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6403 Gulf Of Mexico Blvd # 403, Marathon FL 33050

Condo/Co-op For Sale
$995,000

BTC: 15.50095101

ETH: 564.39810771

14 days
Waterfront
3 bds
2 ba
1,902 sqft

Overview

Welcome to your Marathon lifestyle package, a fully remodeled 3-bedroom, 2-bath Penthouse offering 1,902 SQFT of luxury coastal living. Rare opportunity includes a 24' boat with marina access w/lifts permitted, combining a move-in-ready residence w/boating lifestyle buyers dream of in the Florida Keys. Designed for comfort and entertaining, this top-floor residence features Versace & marble tile finishes, quartz countertops, New Kitchen & Stainless Steel appliances, New impact windows, 9-ft ceilings, wet bar, private parking, open-concept layout, and wraparound balcony, perfect for tropical breezes, morning coffee, and sunset cocktails. Spacious Primary suite offers balcony access, dual closets & spa-inspired bath w/soaking tub, glass-enclosed shower, makeup station & designer finishes. Enjoy direct marina access & your included 24' boat for fishing, cruising, island hopping & waterfront dining in the Keys. Amenities include covered warehouse storage for your water toys, Lagoon-style pool, jacuzzi, tennis & basketball courts, fitness center, and gated tropical grounds. All located in the heart of Marathon, minutes from Sombrero Beach, Coco Plum Beach, Marathon Airport, Turtle Hospital, Old Seven Mile Bridge & Best waterfront restaurants! World-class boating, fishing, snorkeling & breathtaking sunsets are right outside your door. More than just a Penthouse, this is your private escape, boating base, weekend retreat, future vacation home, and private piece of paradise!

Location

Details

Type:
Residential
Parking:
2 Or More Spaces / Guest
Year Built:
1983
Lot:
No Data
Heating:
Central
Price/sqft:
$523
Cooling:
Central Air
HOA:
$5,978

Valuation

Our model vs. what's actually selling nearby.
Estimate
$995,000
$558K – $1.3M
Confidence Low
List vs. estimate
At estimate
List $995,000 · +0.0%
List is in line with recent comparable activity.
Price per sq ft
$523
-2.2% vs. city median $534
Based on
7 MLS comparables
Median of recent comparable listings. Sold comps use closing price, active listings use list price.

Highlights

Annual tax
$7,203
2026
HOA
$5,978/qtr
View
Ocean View, Direct Ocean
Waterfront
Ocean Access, Ocean Front
Pets
Allowed
All facts and features
  • Flooring

    • Tile

    Heating

    • Central

    Cooling

    • Central Air

    Appliances

    • Dishwasher

    • Dryer

    • Electric Range

    • Microwave

    • Refrigerator

    • Washer

    Other interior features

    • Volume Ceilings

    Bedrooms and bathrooms

    • Bedrooms: 3

    • Full bathrooms: 2

  • Parking

    • 2 Or More Spaces

    • Guest

    Property

    • Exterior Features: Other / Screened Balcony / Tennis Court(s)

    Other Property Information

    • Parcel Number: 00104133-003100

  • Type and style

    • Property Type: Residential

    • Property Sub Type: Condominium

  • Other financial information

    • HOA: $5,978

    • HOA Frequency: Quarterly

    • Annual tax amount: $7,203

  • Source details

    • MLS ID: A12033219

    Other facts

    • Construction Materials: Concrete Block Construction

    • Patio And Porch Features: Wrap Around

    • Window Features: Complete Impact Glass / Blinds / High Impact Windows

    • Waterfront: Yes

    • Living Area: 1902

    • Subdivision Name: SEAWATCH CONDOMINIUM

Private inquiry
Talk to the advisor on this listing.
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The multiple listing information is provided by the Miami Association of REALTORS® from a copyrighted compilation of listings. The compilation of listings and each individual listing are ©2026-present Miami Association of REALTORS®. All Rights Reserved. The information provided is for consumers' personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Listing courtesy of: Nations Best Realty, Inc.