Room: Yes
Laundry: Yes
Maid/In-Law Quarters: Yes

Acreage Description

1/2 To Less Than 1 Acre Lot: Yes

Room Information

Room Name
Atrium
Den
Family Room
Maid/In-Law Quarters
Laundry

Listing Office: One Sotheby's International Realty

Last Updated: December - 24 - 2025

This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. Copyright 2026 Beaches Multiple Listing Service, Inc. All rights reserved. Information Not Guaranteed and Must Be Confirmed by End User. Site contains live data.

500 S Mashta Drive, Key Biscayne, FL 33149 (MLS# A10811961)