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Pristine Island with Sandy Beaches

Main Key Barnes Sound, Key Largo, FL 33037

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For Sale

$4,395,000

LAND - Key Largo, FL

Lot size:

145.50 Acres

HighLights

Private 145.5‑acre island with over a mile of pristine white sandy beaches.
Tiff Deed ownership with no ROGO requirements for building a substantial structure on 12 upland acres.
Over 4 miles of mangrove shoreline teeming with wildlife.
Existing dock permit with lift, platform, and mooring slip.
Second dock permit pending for a 135 ft dock with a 40 ft platform and seven pilings to moor a vessel up to 100 ft.
Historically significant location ('The Tides at Main Key') used in marine weather forecasts.

We can help!

Listing Contact

KELLY K SHAW PA

Learn more

For Sale

$4,395,000

LAND - Key Largo, FL

Lot size:

145.50 Acres

Added:: Sep 3, 2025
Days on Market:: 285
Last Refresh:: Jun 14 at 2:06 pm

Property Features for Main Key Barnes Sound

General Information

Property type: Land
Property subtype: Other
Zoning: OS - Offshore Island Dist
Standard status: Active
APN: 00091640-000000
Lot size: 145.50 Acres

Taxes and HOA fees

Tax Year: 2024
Tax Description: See Documents Tab
Tax Annual Amount: 97

Utilities

Water front features: Ocean Front, Beach Front
Water front: 1

We can help!

Listing Contact

KELLY K SHAW PA

Listing agent KELLY K SHAW PA License #0583328

Listing office American Caribbean Real Estate, Christie's International Real Estate 81800 Overseas Highway PO Box 353, Islamorada, FL

Listing date Sep 3, 2025

MLS# 616391 Listing URL

Copyright © 2026 Florida Keys Board of REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

HighLights

Private 145.5‑acre island with over a mile of pristine white sandy beaches.
Tiff Deed ownership with no ROGO requirements for building a substantial structure on 12 upland acres.
Over 4 miles of mangrove shoreline teeming with wildlife.
Existing dock permit with lift, platform, and mooring slip.
Second dock permit pending for a 135 ft dock with a 40 ft platform and seven pilings to moor a vessel up to 100 ft.
Historically significant location ('The Tides at Main Key') used in marine weather forecasts.

Overview

Main Key is a 145.5-acre private island located in Barnes Sound, Monroe County, FL. The property features over a mile of pristine white sandy beaches along its east shoreline. The western and southern shorelines span over 4 miles and are characterized by mangroves reaching heights of 30 to 50 feet, creating a rookery abundant with gamefish, shellfish, sea mammals, and tropical birds. The property is conveyed via a TIFF Deed. The island includes 12 upland acres suitable for constructing a substantial structure without ROGO requirements. Historical records indicate that three large structures existed on the SE Government Lot area in the 1930s and 40s. A new dock permit is in place for the SE beach off the old homesite, including a lift, platform, and mooring slip. An additional permit is being applied for on the south side of Main Key for a 135 ft dock with a 40 ft platform and seven heavy pilings, designed to accommodate a large vessel up to 100 ft in length. A tide station was established by the USGS, later NOAA, in the 1930s. 'The Tides at Main Key' was a well-known reference point in Marine Weather forecasts on South Florida TV and NOAA Weather Radio for the Upper Keys and Florida Bay. The property is zoned OS - Offshore Island Dist.

Location Intelligence

Current Use by Public Records

Waterfront Land

Map

City: Key Largo
County: Monroe
State: Florida
Longitude: -80.3918
Latitude: 25.2553

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For sale
Waterfront Land
FL
Key Largo
33037
Main Key Barnes Sound

What type of property is this?

Waterfront Land - 145.5-acre private island with over a mile of beaches.

Where is this waterfront land located?

The property is located at Main Key Barnes Sound Key Largo, FL.

What is the asking price?

The asking price for this property is $4,395,000.

What are key features of this property?

This property features: Private 145.5‑acre island with over a mile of pristine white sandy beaches.; Tiff Deed ownership with no ROGO requirements for building a substantial structure on 12 upland acres.; Over 4 miles of mangrove shoreline teeming with wildlife.

Main Key Barnes Sound, Key Largo, FL 33037

LAND - Key Largo, FL

Property Features for Main Key Barnes Sound

General Information

Taxes and HOA fees

Utilities

We can help!

HighLights

Overview

Current Use by Public Records

Map

Nearby Similar for Sale

Prime US-1 Mixed-Use Opportunity

Key Largo Commercial Investment Opportunity

Oceanfront Compound with Concrete Dock

Key Largo Legal Duplex

Key Largo Commercial Property For Sale

Key Largo Commercial Property For Sale

Oceanfront Lot Ready to Build

Key Largo Mixed-Use Property

Key Largo Retail Investment Opportunity

Iconic Waterfront Restaurant and Bar

Dockominium in Ocean Reef Club

Key Largo Auto/Marine Repair Facility

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