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1903 Sombrero Boulevard, Marathon, FL 33050

New Listing
$4,499,000
Property Type: Residential Bedrooms: 5 Baths: 5 Square Footage: 4,836 Lot Size (sq. ft.): 18,349 Status: Active
Current Price: $4,499,000 List Date: 10/16/2026 Last Modified: 10/16/2026

Description

Located right on coveted Sister Creek discover exceptional waterfront living in this expansive Marathon estate overlooking the golf course and a deep-water canal with deep water access to both the Atlantic Ocean and Gulf. Offering 4,836 sq. ft. of combined living space, the property features a 4-bedroom, 3.5-bath Main Residence and detached 1-bedroom, 1-bath Guest Suite. A grand entry welcomes you with soaring ceilings and a sweeping curved wood staircase, while elegant travertine flooring flows throughout the main living areas. The spacious Living Area showcases private water views, a fireplace, wet bar and multiple glass doors opening to the pool deck. The well-appointed Kitchen features granite countertops, custom cabinetry, GE Monogram range and breakfast bar overlooking the Dining Area. The main-level Primary Suite offers long water views, a generous walk-in closet and luxurious Bath with soaking tub, dual vanities and steam shower. Upstairs, two ensuite Guest Bedrooms enjoy water views, while a versatile fourth Bedroom opens to a private balcony overlooking the golf course. Designed for effortless indoor-outdoor entertaining, the expansive waterfront patio features a covered outdoor Kitchen, heated pool and raised spillover spa surrounded by tropical landscaping. Boating enthusiasts will appreciate an 89' dock, additional 10' x 14' floating platform, 20,000 lb. boat lift and angler's prep station. The detached Guest Suite offers private accommodations with a sitting area, wet bar and full Bath. Additional highlights include impact windows and doors, 2-car garage, dual laundry areas and irrigation system. A rare opportunity to enjoy spacious waterfront living, exceptional boating access and golf course views in the heart of the Florida Keys.

More Information MLS# 621660

Contract Information

Current Price: $4,499,000 Listing Date: 2026-10-16 Listing Board: Key West Association List Price: $4,499,000 As is Rght to Inspct: Yes Species List: No

Location Tax Legal

Street #: 1903 Street Name: Sombrero Street Suffix: Boulevard Key/Island: Marathon State/Province: FL Zip Code: 33050 County: Monroe Subdivision: Sombrero Properties (49.5) Area: 14 - Sombrero Area

General Property Description

Realtor.COM Type: Residential - Single Family Style: Single Family Waterfront: Yes Control Depth: 6 Pool: Yes Year Built: 2007 Lot SqFt: 18349 Lot Sqft Source: Property Data Card Acres: 0.42 Living Apx SqFt: 4836 SqFt Source: Property Data Card Total Bedrooms: 5 Full Baths: 4 Half Baths: 1 Total Baths: 5 Rentals Allowed: With Restrictions Min Rental Days: 7

Status Change Info

Status: Active

Association Info

Mandatory Home Owners Asc: No 1st Right of Refusal: No

Dockage

Dock: Composite Seawall: Rip Rap

Building Style

Above Flood: Yes

Specialty Rooms

Guest/Servant Qtrs: Legal

Pool Info

Heated: Yes

Property Features

Fee Includes: None Tax Exemptions: None Waterfront: Canal Front Waterview: Canal View Dockage: Boat Lift Vehicle Storage: Garage; Attached; Auto Door Opener; Off Street Parking; Open Parking; Trailer Storage Furnished: Negotiable Cooling: Ceiling Fans(s); Central Air; Ductless Utilities: Buyer to Verify; Cable Available; FKAA; Municipal Sewer Interior Features: Bar; Built-in Cabinets; Cathedral Ceilings; Entrance Foyer; Fireplace(s); Granite Counter Top; Smoke Alarms; Split Bedroom; Storage; Tray Ceilings; Walk-in Closet(s); Wet Bar; Whirlpool Bath Tub; Window Treatments Specialty Rooms: Laundry Room; Sun/Florida Room; Utility Room Appliances: Dishwasher; Disposal; Dryer; Gas Appliances; Ice Machine; Microwave; Oven; Range; Refrigerator; Stainless Steel Appliance(s); Washer; Wine Cooler Exterior Features: Built-in Grill; Detached Guest Qtrs; Fencing; Fruit Tree(s); Hot Tub; Lighting; Outdoor Kitchen; Privacy Wall/Fence; Rain Gutters; Sprinkler System; Storage Pool Info: In Ground; Concrete; Decked Construction: CBS Floor: Marble Roof: Tile Roof Pets: Pets Allowed Neighborhood Feature: Beach; Other Area Features Land Size: 1/4 - 1/2 Acre Terms: Cash; Conventional Title: Negotiable
Listing Office: Coldwell Banker Schmitt Real Estate Co
Last Updated: October - 16 - 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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