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4 Beds
4 Baths
2,016 sqft

$1,725,000

668 & 670 89Th Street Ocean, Marathon FL, 33050

Price per sqft$855.65
Built in1976
Property size2,016 sqft
Property typeMulti-family

Overview

Active

Listed Jan 9, 2026

Updated Apr 9

Magnificent legal duplex in the vibrant heart of the Florida Keys, offering highly sought-after 7-day rental flexibility--an exceptional advantage for investors and homeowners alike. Elevated on stilts, this impressive property features two spacious bedrooms and two full bathrooms on each side, creating the perfect setup for extended families, dual living, or maximizing rental income. Ideally located just four properties from the Atlantic Ocean, the home boasts an expansive 70-foot seawall with quick, easy boating access to open water-making it a true boater's paradise. Both residences have been thoughtfully updated with modern finishes, enhancing comfort, style, and long-term value.Whether you're looking for a high-performing vacation rental, a primary residence with income potential, or a combination of both, this rare duplex offers unmatched versatility in one of the Florida Keys' most desirable locations.

$11,476/mo

Est. mortgage payment based on a $1,725,000 home price.

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

Additional information

MLS® ID
618025

Interior Features

Bedrooms
4
Bathrooms
4
Cooling
Yes
Basement
No

Exterior Features

Lot Size
0.15 Acres

Other Property Details

Taxes
$12,920
Tax Frequency
Annually
View
Yes
Waterfront
Yes
MLS provider logo

Listed by Frank Griffiths with Lokation Real Estate
Listing Contact:  

The IDX display contains information sourced from the Florida Keys Board of REALTORS® as of 4/9/2026. This data is intended solely for personal, non-commercial use and is not to be utilized for any other purposes except to identify potential properties for purchase. Although the MLS data displayed is typically considered reliable, it is not guaranteed to be accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and are advised to conduct their own investigations or seek professional assistance. Other sources besides the Listing Agent may have contributed to the MLS data presented. Unless expressly specified in writing, the Broker/Agent has not confirmed any information obtained from external sources. The Broker/Agent may or may not have acted as the Listing and/or Selling Agent and cannot guarantee the accuracy of property locations displayed on any map. Any compensation offers are solely made to participants of the MLS where the listing is registered.

©2026 Florida Keys Board of REALTORS® all rights reserved.

Data last updated on 4/9/2026 at 9:15 AM UTC

 

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