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$1,700,000
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Property Description
Unapproved Short Sale for Non-Conforming 2 Bed/3 Bath Waterfront Home in Marathon. Large corner lot with 205 feet of water frontage. First floor has non-conforming addition of 2 bedrooms and living area. Second floor nicely updated with renovated kitchen, baths and impact windows throughout.
Full Property Details
Full Property Details for 10999 Ave 3rd Ave Gulf
General
- Price: $1,700,000
- Taxes: $10,682 (2025)
- Status: Active
- Type: Single Family
- Source: Regional
- MLS ID: F10543646
- Updated: 2/20/2026
- Added to Site: 63 day(s) ago
Interior
- Number of Rooms: 1
- Interior Features: Upper Level Primary
- Fireplace: Yes
- Appliances: Dishwasher, Electric Range, Gas Range, Oven, Refrigerator, Water Softener, Water Heater, Water Purifier, Washer
- Flooring: Laminate
Rooms
Bathrooms
- Total Bathrooms: 3
- Full Bathrooms: 3
- Main Floor Baths: 1
Bedrooms
- Total Bedrooms: 2
Additional Information
- Shared Amenities: None
- Pool: Yes
- Private Pool: Yes
- Pool Description: In Ground
Exterior
- Exterior Features: Balcony, Outdoor Living Area
- Porch/Patio/Deck: Open, Porch, Balcony
Parking
- Parking Features: Driveway
Location
- County: Monroe
- Subdivision: Key Colony Sub 4
- Direction Faces: Southwest
Community
- Community Name: 5940 - Other Florida County
Heating & Cooling
- Central air: Yes
- Air Conditioning: Yes
- Cooling Type: Central Air, Electric
- Heating Type: Central, Electric
Utilities
- Sewer: Public Sewer
- Water: Public
Structural Information
- Construction: Block
- Roof: Metal
- Windows: Impact Glass
- Entry Floor Number: 2
- Entry Location: Second Floor Entry
- Stories/Levels: 2
- Square Feet: 1,247
- Living Area: 1,247 Sq. Ft.
- Year Built: 1977
- Property Condition: Resale
Lot Features
- Property View: Canal
- Lot Features: Item14Acre
- Zoning: IS
Water Features
- Water Front: Yes
- Water View: Yes
- Water Front Desc.: Canal Front, No Fixed Bridges, Ocean Access
- Water Front View: Canal Front, No Fixed Bridges, Ocean Access
Financial Considerations
- Assessment Amount: $1,113,907
- Tax Amount: $10,682
- Tax Year: 2025
- Terms: Cash
Disclosures and Reports
- Special Conditions: Short Sale
- Documents Avail.: Short Sale Addendum
- Legal Description: BK 9 LT 1 KEY COLONY SUBD 4 PB4-23 KEY VACA OR431-100 OR679-699 OR1368-724 OR1485-1676 OR1549-1413Q/C OR2265-671 OR2295-533T/C OR2359-1411 O
- Property ID: 335550000000
Listed by Beckett Realty Advisors, LLC
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Schools
Schools serving 10999 Ave 3rd Ave Gulf
School District:Monroe County School District, Middle Torch Key, FL
| Name | Grades | Distance |
|---|---|---|
Stanley Switlik Elementary School 3400 Overseas Highway, Marathon, FL 33050 | PK-5 | 3.9 mi |
Marathon School 350 Sombrero Beach Road, Marathon, FL 33050 | 6-12 | 3.2 mi |
Disclaimer:
School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 10999 Ave 3rd Ave Gulf
Date
Details
Price
Change
Source
1/06/2026
Listed
$1,700,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 10999 Ave 3rd Ave Gulf
10999 Ave 3rd Avenue, Marathon, FL 33050 (MLS# F10543646) is a Single Family property with 2 bedrooms and 3 full bathrooms. 10999 Ave 3rd Avenue is currently listed for $1,700,000 and was received on January 01, 2026. Want to learn more about 10999 Ave 3rd Avenue? Do you have questions about finding other Single Family real estate for sale in Marathon? You can browse all Marathon real estate or contact a Coldwell Banker agent to request more information.

