Welcome to Casa Sirena, a refined waterfront retreat in Marathon offering comfort, privacy, and strong investment appeal. Seller Financing available! 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 Gulf 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.
For sale
Price cut: $100K (7/7)
$2,100,000
103 52nd St, Marathon, FL 33050
5beds
1,924sqft
Single Family Residence
Built in 2004
8,276 Square Feet Lot
$1,989,100 Zestimate®
$1,091/sqft
$-- HOA
What's special
Saltwater poolPrivacy fencingLush tropical landscapingExtra washer and dryerTiki hutJet ski liftConvenient outdoor pool bath
- 151 days
- 612
- 37
Zillow last checked:
Listing updated:
Listed by:
Lindsey N. Davis 305-395-2380,
Ocean Sotheby's International Realty
Source: FLKMLS,MLS#: 619765
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 5
- Bathrooms: 4
- Full bathrooms: 3
- 1/2 bathrooms: 1
Heating
- Has Heating (Unspecified Type)
Cooling
- Central Air, Wall/Window Unit(s), Ceiling Fans(s)
Appliances
- Included: More Appliances, Washer, Dryer, Dishwasher, Refrigerator, Range, Oven, Microwave, Disposal, Freezer, Stainless Steel Appliance(s)
Features
- Storage, Walk-in Closet(s), Quartz Countertops
- Flooring: Tile, Carpet, Combination
- Furnished: Yes
Interior area
- Total structure area: 1,924
- Total interior livable area: 1,924 sqft
Video & virtual tour
Property
Parking
- Parking features: Open, RV Carport, Storage
- Has garage: Yes
- Has carport: Yes
- Has uncovered spaces: Yes
Features
- Patio & porch: Open Porch/Balcony, Deck, Patio
- Exterior features: Chickee Hut, Fruit Tree(s), Lighting, Outdoor Shower, Storage
- Has private pool: Yes
- Pool features: In Ground, Salt Water, Concrete, Decked
- Fencing: Fenced,Privacy
- On waterfront: Yes
Lot
- Size: 8,276 Square Feet
Details
- Parcel number: 00325100000000
- Zoning: RH - Residential High
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Materials
- Combo Construction
Condition
- Year built: 2004
Community & HOA
Community
- Security: Security System
- Subdivision: Marameade Amd (49.5)
HOA
- Has HOA: No
- Services included: None
Location
- Region: Marathon
Financial & listing details
- Price per square foot: $1,091/sqft
- Tax assessed value: $1,214,395
- Annual tax amount: $10,953
- Date on market: 5/5/2026
- Listing terms: Seller Finance Psble,Cash,Conventional,FHA
Estimated market value
$1,989,100
$1.89M - $2.09M
$6,597/mo
Price history
| Date | Event | Price |
|---|---|---|
| 7/7/2026 | Price change | $2,100,000-4.5%$1,091/sqft |
Source: | ||
| 5/5/2026 | Listed for sale | $2,200,000+95.6%$1,143/sqft |
Source: | ||
| 3/14/2019 | Sold | $1,125,000+63.3%$585/sqft |
Source: | ||
| 12/14/2017 | Sold | $689,000+84%$358/sqft |
Source: | ||
| 8/24/2012 | Sold | $374,500-5.1%$195/sqft |
Source: | ||
| 6/1/2012 | Price change | $394,500$205/sqft |
Source: Homepath Report a problem | ||
| 5/23/2012 | Listed for sale | -- |
Source: Homepath Report a problem | ||
| 3/21/2012 | Listing removed | -- |
Source: Homepath Report a problem | ||
| 3/7/2012 | Listed for sale | -- |
Source: Homepath Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $10,953 -4.9% | $1,214,395 +0.1% |
| 2024 | $11,524 +3.9% | $1,213,545 +9% |
| 2023 | $11,095 +8% | $1,113,180 +10% |
| 2022 | $10,277 +6.7% | $1,011,982 +10% |
| 2021 | $9,632 +1.1% | $919,984 -0.5% |
| 2020 | $9,530 | $924,498 +14% |
| 2019 | $9,530 +25.9% | $810,836 +38.5% |
| 2018 | $7,572 +26% | $585,338 +0.1% |
| 2017 | $6,012 -1.8% | $585,027 +9.8% |
| 2016 | $6,124 +5.3% | $533,015 +20.6% |
| 2015 | $5,818 | $441,869 |
Find assessor info on the county website
Monthly payment
Est. payment





