668 & 670 89Th Street Ocean, Marathon, FL 33050 (MLS# 618025)

668 & 670 89Th Street Ocean, Marathon, FL 33050

$1,725,000

Property Type: Residential Bedrooms: 4 Baths: 4 Square Footage: 2,016 Lot Size (sq. ft.): 6,440 Status: Active

Current Price: $1,725,000 List Date: 1/10/2026 Last Modified: 4/27/2026

Overview

Description

Magnificent legal duplex in the vibrant heart of the Florida Keys, offering highly sought-after 7-day rental flexibility--an exceptional advantage for investors and homeowners alike. Elevated on stilts, this impressive property features two spacious bedrooms and two full bathrooms on each side, creating the perfect setup for extended families, dual living, or maximizing rental income. Ideally located just four properties from the Atlantic Ocean, the home boasts an expansive 70-foot seawall with quick, easy boating access to open water-making it a true boater's paradise. Both residences have been thoughtfully updated with modern finishes, enhancing comfort, style, and long-term value. Whether you're looking for a high-performing vacation rental, a primary residence with income potential, or a combination of both, this rare duplex offers unmatched versatility in one of the Florida Keys' most desirable locations.

Listing Details MLS# 618025

Location, Tax & Legal

Street #: 668 & 670
Street Name: 89Th Street Ocean
Key/Island: Marathon
State/Province: FL
Zip Code: 33050
County: Monroe
Subdivision: Gulfstream Shore (Marathon) (52.0)
Area: 16 - Sombrero Bch Rd to Vaca Cut - Oceanside
City: MARATHON
Off Shore Island: No
Mile Marker: 52
Marathon Neighborhood: Airport - Ocean (72nd to 106th)
Side: Ocean
Flood Zone: AE
Alternate Key #: 1427586
Handicap Access: No
Parcel #: 00349830-000000
Zoning: RM - Residential Medium
Deed Restrictions: No
Legal: Gulfstream Shores Of Marathon Fla Plat No 1 Key Vaca Pb3-89 N1/2 Lot 5 Blk 4
Taxes: 12919.92
Tax Year: 2025
Pub Sewer HkUp: Yes

Contract Information

Listing Board: Marathon/Lower Keys
As is Rght to Inspct: Yes
Species List: No

General Property Description

Realtor.COM Type: Multi-family
Style: Duplex
Waterfront: Yes
Control Depth: 5
Pool: No
Year Built: 1976
Total Units: 2
Lot SqFt: 6440
Lot Sqft Source: Property Data Card
Acres: 0.14
Living Apx SqFt: 2016
SqFt Source: Property Data Card
Total Bedrooms: 4
Full Baths: 4
Total Baths: 4
Rentals Allowed: Yes
Min Rental Days: 7

Association Info

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

Dockage

Seawall: Concrete

More Information

Building Style

Above Flood: Unknown

Remarks & Misc

Remarks – Consumer: Magnificent legal duplex in the vibrant heart of the Florida Keys, offering highly sought-after 7-day rental flexibility--an exceptional advantage for investors and homeowners alike. Elevated on stilts, this impressive property features two spacious bedrooms and two full bathrooms on each side, creating the perfect setup for extended families, dual living, or maximizing rental income. Ideally located just four properties from the Atlantic Ocean, the home boasts an expansive 70-foot seawall with quick, easy boating access to open water-making it a true boater's paradise. Both residences have been thoughtfully updated with modern finishes, enhancing comfort, style, and long-term value. Whether you're looking for a high-performing vacation rental, a primary residence with income potential, or a combination of both, this rare duplex offers unmatched versatility in one of the Florida Keys' most desirable locations.

Fee Includes

None: Yes

Tax Exemptions

None: Yes

Appliances

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

Pets

Pets Allowed: Yes

Cooling

Ceiling Fans(s): Yes
Central Air: Yes

Waterfront

Canal Front: Yes

Waterview

Canal View: Yes
Ocean View: Yes
Open Water View: Yes

Vehicle Storage

Covered Parking: Yes

Construction

CBS: Yes

Land Size

Less Than 1/4 Acre: Yes

Furnished

Negotiable: Yes

Utilities

Buyer to Verify: Yes
Cable Available: Yes
Elect Separate Meter: Yes
FKAA: Yes
Municipal Sewer: Yes
Water Separate Meter: Yes

Porch/Balcony

Open Porch/Balcony: Yes

Title

Negotiable: Yes

Property Features

Fee Includes: None Tax Exemptions: None Waterfront: Canal Front Waterview: Canal View; Ocean View; Open Water View Vehicle Storage: Covered Parking Furnished: Negotiable Cooling: Ceiling Fans(s); Central Air Utilities: Buyer to Verify; Cable Available; Elect Separate Meter; FKAA; Municipal Sewer; Water Separate Meter Appliances: Dishwasher; Dryer; Freezer; Microwave; Oven; Range; Refrigerator; Washer Construction: CBS Pets: Pets Allowed Land Size: Less Than 1/4 Acre Title: Negotiable

Listing Office: Lokation Real Estate

Last Updated: April - 27 - 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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