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KAROL MARSDEN, PA          305-395-1975          karolrealtor@gmail.com

259 Saint Thomas Avenue, Key Largo, FL 33037

New Listing
$5,200,000
Property Type: Residential Bedrooms: 6 Baths: 8 Square Footage: 5,400 Lot Size (sq. ft.): 11,078 Status: Active
Current Price: $5,200,000 List Date: 10/21/2026 Last Modified: 10/21/2026

Overview

Description

Stunning brand-new waterfront estate offering 6 bedrooms and 8 bathrooms with modern designs and luxury finishes throughout. The gourmet kitchen features premium Sub-Zero appliances and flows seamlessly into spacious living and entertaining areas. Built for long-term durability with a metal roof, solar panels, and a water cistern system. Enjoy resort-style outdoor living with a custom pool, covered lounge areas, and a 55-foot private dock with a garage and tackle room, perfect for boaters and fishing enthusiasts. Experience the best of modern waterfront living in Key Largo. House is completely fenced not shown on pictures because all fencing is new.

Listing Details MLS# 621737

Location, Tax & Legal

Street #
259
Street Name
Saint Thomas
Street Suffix
Avenue
Key/Island
Key Largo
State/Province
FL
Zip Code
33037
County
Monroe
Subdivision
Port Largo (100.0)
Area
27 - Key Largo MM 97-107

Contract Information

Listing Board
Florida Keys

General Property Description

Realtor.COM Type
Residential - Single Family
Style
Single Family
Waterfront
Yes
Control Depth
6
Pool
Yes
Year Built
2026
Lot SqFt
11078
Acres
0.25
Living Apx SqFt
5400
SqFt Source
Builder/Architect
Total Bedrooms
6
Full Baths
8
Total Baths
8
Rentals Allowed
With Restrictions

Association Info

Mandatory Home Owners Asc
No
1st Right of Refusal
No

Dockage

Dock Length
55
Dock
Concrete

More Information

Building Style

Above Flood
Yes
# Stories
2 Stories

Property Features

Fee Includes: None Tax Exemptions: None Waterfront: Canal Front Waterview: Canal View Property Condition: New Construction Vehicle Storage: Garage Furnished: Unfurnished Cooling: Ceiling Fans(s); Central Air Utilities: Cistern; Solar Power Interior Features: Built-in Cabinets; Pantry; Walk-in Closet(s) Specialty Rooms: Laundry Room Appliances: Dishwasher; Microwave; Oven; Refrigerator; Stainless Steel Appliance(s) Exterior Features: Fencing; Gazebo; Lighting Pool Info: In Ground Construction: CBS Floor: Tile Pets: Pets Allowed Land Size: 1/4 - 1/2 Acre GF-Utilities: Cistern; Solar Panels
Listing Office: Golden International Realty
Last Updated: October - 21 - 2026
The data relating to real estate for sale on this web site comes in part from the Florida Keys MLS, Inc. Information provided is deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. The information being provided is for consumers’ personal, non-commeral use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. IDX data is deemed reliable but is not guaranteed accurate by the MLS.