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Home > 103 52nd Street, Marathon, FL 33050 (MLS# 619765)
$2,200,000
103 52nd Street
Marathon, FL 33050
MLS# 619765
5 beds  |  4 baths  |  1924 sqft
 | 
Heated/chilled saltwater pool
  1 / 49  
Heated/chilled saltwater pool Canal front on two sides Aerial view of property Aerial view of patios and pool entertainment Wide and deep canal with immediate Ocean and Bay access Located at end of street, private and serene Tropical landscaping provides a private barrier from canal Canal runs out to Boot Key Harbor Private boat ramp shared with one neighbor Private end of road access to home and boat ramp Patio with outdoor dining for 8 off kitchen Kitchen with quartz countertops Kitchen view into dining and living rooms Sitting area and patio off living room Living room in large open floor plan Laundry in hall, one of 2 sets of washer/dryers Guest room 1 with patio access Guest room 1 Guest room 2 with patio access Guest room 2 Guest bathroom Primary bedroom with mini split AC for added cooling Primary bedroom with patio access Primary bedroom with patio access overlooking canal Primary bedroom with walk-in closet and ensuite bathroom Primary walk-in closet with locked owner's closet option Primary ensuite bathroom Double sink vanity in primary ensuite bathroom Downstairs guest bathroom Downstairs guest bathroom Guest bedroom 3 Downstairs guest suite Downstairs guest suite with private patio Two stall garage with ample storage space Two stall garage with 2nd washer/dryer Upstairs patio off primary bedroom overlooking canal Patio sitting area overlooking canal. Large shade umbrellas not shown Wide canal view Outdoor dining off kitchen View out of the front door Covered parking for vehicles, boat trailer or RV Outdoor convenience bath Tiki hut with outdoor shower and sitting area Tiki hut with outdoor shower and sitting area Sparkling pool, decked with lounge chairs Gated boat ramp 100 ft composite dock with jet ski lift, fish cleaning station, power and water Private landscaping give ultimate privacy without obscuring view 100 ft composite dock with jet ski lift, fish cleaning station, power and water

Property Description
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.

Details
Maps
Contract Information
Listing Board: Florida Keys
Current Price: $2,200,000
Listing Date: 2026-04-08
List Price: $2,200,000
Location, Tax & Legal
City: MARATHON
Mile Marker: 49
Marathon Neighborhood: Old Town East (25th to Sombrero)
Side: Ocean
Alternate Key #: 1399043
Parcel #: 00325100000000
Zoning: RH - Residential High
Deed Restrictions: Unknown
Legal: Bk H Lt 6 Amended Plat Of Marmeade Subd Pb3-185 Key Vacca Or495-1064 Or561-527 Or1091-2254 Or1193-2141/44 Or1368-1730D/C
Taxes: 10953.28
Tax Year: 2025
Pub Sewer HkUp: Yes
Street #: 103
Street Name: 52nd
Street Suffix: Street
Key/Island: Marathon
State/Province: FL
Zip Code: 33050
County: Monroe
Subdivision: Marameade Amd (49.5)
Area: 13 - 7 Mile Bridge to Sombrero Bch Rd E & W
General Property Description
Realtor.COM Type: Residential - Single Family
Waterfront: Yes
Control Depth: 6
Lot SqFt: 6955
Pool: Yes
Acres: 0.19
SqFt Source: Property Data Card
Rentals Allowed: With Restrictions
Min Rental Days: 7
Style: Single Family
Year Built: 2004
Living Apx SqFt: 1924
Total Bedrooms: 5
Full Baths: 3
Half Baths: 1
Total Baths: 4
Remarks & Misc
Remarks – Consumer: 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.
Directions: When heading south on US1, turn left onto 49th St. which is just south of the Cracked Conch Cafe. Take left on Ocean Terr, right on 52nd St. Home is last house on right.
Association Info
Mandatory Home Owners Asc: No
1st Right of Refusal: No
Association Fee $: 0
Fee Includes
None: 1
Dockage
Dock Length: 100
Dock: Composite
Boat Ramp: 1
Tax Exemptions
None: 1
Appliances
Dishwasher: 1
Disposal: 1
Dryer: 1
Freezer: 1
Microwave: 1
More Appliances: 1
Oven: 1
Range: 1
Refrigerator: 1
Stainless Steel Appliance(s): 1
Washer: 1
Pets
Pets Allowed: 1
Cooling
Ceiling Fans(s): 1
Central Air: 1
Wall/Window Unit(s): 1
Heating
Central: 1
Waterfront
Canal Front: 1
Waterview
Canal View: 1
Floor
Carpet: 1
Combo: 1
Tile: 1
Interior Features
Quartz Countertops: 1
Security System: 1
Smoke Alarms: 1
Storage: 1
Walk-in Closet(s): 1
Building Style
Above Flood: Yes
Stories: 2 Stories
Vehicle Storage
Carport: 1
Garage: 1
Construction
Combo Construction: 1
Land Size
Less Than 1/4 Acre: 1
Furnished
Furnished: 1
Terms
Cash: 1
Conventional: 1
FHA: 1
VA: 1
Utilities
FKAA: 1
Municipal Sewer: 1
Porch/Balcony
Open Porch/Balcony: 1
Exterior Features
Chickee Hut: 1
Fencing: 1
Fruit Tree(s): 1
Lighting: 1
Outdoor Shower: 1
Privacy Wall/Fence: 1
Storage: 1
Pool Info
In Ground: 1
Salt Water: 1
Heated: Yes
Concrete: 1
Decked: 1
Pre-Wired
Cable: 1
Roof
Shingle Roof: 1
Shutters
Accordion: 1
Status Change Info
Status: Active
Property Features
Fee Includes: None
Tax Exemptions: None
Waterfront: Canal Front
Waterview: Canal View
Dockage: Boat Ramp
Vehicle Storage: Garage; Carport
Furnished: Furnished
Cooling: Ceiling Fans(s); Central Air; Wall/Window Unit(s)
Heating: Central
Utilities: FKAA; Municipal Sewer
Interior Features: Quartz Countertops; Security System; Smoke Alarms; Storage; Walk-in Closet(s)
Pre-Wired: Cable
Appliances: Dishwasher; Disposal; Dryer; Freezer; Microwave; More Appliances; Oven; Range; Refrigerator; Stainless Steel Appliance(s); Washer
Exterior Features: Chickee Hut; Fencing; Fruit Tree(s); Lighting; Outdoor Shower; Privacy Wall/Fence; Storage
Pool Info: In Ground; Salt Water; Concrete; Decked
Construction: Combo Construction
Shutters: Accordion
Floor: Carpet; Combo; Tile
Roof: Shingle Roof
Pets: Pets Allowed
Land Size: Less Than 1/4 Acre
Terms: Cash; Conventional; FHA; VA
Listing Office: Ocean Sotheby's International Realty

Last Updated: May - 05 - 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.

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