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KAROL MARSDEN, PA          305-395-1975          karolrealtor@gmail.com

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815 39Th Street Gulf, Marathon, FL 33050

$2,490,000
Property Type: Residential Bedrooms: 4 Baths: 4 Square Footage: 2,805 Lot Size (sq. ft.): 4,696 Status: Active
Current Price: $2,490,000 List Date: 9/29/2026 Last Modified: 10/03/2026

Description

Welcome to Emerald Flats, an exclusive gated waterfront community in the heart of Marathon, where sophisticated coastal design and the Florida Keys lifestyle come together effortlessly. Designed & Built by D'Asign Source, this beautifully furnished 4-bedroom, 4-bath residence was completed in 2025 and offers 2,805 square feet of refined living space, thoughtfully designed for both relaxed everyday living and memorable entertaining. High ceilings, abundant natural light, impact-rated windows and doors, and a metal roof complement the home's fresh, modern construction. The interiors are light, airy, and beautifully curated in an elevated coastal palette. At the heart of the home, the designer kitchen pairs quartz countertops, KitchenAid stainless steel appliances, crisp white cabinetry, statement lighting, and an oversized waterfall-edge island with generous seating. A separate bar and entertaining area adds another layer of functionality, while the open-concept layout flows seamlessly into the dining and living spaces. Expansive glass doors invite the outdoors in and open to spacious covered balconies overlooking the Gulf, creating an exceptional setting for morning coffee, sunset cocktails, or simply enjoying the tropical surroundings. The bedrooms are equally inviting, with private balcony access in select rooms and beautifully appointed baths featuring quartz surfaces, glass-enclosed showers, and custom tile details. Boating is an effortless part of the lifestyle with Boat Slip #29 included, measuring approximately 45 feet long by 14.75 feet wide, providing convenient private docking just moments from home. Fully furnished and move-in ready, this exceptional Emerald Flats residence offers the perfect blend of luxury, waterfront living, modern comfort, and easy access to everything that makes Marathon so special. Bring your suitcases, your boat, and start living the Keys lifestyle from day one.

More Information MLS# 621438

Contract Information

Listing Board: Marathon/Lower Keys As is Rght to Inspct: Yes Potential Short Sale: No Bank Owned: No Species List: No Current Price: $2,490,000 Listing Date: 2026-09-29 List Price: $2,490,000

Location, Tax & Legal

City: MARATHON Off Shore Island: No Mile Marker: 49 Marathon Neighborhood: Old Town East (25th to Sombrero) Side: Bay/Gulf Flood Zone: AE-9 Alternate Key #: 9104903 Parcel #: 00337391-001500 Zoning: RH - Residential High Deed Restrictions: Unknown Legal: UNIT 15 EMERALD FLATS SUB PB2-21 PORTION OF BLOCK 5 RESUBDIVISION OF MARTHON BEACH Taxes: 1937.03 Tax Year: 2025 Pub Sewer HkUp: Yes Street #: 815 Street Name: 39Th Street Suffix: Street Gulf Key/Island: Marathon State/Province: FL Zip Code: 33050 County: Monroe Subdivision: Marathon Beach (49.0) Area: 13 - 7 Mile Bridge to Sombrero Bch Rd E & W

General Property Description

Realtor.COM Type: Residential - Single Family Waterfront: Yes Control Depth: 4 Lot Size: X Lot SqFt: 4696 Pool: Yes Lot Sqft Source: Property Data Card Acres: 0.11 SqFt Source: Property Data Card Rentals Allowed: Yes Min Rental Days: 7 Style: Single Family Year Built: 2025 Living Apx SqFt: 2805 Total Bedrooms: 4 Full Baths: 4 Total Baths: 4

