9104 Aviation Boulevard, Marathon, FL 33050

$1,499,000

Property Type: Residential Bedrooms: 4 Baths: 4 Square Footage: 1,924 Lot Size (sq. ft.): 7,500 Status: Active

Current Price: $1,499,000 List Date: 10/16/2026 Last Modified: 10/19/2026

Overview

Description

CANALFRONT DUPLEX WITH EXCELLENT BOATING & INVESTMENT POTENTIAL! Discover a fantastic opportunity to own this canalfront duplex in the heart of Marathon, offering excellent boating access and the flexibility of weekly vacation rentals! Situated on a 7,500 sq. ft. lot along an approximately 50' wide, crystal-clear canal, this property features two spacious 2-bedroom, 2-bath residences totaling 1,924 sq. ft. Each unit offers an inviting open floor plan, laundry, a private screened porch overlooking the water perfect for enjoying the tropical breezes and downstairs storage. Boating enthusiasts will appreciate the concrete dockage, with room to accommodate boats up to 36' on each side. Solid CBS construction with impact windows and standing seam metal roof. With weekly rentals permitted, this property presents outstanding income-producing potential, whether you choose to rent both residences or enjoy one while generating income from the other. Conveniently located behind the Marathon Airp ... (Read more)

Listing Details MLS# 621663

Location, Tax & Legal

Street #: 9104
Street Name: Aviation
Street Suffix: Boulevard
Key/Island: Marathon
State/Province: FL
Zip Code: 33050
County: Monroe
Subdivision: Sea-Air Estates (52.0)
Area: 15 - Sombrero Bch Rd to Vaca Cut Gulfside
City: MARATHON
Mile Marker: 52
Marathon Neighborhood: Behind the Airport
Side: Bay/Gulf
Flood Zone: AE
Alternate Key #: 1405329
Parcel #: 00331061-000600
Zoning: RM - Residential Medium
Deed Restrictions: Unknown
Legal: BK 1 LT 6 SEA-AIR ESTATES VACA KEY PB6-91
Taxes: 9513.58
Tax Year: 2025
Pub Sewer HkUp: Yes

Contract Information

Listing Board: Key West Association
As is Rght to Inspct: Yes
Species List: No

General Property Description

Realtor.COM Type: Multi-family
Style: Duplex
Waterfront: Yes
Control Depth: 3
Pool: No
Year Built: 1978
Lot SqFt: 7500
Lot Sqft Source: Property Data Card
Acres: 0.17
Living Apx SqFt: 1924
SqFt Source: Property Data Card
Total Bedrooms: 4
Full Baths: 4
Total Baths: 4
Rentals Allowed: With Restrictions
Min Rental Days: 7
Total Units: 0

Association Info

Mandatory Home Owners Asc: No
1st Right of Refusal: No
Association Fee $: 0

Dockage

Dock Length: 75
Dock: Concrete

More Information

Building Style

Above Flood: Yes

Vehicle Storage

Car(s): 4+
Carport: Yes
Guest Parking: Yes
Open Parking: Yes
RV Parking Open: Yes
Trailer Storage: Yes

Remarks & Misc

Remarks – Consumer: CANALFRONT DUPLEX WITH EXCELLENT BOATING & INVESTMENT POTENTIAL! Discover a fantastic opportunity to own this canalfront duplex in the heart of Marathon, offering excellent boating access and the flexibility of weekly vacation rentals! Situated on a 7,500 sq. ft. lot along an approximately 50' wide, crystal-clear canal, this property features two spacious 2-bedroom, 2-bath residences totaling 1,924 sq. ft. Each unit offers an inviting open floor plan, laundry, a private screened porch overlooking the water perfect for enjoying the tropical breezes and downstairs storage. Boating enthusiasts will appreciate the concrete dockage, with room to accommodate boats up to 36' on each side. Solid CBS construction with impact windows and standing seam metal roof. With weekly rentals permitted, this property presents outstanding income-producing potential, whether you choose to rent both residences or enjoy one while generating income from the other. Conveniently located behind the Marathon Airport with the public boat ramp close by and just minutes from dining, shopping, beautiful Sombrero Beach, and all the attractions that make Marathon a premier Florida Keys destination. An exceptional opportunity to enjoy the Keys lifestyle while capitalizing on the area's strong vacation rental appeal!
Directions: From US-1 in Marathon, turn Gulfside onto Aviation Boulevard. Continue to 9104 Aviation Boulevard.

Fee Includes

None: Yes

Tax Exemptions

None: Yes

Appliances

Dishwasher: Yes
Dryer: Yes
Microwave: Yes
Oven: Yes
Refrigerator: Yes
Washer: Yes

Pets

Pets Allowed: Yes

Cooling

Central Air: Yes

Waterfront

Canal Front: Yes

Waterview

Canal View: Yes

Floor

Tile: Yes

Neighborhood Feature

Airstrip: Yes
Bike Paths: Yes
Community Boat Ramp: Yes

Interior Features

Built-in Cabinets: Yes
Drapes/Blinds Incl: Yes
Smoke Alarms: Yes
Storage: Yes

Specialty Rooms

Laundry Room: Yes
Utility Room: Yes

Windows/Doors

Impact Rstnce Window: Yes

Construction

CBS: Yes
Stucco: Yes

Land Size

Less Than 1/4 Acre: Yes

Furnished

Negotiable: Yes

Terms

Cash: Yes
Conventional: Yes
FHA: Yes
VA: Yes

Utilities

Buyer to Verify: Yes
FKAA: Yes
Municipal Sewer: Yes

Porch/Balcony

Screened P/B: Yes

Title

Negotiable: Yes

Exterior Features

Lighting: Yes
Privacy Wall/Fence: Yes
Shed: Yes
Storage: Yes

Roof

Metal Roof: Yes

Property Features

Fee Includes: None Tax Exemptions: None Waterfront: Canal Front Waterview: Canal View Vehicle Storage: Carport; Guest Parking; Open Parking; RV Parking Open; Trailer Storage Furnished: Negotiable Cooling: Central Air Utilities: Buyer to Verify; FKAA; Municipal Sewer Interior Features: Built-in Cabinets; Drapes/Blinds Incl; Smoke Alarms; Storage Specialty Rooms: Laundry Room; Utility Room Appliances: Dishwasher; Dryer; Microwave; Oven; Refrigerator; Washer Exterior Features: Lighting; Privacy Wall/Fence; Shed; Storage Construction: CBS; Stucco Floor: Tile Roof: Metal Roof Pets: Pets Allowed Neighborhood Feature: Airstrip; Bike Paths; Community Boat Ramp Land Size: Less Than 1/4 Acre Terms: Cash; Conventional; FHA; VA Title: Negotiable

Listing Office: Coldwell Banker Schmitt Real Estate Co

Last Updated: October - 19 - 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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