$19,900,000

481 S Mashta Drive, Key Biscayne FL 33149

5  beds
6.5  baths
5,940  sqft
Single Family Residence
Built in 2017
17,012 Square Feet lot
$3,350/sqft
309 days on market

About this property

Offering approximately 8,500 square feet of construction, this spectacular waterfront estate on coveted Mashta Island is a rare expression of space, privacy, and coastal elegance. Fully remodeled and designed for effortless indoor-outdoor living, this three-level contemporary residence enjoys direct ocean access, panoramic views of Smugglers Cove and Biscayne Bay, and constant ocean breezes that create a true sense of serenity. Set on a 17,012-square-foot lot in one of Key Biscayne’s most exclusive and tranquil enclaves, the property is surrounded by water, light, and lush tropical landscaping, offering remarkable privacy and a peaceful island atmosphere. The residence features 8,544 square feet of total area, including garage and terraces, with expansive open living spaces, refined finishes, abundant natural light, and impeccable craftsmanship throughout. The flexible floor plan allows for effortless reconfiguration to accommodate additional rooms and customized living areas. World-class amenities include a private dock for boating enthusiasts, resort-style pool, summer kitchen, spectacular covered entertainment level, elevator, gym, garage, and extra parking, creating an exceptional setting for both grand entertaining and everyday enjoyment. This is more than a home...it is a private waterfront sanctuary, offering the rare opportunity to experience the very best of island living in one of Key Biscayne’s most prestigious locations.

Interior Details

Bedrooms & bathrooms

  • Bedrooms: 5
  • Bathrooms: 6.5
  • Full bathrooms: 6

Heating & cooling

  • Heating: Electric
  • Cooling: Electric
  • Laundry: In Garage

Features

  • Flooring: Ceramic Floor, Wood
  • Window Features: Blinds

Extras

  • Appliances: Dishwasher, Disposal, Dryer, Electric Water Heater, Ice Maker, Microwave, Electric Range, Refrigerator, Wall Oven, Washer

Property Details

Parking

  • Garage spaces: 2
  • Parking features: Covered, Driveway, Paver Block

Features

  • Exterior features: Built-In Grill, Open Balcony
  • Has water view: Yes
  • Waterfront features: Ocean Access, Canal Front, Canal Width 1-80 Feet

Public Info

  • Lot Size: 17,012 Square Feet
  • Interior Livable Area: 5,940 sqft
  • Year Built: 2017
  • APN: 24-52-05-017-0110
  • County: Miami-Dade County

Tax Information

  • Annual Tax Amount: $84,924
  • Tax Year: 2024

HOA Details

  • Has HOA: Yes

Price History

2/11/2026 Listed for Sale
Source: Miami REALTORS®
$19,900,000
$3,350/sqft
1/27/2026 Listed for Rent
Source: Miami REALTORS®
$59,500
$10/sqft

Estimated Monthly Payment

Customize assumptions below to estimate your monthly cost.

Est.
$116,967
Principal & Interest $103,257
Property Taxes $7,077
Home Insurance $6,633
HOA Fees $0

Walk Score

Walk Score
15
Walk Score®
Car-Dependent
Transit Score
0
Transit Score®
Full Walk Score
Bike Score
36
Bike Score®
Somewhat Bikeable
Kevin McCarthy
Kevin McCarthy
Broker & Executive Director of Luxury Sales






    By proceeding, you consent to receive calls and texts at the number you provided, including marketing by autodialer and prerecorded and artificial voice, and email, from miamiforward.com and about your inquiry and other home-related matters, but not as a condition of any purchase.






      By proceeding, you consent to receive calls and texts at the number you provided, including marketing by autodialer and prerecorded and artificial voice, and email, from miamiforward.com and about your inquiry and other home-related matters, but not as a condition of any purchase.