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143 Dorsett Drive, Marathon, FL 33050

$4,950,000
Property Type: Residential Bedrooms: 4 Baths: 3 Square Footage: 2,121 Lot Size (sq. ft.): 26,499 Status: Active
Current Price: $4,950,000 List Date: 9/28/2026 Last Modified: 9/28/2026

Description

Introducing - Casa Del Mar Estate - this exceptional new home offers a rare level of privacy, scale, and waterfront living on an expansive 26,000+ square foot lot accessed by a private road. Designed to take full advantage of its spectacular setting, the property enjoys unobstructed ocean views and an effortless connection between the residence and the surrounding water. The main living quarters offer four bedrooms and three bathrooms, complemented by substantial finished storage space on the lower level. Built with quality and longevity in mind, the residence features impact-resistant windows and doors, a durable metal roof, concrete construction, and premium finishes throughout, offering the ideal combination of style, security, and peace of mind for waterfront living in the Florida Keys. Beyond the residence, the grounds have been thoughtfully designed for refined outdoor living and entertaining, with a resort-style pool positioned directly toward the ocean and a beautifully appointed gazebo creating the perfect setting for sunset gatherings and private celebrations. An outdoor kitchen, pool table, and table tennis area further extend the living space outdoors, creating an environment equally suited to relaxed afternoons with family or elegant entertaining with guests. The waterfront experience is equally impressive, with generous dockage and a new 20,000-pound boat lift, providing exceptional convenience for boating. Two substantial outdoor sheds offer additional storage for boat side essentials, tools, fishing equipment, and water toys, while the expansive grounds provide something rarely found in the Keys: meaningful room for future expansion. A generous portion of the property remains available for new owners to reimagine and potentially add a guest house, A rare combination of privacy, expansive oceanfront grounds, unobstructed views, exceptional boating amenities, and future expansion potential, offering the ultimate Florida Keys lifestyle.

More Information MLS# 621424

Contract Information

Current Price: $4,950,000 Listing Date: 2026-09-28 Listing Board: Marathon/Lower Keys List Price: $4,950,000

Location Tax Legal

Street #: 143 Street Name: Dorsett Street Suffix: Drive Key/Island: Marathon State/Province: FL Zip Code: 33050 County: Monroe Subdivision: Dorsett Sub (59.0) Area: 19 - Crawl Key & Grassy Key

General Property Description

Realtor.COM Type: Residential - Single Family Style: Single Family Waterfront: Yes Control Depth: 5 Pool: Yes Year Built: 2024 Lot Size: X Lot SqFt: 26498.56 Lot Sqft Source: Survey Acres: 0.66 Living Apx SqFt: 2121 SqFt Source: Property Data Card Total Bedrooms: 4 Full Baths: 3 Total Baths: 3 Rentals Allowed: Yes Min Rental Days: 7

Status Change Info

Status: Active

Association Info

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

Building Style

Above Flood: Yes

Vehicle Storage

Car(s): 4+

Property Features

Fee Includes: None Tax Exemptions: None Waterfront: Bay Front; Gulf Front; Open Water Waterview: Bay/Gulf View; Open Water View Dockage: Boat Lift Property Condition: New Construction Vehicle Storage: Covered Parking; Open Parking; RV Parking Open; Trailer Storage Furnished: Negotiable Cooling: Ceiling Fans(s); Central Air Utilities: FKAA; Municipal Sewer Interior Features: Built-in Cabinets; Quartz Countertops; Walk-in Closet(s) Specialty Rooms: Laundry Room Appliances: Dishwasher; Dryer; Freezer; Ice Machine; Microwave; Oven; Range; Refrigerator; Stainless Steel Appliance(s); Washer Exterior Features: Fencing; Gazebo; Outdoor Kitchen; Shed; Storage Pool Info: In Ground; Concrete Construction: CBS Floor: Tile Roof: Metal Roof Pets: Pets Allowed Security: Patrolled Area Land Size: 1/2 - Less Than 1 AC Terms: Cash; Conventional; VA
Listing Office: Engel & Völkers Marathon
Last Updated: September - 28 - 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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