Realmo

Buy
- For Sale
- Post a Listing
Property Types
- Retail
- Office
  
  Live - Work Space
- Residential Income
  
  Multifamily
  
  Duplex
  
  Short Term Rental
- Restaurants
- Industrial
- Mixed-Use
- Hospitality
  
  Hotel
  
  Resort
- Land
  
  Residential
  
  Commercial
  
  Waterfront
- Specialty
  
  Marina
Rent
- For Lease
- Post a Listing
Space Uses
- Office
Analytics
- Analytics Center
- Property Lookup
- Property Insight
- Recently Sold
- Value Estimation
- Cap Rate
- Ownership Records
- Location Intelligence
- Business Placement
- Off-Market Leads
- Zoning Insight

Add Listing Sign In

For Sale
- Retail
- Office
  - Live - Work Space
- Residential Income
- Restaurants
- Industrial
- Mixed-Use
- Hospitality
  - Hotel
  - Resort
- Land
  - Residential
  - Commercial
  - Waterfront
- Specialty
  - Marina
For Lease
- Office
Analytics Center
Property Lookup
Property Insight
Recently Sold
Value Estimation
Cap Rate
Ownership Records
Location Intelligence
Business Placement
Off-Market Leads
Zoning Insight
Add Listing
Find Brokers

Marathon, FL Duplexes for Sale

List

Map

Key Colony Beach, FL Duck Key, FL Conch Key, FL

7 results

Sort:

Marathon Duplex with Redevelopment Potential

$650,000

1,040 SF

Marathon Duplex with Redevelopment Potential

746 50th Street Gulf, Marathon, FL 33050

Duplex in Marathon, Florida Keys, with redevelopment potential.

Rare redevelopment opportunity in the heart of Marathon.
Includes permitted plans for a new 4‑bedroom, 3.5‑bathroom residence (2400 sqft), streamlining redevelopment.
Features an extra Transferable Building Right (TBR), offering valuable construction flexibility.
Prime location in a sought‑after area of Marathon, Florida Keys.
Offers immediate rental income potential with two existing 1‑bedroom, 1‑bath units.

Updated: May 4

View details

Marathon Duplex Redevelopment Opportunity

$650,000

1,460 SF

Marathon Duplex Redevelopment Opportunity

746 50th St Gulf, Marathon, FL 33050

Duplex in Marathon, Florida Keys, with redevelopment potential.

Rare redevelopment opportunity in the heart of Marathon, Florida Keys.
Desirable lot location.
Duplex property with two separate units.
Each unit features 1‑bedroom and 1‑bath.
Includes a garage.

Updated: Mar 29

View details

$675,000

1,302 SF

Two-Story Duplex in Marathon

Two-story duplex on a large lot in Marathon, Florida.

329 63 Court Gulf, Marathon, FL 33050

View details

Multifamily Complex in Marathon, Florida

$1,800,000

3,017 SF

Multifamily Complex in Marathon, Florida

Multifamily complex with redevelopment potential in a high-demand location.

13755 Overseas Highway, Marathon, FL 33050

View details

$1,300,000

1,668 SF

Waterfront Duplex in Sombrero Beach

Updated waterfront duplex with dock and ocean access in Marathon.

17-18 Man-O-War Drive, Marathon, FL 33050

View details

$690,000

834 SF

Waterfront Duplex Near Sombrero Beach

Updated waterfront duplex, move-in ready, near Sombrero Beach.

18 Man-O-War Drive, Marathon, FL 33050

View details

$1,099,000

1,512 SF

Waterfront Duplex with Building Rights

Rare duplex on canal with open water access in Marathon.

4901/4903 49th Street, Marathon, FL 33050

View details

Based on your search, we've compiled 11 Potential Opportunities for your consideration. Besides 7 Active listings in Marathon, FL, we suggest exploring several alternatives: 4 properties in Nearby Cities

Opportunities in Nearby Cities

Here are 4 Similar properties we found in Nearby Locations for your consideration.

$1,875,000

2,423 SF

Key West Duplex with Pool

Spacious duplex with pool, ideal for various living arrangements.

1516 17th Terrace, Key West, FL 33040

View details

$799,000

1,496 SF

Key Largo Legal Duplex

Updated duplex near Harry Harris Park, generating $5350 monthly.

102 Harry Harris Drive, Key Largo, FL 33070

View details

Key West Duplex Redevelopment Opportunity

$825,000

1,464 SF

Key West Duplex Redevelopment Opportunity

Legal duplex in prime location with redevelopment potential and owner financing.

3711 Eagle Avenue, Key West, FL 33040

View details

$785,000

1,824 SF

Key Largo Income Property

Income-generating duplex in Key Largo with long-term tenants.

125 127 Casa Court Drive, Key Largo, FL 33070

View details

Marathon, FL Duplexes Investment Opportunities Market Analysis

Explore 7 duplexes for sale in Marathon, FL, showcased through 7 active listings on our real estate platform. These investment opportunities span a total of 10,833 square feet of properties for sale, with an estimated market value of $6,864,000.

Sale prices for duplexes in Marathon, FL start at $650,000, averaging $980,571, and reaching up to $1,800,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

List

Map

Top Commercial Asset Segments

Demographics Overview

Population 11K

Population Growth (5Y) +12.2%

Median Household Income $83,776

College Educated 36.9%

High-Yield Neighborhoods for Strategic Investment

Identify Marathon submarkets with the highest inventory density on the market and evaluate the median listing prices of real estate assets

Neighborhood	Average Price
33050	$1M

Taxes & Financing

Tax Rate (average for all types) 0.86%

Property Tax per SF $8.45 per sq ft

Tax Rate vs County Average 0.11 pp above county avg

Average Loan-to-Value 65.0%

Need Help?

Reach out if you need assistance with Realmo tools or have questions about your listings

Marathon, FL Duplexes for Sale

Marathon Duplex with Redevelopment Potential

Duplex in Marathon, Florida Keys, with redevelopment potential.