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$1,595,000 Contingent

  • For Sale
  • Contingent
  • Condo
  • 2 Beds
  • 2 Full Baths
  • 2,004 Sq. Ft.
  • Updated 2 days ago
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Welcome to 8403 Gulf of Mexico Blvd Marathon, Florida in exclusive Seawatch Condominiums. This one-of-a-kind, customized penthouse condo boasts only the best views and comes with a 40' boat slip equipped with a 30k lb. lift. This residence was renovated down to the concrete, offering unparalleled luxury and sophistication. Just stepping into the unit you will be captivated as the expansive windows bring sweeping views of both the Atlantic and the Gulf into the space. Custom touches to the living space include: custom wood paneling lining the open living space, a unique wood paneled office/lounge, hard wired Lutron blinds, custom cherry cabinetry, top-of-the-line stainless steel appliances, Sonos speakers throughout, river reclaimed Dade county pine flooring throughout, impeccable stone work in the bathrooms and all within an spacious open floor style living area. Seawatch offers an array of amenities such as: securely gated entrance, a fully-equipped gym, a large on-site storage barn, ample space to store your boat and RV, newly renovated resort sized pool, spa and cabana, club house, tennis and pickle ball courts, lush tropical landscaping and gardens and marina offering protective dockage.

Full Property Details for 8403 Gulf of Mexico Blvd # 403

General

  • Price: $1,595,000
  • HOA FEE: $2,155/month
  • HOA FEE FREQ.: Quarterly
  • Taxes: $8,493 (2025)
  • Status: Contingent
  • Type: Condo
  • Source: 927
  • MLS ID: 619154
  • Updated: 6/30/2026
  • Added to Site: 106 day(s) ago

Interior

  • Interior Features: Walk-in Closet(s), Built-in Cabinets, Drapes/Blinds Incl, Elevator, Quartz Countertops, Split Bedroom, Storage, Window Treatments
  • Appliances: Stainless Steel Appliance(s), Dishwasher, Dryer, Microwave, Oven, Range, Refrigerator, Washer, Wine Cooler
  • Flooring: Wood, Marble

Rooms

Bathrooms

  • Total Bathrooms: 2
  • Full Bathrooms: 2

Bedrooms

  • Total Bedrooms: 2

Additional Information

  • Shared Amenities: Manager on Premises, Clubhouse, Tennis Court(s), Pool
  • Pool: Yes
  • Pool Description: Concrete, Heated, In Ground
  • Security/Safety: Electric Gate, Secured Building

Exterior

  • Exterior Features: Tennis Court(s), Bar, Fencing, Storage
  • Deck/Patio: No Porch/Balcony
  • Porch/Patio/Deck: No Porch/Balcony

Parking

  • Parking Features: Guest, Covered

Location

  • Area: 16 - Sombrero Bch Rd to Vaca Cut - Oceanside
  • County: Monroe
  • Subdivision: Seawatch (53.5)
  • Driving Directions: Turn on to 117th Street by he Aquarium Slight right hand turn to Gulf of Mexico Blvd. Follow signs to Building 8. If you don't have a code for the gate, we will have to meet you to get you in.

Community

  • Association: Yes
  • Assoc. Fees Include: Bldg Exterior Mnt, Building Insurance, Common Area Mnt, Exterminating, Security
  • Pets Allowed: Yes

Heating & Cooling

  • Central air: Yes
  • Air Conditioning: Yes
  • Cooling Type: Central Air, Ceiling Fans(s)
  • Heating Type: Central

Structural Information

  • Architectural Style: Above Flood
  • Construction Status: Updated/Remodeled
  • Construction: CBS
  • Roof: Concrete
  • Windows/Doors: Impact Rstnce Window
  • Square Feet: 2,004
  • Sq. Ft. Source: Property Data Card
  • Year Built: 1983
  • Property Condition: Updated/Remodeled

Unit Information

  • Units in Building: 48
  • Unit Type: Unit

Lot Features

  • Property View: Open Water View, Ocean, Bay
  • Lot Size Source: Property Data Card
  • Zoning: RM - Residential Medium

Water Features

  • Water Front: Yes
  • Water View: Yes
  • Water Front Desc.: Bay Front, Gulf Front, Open Water

Financial Considerations

  • Association Fee: Yes
  • Association Fee: $6,464
  • Assoc Fee Freq.: Quarterly
  • Tax Amount: $8,493.22
  • Tax Year: 2025
  • Terms: Cash, Conventional

Disclosures and Reports

  • Legal Description: Unit 403 Seawatch At Marathon-Phase I A Condominium Bldg 8 Or851-1004/05 Or1005-1675C/T Or1173-2137 Or1239-719 Or1644-73
  • APN: 104131003100

Listed by Berkshire Hathaway HomeServices Keys Real Estate, The Owen Lucas Team (305) 393-0559

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Listing agent

— 8403 Gulf of Mexico Blvd # 403 —

  • The Owen Lucas Team

    Berkshire Hathaway HomeServices Keys Real Estate

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 8403 Gulf of Mexico Blvd # 403

School District:Monroe County School District, Middle Torch Key, FL
NameGradesDistance
Stanley Switlik Elementary School
3400 Overseas Highway, Marathon, FL 33050
PK-54.3 mi
Marathon School
350 Sombrero Beach Road, Marathon, FL 33050
6-123.6 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 8403 Gulf of Mexico Blvd # 403 Get Price Alerts and Save Property

Date
Details
Price
Change
Source
3/18/2026
Listed
$1,595,000
27.6%
MLS
8/23/2024
Sold
$1,250,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 8403 Gulf of Mexico Blvd # 403

Year
Property Taxes
Change
Tax Assessment
Change
2025
$8,493
275%
$923,108
319%
2024
$2,264
5%
$220,370
3%
2023
$2,162
2%
$213,952
6%
2021
$2,115
—
$201,671
-3%
2022
$2,121
-9%
$207,721
-8%
2019
$2,325
3%
$226,349
—
2018
$2,254
-16%
$226,349
-17%
2017
$2,699
-3%
$274,014
—
2016
$2,772
—
$274,014
—
2015
$2,782
-22%
$274,014
-10%
2014
$3,553
3%
$304,460
5%
2013
$3,433
—
$289,962
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 8403 Gulf of Mexico Blvd # 403

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*These costs are estimates, and the interest rates assume exceptional credit standing.

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

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Listed by Berkshire Hathaway HomeServices Keys Real Estate, The Owen Lucas Team (305) 393-0559

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8403 Gulf Of Mexico Boulevard # 403, Marathon, FL 33050 (MLS# 619154) is a Condo property with 2 bedrooms and 2 full bathrooms. 8403 Gulf Of Mexico Boulevard # 403 is currently listed for $1,595,000 and was received on March 18, 2026. Want to learn more about 8403 Gulf Of Mexico Boulevard # 403? Do you have questions about finding other Condo real estate for sale in Marathon? You can browse all Marathon real estate or contact a Coldwell Banker agent to request more information.

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