815 39Th Street Gulf, Marathon, FL 33050

New Listing

$2,490,000

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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: 9/29/2026

Overview

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. Built in 2025, this beautifully furnished 4-bedroom, 4-bath residence 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. Expansi ... (Read more)

Listing Details MLS# 621438

Location, Tax & Legal

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
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

Contract Information

Listing Board: Marathon/Lower Keys
As is Rght to Inspct: Yes
Potential Short Sale: No
Bank Owned: No
Species List: No

General Property Description

Realtor.COM Type: Residential - Single Family
Style: Single Family
Waterfront: Yes
Control Depth: 4
Pool: Yes
Year Built: 2025
Lot SqFt: 4696
Lot Sqft Source: Property Data Card
Acres: 0.11
Living Apx SqFt: 2805
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: Yes
1st Right of Refusal: No
Association Fee $: 550
Assoc/Mnt Fee Per: Monthly

Dockage

Dock: Wood
Boat Slip: Yes

More Information

Building Style

Above Flood: Yes
Stories: 2 Stories

Pool Info

Heated: Yes
In Ground: Yes
Concrete: Yes

Financial Status

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

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. Built in 2025, this beautifully furnished 4-bedroom, 4-bath residence 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

Fee Includes

Common Area Mnt: Yes

Tax Exemptions

None: Yes

Appliances

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

Pets

Pets Allowed: Yes

Cooling

Ceiling Fans(s): Yes
Central Air: Yes

Waterfront

Open Water: Yes

Waterview

Bay/Gulf View: Yes
Open Water View: Yes

Floor

Vinyl: Yes

Neighborhood Feature

Airstrip: Yes
Beach: Yes
Bike Paths: Yes

Interior Features

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

Property Condition

New Construction: Yes

Specialty Rooms

Laundry Room: Yes

Windows/Doors

Impact Rstnce Window: Yes

Vehicle Storage

Carport: Yes
Off Street Parking: Yes

Security

No Security: Yes

Construction

CBS: Yes

Land Size

Less Than 1/4 Acre: Yes

Furnished

Furnished: Yes

Utilities

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

Porch/Balcony

Open Porch/Balcony: Yes

Pre-Wired

Cable: Yes
Cat 5: Yes

Roof

Metal Roof: Yes

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: September - 29 - 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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