1080 Mariner Dr, Key Biscayne FL 33149

House For Sale

$19,750,000

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ETH: 8,777.77777778

New

Waterfront

For Sale

House

6 bds •

6 ba •

6,468 sqft

Overview

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.

Location

Florida • Key Biscayne • 33149 • House • For Sale • Waterfront

Details

Type:

Residential

Parking:

Driveway / Paver Block

Year Built:

2018

Lot:

12900 Square Feet

Heating:

Central / Electric

Price/sqft:

$3,053

Cooling:

Central Air / Electric

HOA:

No Data

Type:

Residential

Parking:

Driveway / Paver Block

Year Built:

2018

Lot:

12900 Square Feet

Heating:

Central / Electric

Price/sqft:

$3,053

Cooling:

Central Air / Electric

HOA:

No Data

Private inquiry

Talk to the advisor on this listing.

Floor plans, HOA docs, off-market comparables, scheduling a private showing — one message, direct to the local specialist.

Valuation

Our model vs. what's actually selling nearby.

Estimate

$23,500,000

$18.1M – $30.8M

Confidence Low

List vs. estimate

$3.8M below estimate

List $19,750,000 · -16.0%

Our model says this listing is priced below recent comparable activity. Expect competition.

Price per sq ft

$3,053

+56.9% vs. city median $1,946

Based on

5 MLS comparables

+ 30 public-records sales within 0.5 mi

Median actual sale: $2.5M

Median of recent comparable listings. Sold comps use closing price, active listings use list price.

Highlights

Annual tax

$138,676

2025

Pool

Other

View

Canal, Pool

Waterfront

Ocean Access

Garage

2 car garage

All facts and features

Flooring

• Tile

Heating

• Central

• Electric

Cooling

• Central Air

• Electric

Appliances

• Dishwasher

• Disposal

• Dryer

• Microwave

• Wall Oven

• Washer

Other interior features

• First Floor Entry

• Cooking Island

• Family Room

Bedrooms and bathrooms

• Bedrooms: 6

• Bathrooms: 1

• Full bathrooms: 6
Parking

• Driveway

• Paver Block

Property

• Exterior Features: Barbeque

Lot

• Lot: 12900 Square Feet

Other Property Information

• Parcel Number: 24-52-05-011-0160

• Zoning: 2000
Type and style

• Property Type: Residential

• Property Sub Type: Single Family Residence
Other financial information

• Annual tax amount: $138,676
Source details

• MLS ID: A12117649

Other facts

• Construction Materials: CBS Construction

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

• Pool Features: Other

• Direction Faces: South

• Architectural Style: Detached / Two Story

• Waterfront: Yes

• Garage Spaces: 2

• Garage: Yes

• Living Area: 6468

• Water Source: Municipal Water

• Subdivision Name: CAPE FLA SUB SEC 2

Private inquiry

Talk to the advisor on this listing.

Floor plans, HOA docs, off-market comparables, scheduling a private showing — one message, direct to the local specialist.

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Market around this address

Live counts in the same area.

The multiple listing information is provided by the Miami Association of REALTORS® from a copyrighted compilation of listings. The compilation of listings and each individual listing are ©2026-present Miami Association of REALTORS®. All Rights Reserved. The information provided is for consumers' personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Listing courtesy of: One Sotheby's International Realty

1080 Mariner Dr, Key Biscayne FL 33149

Overview

Location

Details

Valuation

Highlights

Interior details

Property details

Construction details

HOA and Financial Details

Other

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