Remarks & Misc

Remarks – Consumer: Welcome to Emerald Flats, an exclusive gated waterfront community in the heart of Marathon, where sophisticated coastal design and the Florida Keys lifestyle come together effortlessly. Designed & Built by D'Asign Source, this beautifully furnished 4-bedroom, 4-bath residence was completed in 2025 and offers 2,805 square feet of refined living space, thoughtfully designed for both relaxed everyday living and memorable entertaining. High ceilings, abundant natural light, impact-rated windows and doors, and a metal roof complement the home's fresh, modern construction. The interiors are light, airy, and beautifully curated in an elevated coastal palette. At the heart of the home, the designer kitchen pairs quartz countertops, KitchenAid stainless steel appliances, crisp white cabinetry, statement lighting, and an oversized waterfall-edge island with generous seating. A separate bar and entertaining area adds another layer of functionality, while the open-concept layout flows seamlessly into the dining and living spaces. Expansive glass doors invite the outdoors in and open to spacious covered balconies overlooking the Gulf, creating an exceptional setting for morning coffee, sunset cocktails, or simply enjoying the tropical surroundings. The bedrooms are equally inviting, with private balcony access in select rooms and beautifully appointed baths featuring quartz surfaces, glass-enclosed showers, and custom tile details. Boating is an effortless part of the lifestyle with Boat Slip #29 included, measuring approximately 45 feet long by 14.75 feet wide, providing convenient private docking just moments from home. Fully furnished and move-in ready, this exceptional Emerald Flats residence offers the perfect blend of luxury, waterfront living, modern comfort, and easy access to everything that makes Marathon so special. Bring your suitcases, your boat, and start living the Keys lifestyle from day one. Directions: US 1 to 39th st Gulf

Association Info

Mandatory Home Owners Asc: Yes 1st Right of Refusal: No Association Fee $: 550 Assoc/Mnt Fee Per: Monthly

Fee Includes

Common Area Mnt: 1

Dockage

Dock: Wood Boat Slip: 1

Tax Exemptions

None: 1

Appliances

Dishwasher: 1 Disposal: 1 Dryer: 1 Microwave: 1 Oven: 1 Range: 1 Refrigerator: 1 Stainless Steel Appliance(s): 1 Washer: 1

Pets

Pets Allowed: 1

Cooling

Ceiling Fans(s): 1 Central Air: 1

Waterfront

Open Water: 1

Waterview

Bay/Gulf View: 1 Open Water View: 1

Floor

Vinyl: 1

Neighborhood Feature

Airstrip: 1 Beach: 1 Bike Paths: 1

Interior Features

Bar: 1 Built-in Cabinets: 1 Drapes/Blinds Incl: 1 Entrance Foyer: 1 Pantry: 1 Quartz Countertops: 1 Smoke Alarms: 1 Walk-in Closet(s): 1

Property Condition

New Construction: 1

Specialty Rooms

Laundry Room: 1

Building Style

Above Flood: Yes Stories: 2 Stories

Windows/Doors

Impact Rstnce Window: 1

Vehicle Storage

Carport: 1 Off Street Parking: 1

Security

No Security: 1

Construction

CBS: 1

Land Size

Less Than 1/4 Acre: 1

Furnished

Furnished: 1

Utilities

Elect Separate Meter: 1 FKAA: 1 Municipal Sewer: 1 Water Separate Meter: 1

Porch/Balcony

Open Porch/Balcony: 1

Pool Info

In Ground: 1 Heated: Yes Concrete: 1

Pre-Wired

Cable: 1 Cat 5: 1

Roof

Metal Roof: 1

Financial Status

Auction: No Bank Owned: No Potential Short Sale: No Standard Sale: Yes

Status Change Info

Status: Active

Property Features

Fee Includes: Common Area Mnt Tax Exemptions: None Waterfront: Open Water Waterview: Bay/Gulf View; Open Water View Dockage: Boat Slip Property Condition: New Construction Vehicle Storage: Carport; Off Street Parking Furnished: Furnished Cooling: Ceiling Fans(s); Central Air Utilities: Elect Separate Meter; FKAA; Municipal Sewer; Water Separate Meter Interior Features: Bar; Built-in Cabinets; Drapes/Blinds Incl; Entrance Foyer; Pantry; Quartz Countertops; Smoke Alarms; Walk-in Closet(s) Pre-Wired: Cable; Cat 5 Specialty Rooms: Laundry Room Appliances: Dishwasher; Disposal; Dryer; Microwave; Oven; Range; Refrigerator; Stainless Steel Appliance(s); Washer Pool Info: In Ground; Concrete Construction: CBS Floor: Vinyl Roof: Metal Roof Pets: Pets Allowed Neighborhood Feature: Airstrip; Beach; Bike Paths Security: No Security Land Size: Less Than 1/4 Acre
Listing Office: Coldwell Banker Schmitt Real Estate Co.
Last Updated: October - 03 - 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.