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$23,500,000
337 Days On Site

631 N Mashta Drive
Key Biscayne, FL 33149

For Sale|Single Family Residence|Active
4
Beds
5
Total Baths
4
Full Baths
1
Partial Bath
2,255
SqFt
$10,421
/SqFt
1958
Built
Subdivision:
MASHTA ISLAND
County:
Miami-Dade

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631 N Mashta Drive631 N Mashta Drive631 N Mashta Drive631 N Mashta Drive
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BRING ALL OFFERS - Waterfront Dream Home in the Making! Key Biscayne's Ultimate Boater's Paradise - Fully Renovated Luxury Residence Coming Soon This is a rare and exceptional opportunity to own a like-new, fully renovated luxury home in one of Key Biscayne's most exclusive waterfront enclaves. Currently under an extensive renovation with expected completion in approximately 5 months, this residence is being reimagined with the highest standards of modern design, comfort, and functionality. A Complete Transformation - Inside and Out This is not just a cosmetic update — this is a down-to-the-studs, full-scale renovation that will result in a completely refreshed and reimagined home. Upon completion, this property will boast: "All-new flooring throughout with elegant, high-end finishes "Smooth new ceilings with upgraded lighting and architectural detailing "Completely new electrical and plumbing systems, built to current codes and standards "A redesigned layout to enhance flow, functionality, and natural light "Spacious bedrooms and luxurious bathrooms, featuring premium fixtures, modern vanities, custom tile work, and spa-like finishes "A chef's dream kitchen with custom cabinetry, oversized island, quartz countertops, and top-of-the-line appliances from leading brands "Brand-new air conditioning system for efficient, zoned climate control "Impact-resistant windows and doors . "Thoughtfully designed interior and exterior spaces, perfect for both relaxed family living and stylish entertaining. Waterfront Living at Its Finest Set on a 15,000 sq. ft. lot, this home offers spectacular water views and seamless access to Biscayne Bay. Boating enthusiasts will appreciate: "A private dock with deep water access, ideal for accommodating a large boat or yacht "No bridges to the ocean, allowing for effortless navigation to open waters "Direct bay access, just minutes from the Atlantic "An expansive backyard with space for outdoor dining, lounging, with pool "Unforgettable sunsets over the bay, right from your own backyard oasis. Prime Key Biscayne Location Located in a prestigious and tranquil section of Key Biscayne, this home offers both privacy and convenience. Enjoy world-class beaches, top-rated schools, parks, tennis clubs, fine dining, and more all just moments away from the heart of Miami. Whether you're searching for a personal waterfront sanctuary or a savvy long-term investment, this remarkable property delivers the best of luxury, lifestyle, and location with the added bonus of a brand-new renovation built for modern living. Now is the time to secure this extraordinary property before completion. Bring all offers - this one won't last.

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Listing Snapshot
Price 
$23,500,000
Days On Site 
337 Days
Bedrooms 
4
Inside Area (SqFt) 
2,255 sqft
Total Baths 
5
Full Baths 
4
Partial Baths 
1
Lot Size 
N/A
Year Built 
1958
MLS® Number 
R11060323
Status 
Active
Property Tax 
$99,103
HOA/Condo/Coop Fees 
N/A
Sq Ft Source 
Appraiser
Friends & Family
Recent Activity
11 months agoStatus changed to Active
11 months agoListing updated with changes from the MLS®
11 months agoListing first seen on site
General Features
Carport 
2
Direction Faces 
East
Levels 
One
Number Of Stories 
1
Parking 
Attached Carport
Parking Spaces 
5
Property Sub Type 
Single Family Residence
SqFt Total 
3720
Utilities 
None
Zoning 
0101
Interior Features
Cooling 
Central Air
Flooring 
Concrete
Furnished 
Unfurnished
Heating 
CentralElectric
Main Level Bedrooms 
4
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Exterior Features
Construction Details 
BrickConcrete
Lot Features 
Waterfront
Pool Features 
In GroundPrivate
Private Pool 
Yes
View 
Water
Waterfront 
Yes
Waterview 
Water
Community Features
Association Amenities 
Boating
Financing Terms Available 
CashConventional
MLS Area 
2290
Listing courtesy of Coldwell Banker



All listings featuring the BMLS logo are provided by BeachesMLS, Inc. This information is not verified for authenticity or accuracy and is not guaranteed. Copyright © 2026 BeachesMLS, Inc. (a Flex MLS feed)
Last checked: 2026-01-08 11:27 PM UTC

Neighborhood & Commute
Source: Walkscore
Disclosure: Community information and market data powered by Constellation Data Labs. Information is deemed reliable but not guaranteed.
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