317 Tropical Avenue, Marathon, FL

$1,100,000

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4

Beds

3

Baths

1,740

Square feet

7,405

Land Size

About 317 Tropical Avenue

Currently in Marathon, Duck Key & Key Colony there is no other New Construction Home available below $1.1M besides this Brand New Under Construction 4 Bed, 3 Bath, 1786 sqft living Concrete Above Flood Home, built by the local well-respected Design Center. It also happens to be located on a Corner Lot that backups to non-buildable protected land offering more privacy in the Grassy Key neighborhood, which has quickly become a highly desired area for many locals. It's a great family neighborhood with a community waterfront Sunset park and only a mile from a boat ramp. This home features poured solid concrete 16x16 columns plus an Energy Efficient Seamless Metal Roof, Hurricane Impact Windows & Doors, Spray Foam Insulation along with a High Efficiency 4 Ton A/C System, & even an Electrical Sub Panel Box prewired for a generator hook up. Pre-Cast Concrete Floors allowing for no center columns, which maximizes usable space in the 2 car garage. Step inside & find Maintenance Free Wide Plank Luxury Vinyl Flooring thru out the home, 8FT High Interior Doors, 9'6'' Ceilings, 5 ¼'' Baseboards, LED Recess Lighting, Modern Fans in each Bedroom & the Living Room, an Open Kitchen with Shaker Soft Close Wood Cabinets with Crown Molding & Hardware including 42'' Uppers, Quartz Countertops including a Large 1 level island, a Tile or Quartz Backsplash, Pendant Lighting, a Full Stainless Steel Appliance Package & Modern Single Sink & Faucet. All 3 bathrooms feature Designer Tiled Floors, Custom Tiled Showers including LED underlighting and lit shower nooks with the Primary & 1 Guest Bath having Frameless Glass Enclosures & the 2nd Guest having a Tub/Shower Combo. They all have Wood Vanities with Quartz Counters, Modern Vanity Lighting & Mirrors, Modern Faucets & Toilets. Home comes with a 1-year Builders Warranty and can be offered Furnished by a local interior designer for an additional cost making it Vacation Rental Ready. ETA for completion is Dec 2026.

Features of 317 Tropical Avenue

MLS® # 620206
Price $1,100,000
Bedrooms 4
Bathrooms 3.00
Full Baths 3
Square Footage 1,740
Land Size 7,405
Year Built 2026
Type Residential
Sub-Type Single Family Residence
Status Active Under Contract

Community Information

Address 317 Tropical Avenue
Area 19 - Crawl Key & Grassy Key
Subdivision Crains Sub (58.0)
City Marathon
County Monroe
State FL
Zip Code 33050

Amenities

Amenities Other Area Features
Utilities FKAA, Municipal Sewer
Parking Spaces 4
Parking Garage, Attached, Off Street Parking
View No Waterview
Is Waterfront No
Waterfront None
Has Pool No

Interior

Appliances Washer, Dryer, Dishwasher, Refrigerator, Range, Oven, Microwave, Disposal
Heating Central
Cooling Central Air, Ceiling Fans(s)
Fireplace No
Has Basement No

Exterior

Lot Description Less Than 1/4 Acre
Windows Impact Rstnce Window, Impact Rstnce Doors
Roof Metal Roof
Construction CBS, Concrete, Stucco

Additional Information

Date Listed June 1st, 2026
Days on Market 17
Zoning RM-1 - Residential Medium - 1
Short Sale No
RE / Bank Owned No

Listing Details

AgentKenny L. Matlock
OfficeNo Nonsense Real Estate Branch Office

Listing Map

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