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5 Beds
4 Baths
1,924 sqft

$2,100,000

103 52nd Street, Marathon FL, 33050

Price per sqft$1,091.48
Built in2004
Property size1,924 sqft
Property typeResidential

Overview

Active

Listed Apr 8, 2026

Updated 25h ago

Welcome to Casa Sirena, a refined waterfront retreat in Marathon offering comfort, privacy, and strong investment appeal. This five bedroom, three bath home includes a convenient outdoor pool bath and is ideally positioned with water frontage on two sides. Boaters will appreciate 100 feet of durable composite dockage, a jet ski lift, and a private boat ramp shared with just one neighbor. The home enjoys close proximity to Boot Key Harbor, with easy access to waterfront dining by boat, as well as a straightforward route to the bayside via Knight Key Channel and immediate Ocean access. The surrounding Vaca Key and Boot Key provide a natural buffer, offering added protection from the elements. Outdoor living is central to the property, with lush tropical landscaping, a saltwater pool, tiki hut, and expansive wraparound patios accessible from all rooms. Inside, the open floor plan connects the living, dining, and kitchen areas, creating a comfortable and functional space. The kitchen is equipped with high end appliances suited for everyday use or hosting. Additional features include a spacious two car garage with ample storage, an extra washer and dryer, refrigerator, freezer, and workbench. The home is offered fully furnished and turnkey, ready for personal use or as a vacation rental. Privacy fencing, a security system, and gated dock and ramp access complete the offering.

$13,971/mo

Est. mortgage payment based on a $2,100,000 home price.

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

Additional information

MLS® ID
619765
Available since
April 8, 2026

Interior Features

Bedrooms
5
Bathrooms
4
Cooling
Yes
Heating
Yes
Basement
No

Exterior Features

Lot Size
0.19 Acres

 Courtesy of Lindsey Davis | Ocean Sotheby's International Realty

Based on information from DASH - Sotheby's International Realty (SIR) as of 10/10/2026. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. The display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent. 

©2026 DASH - Sotheby's International Realty (SIR). All rights reserved. 

Data last updated 7:15 AM UTC, 10/10/2026

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