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6 Beds
7 Baths
6,468 sqft

$19,750,000

1080 Mariner, Key Biscayne FL, 33149

Price per sqft$3,053.49
Built in2018
Property size6,468 sqft
Property typeResidential
Courtesy of Alina De La Vega with One Sotheby's International Realty

Overview

Active

Listed Nov 4, 2026

Updated 7 days ago

Spanning over 6,200 sq. ft. with 6 bedrooms and 6.5 baths, the home sits at the end of a private cul-de-sac with sweeping water and mangrove views. A dramatic entry opens to light-filled living spaces with floor-to-ceiling glass, wide-plank European oak floors, and custom millwork throughout. The sleek chef’s kitchen features Italian cabinetry, a marble waterfall island, and top-of-the-line Miele and Sub-Zero appliances. The primary suite offers a private sitting area, expansive custom closets, and a spa-style bathroom with book-matched marble, freestanding soaking tub, dual vanities, and glass-enclosed rain shower. Secondary suites are equally refined, each with bespoke finishes and private baths. Seamlessly connecting indoors and outdoors, the residence showcases covered terraces with natural stone flooring, a summer kitchen with custom cabinetry and Wolf appliances, and a resort-style pool surrounded by tropical gardens curated by CCLA. A private dock with direct Biscayne Bay access completes the waterfront lifestyle. Located within one of Miami’s most coveted island communities, this estate blends modern craftsmanship with timeless design, just minutes from pristine beaches, parks, dining, and top-rated schools.

$131,397/mo

Est. mortgage payment based on a $19,750,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
A12117649

Interior Features

Bedrooms
6
Bathrooms
7
Cooling
Yes
Heating
Yes
Basement
No

Exterior Features

Lot Size
0.3 Acres

Other Property Details

Taxes
$138,676
Tax Frequency
Annually
View
Yes
Pool
Yes
Waterfront
Yes
55+/Senior Community
Yes

Also listed on RMLS & RAGFL

MLS provider logo

Courtesy of One Sotheby's International Realty, Alina De La Vega,
Listing Contact: 305-335-8219 

Based on information from Martin County REALTORS of the Treasure Coast, Inc. (RAMC) as of 11/6/2026. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent.

©2026 Martin County REALTORS of the Treasure Coast, Inc. All rights reserved.

Data last updated 4:48 AM UTC, 11/6/2026

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