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Dulce Monahan
REALTOR®, CRS, SRES
Cell: (386) 852-9420

143 Dorsett Drive, Marathon, FL 33050

$4,950,000
  • 143 Dorsett Drive, Marathon, FL 33050 Main Photo

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New to the Market Active
BEDS4 BATHS3 full SQUARE FEET2,121 MLS#621424
STATUSActive PROPERTY TYPEResidential - Single Family SUBDIVISIONDorsett Sub (590)

Property 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.

143 Dorsett Drive | MLS# 621424

This single family home located at 143 Dorsett Drive, Marathon, FL 33050 is currently listed for sale with an asking price of $4,950,000. This property was built in 2024 and has 4 bedrooms and 3 full baths with 2121 sq. ft. Dorsett Drive is located in the Dorsett Sub (590) subdivision. Search Dorsett Sub (590) real estate on dulcemonahan.adamscameron.com today.

Property Features

Property Type: Residential - Single Family
Cooling: Central Air, Ceiling Fans(s)
Lot Size: 0.66 Acres
Roof Type: Metal Roof
Taxes: $21,084
Year Built: 2024

Feature Descriptions

Appliances: Washer, Stainless Steel Appliance(s), Ice Machine, Freezer, Microwave, Oven, Range, Refrigerator, Dishwasher, Dryer
Building Above Flood: Yes
Days on Site: 4
Dockage: Boat Lift
Exterior: CBS
Exterior: Fencing, Storage, Shed, Outdoor Kitchen, Gazebo
Flooring: Tile
Furnished: Negotiable
HOA (1st Right of Refusal) Y/N: No
HOA (Mandatory) Y/N: No
Interior: Built-in Cabinets, Quartz Countertops, Walk-in Closet(s)
Key/Island: Marathon
Listing Board: Marathon/Lower Keys
Lot Dimensions: 0.66Acre(s)
Marathon Neighborhood: Grassy Key
Parcel #: 00376450000000
Parking: Open Parking, Trailer Storage, Covered Parking, RV Parking Open
Parking Space(s): 4+
Pets: Pets Allowed
Pool: In Ground, Concrete
Porch/Balcony: Open Porch/Balcony, Screened Patio
Property Condition: New Construction
Security: Patrolled Area
Sewer Hookup: Yes
Specialty Rooms: Laundry Room
Swimming Pool: Yes
Tax exemptions: None
Utilities: FKAA, Municipal Sewer
Waterfront: Bay Front, Open Water, Gulf Front
Waterview: Bay/Gulf View, Open Water View
Windows/Doors: French Doors, Impact Rstnce Window, Impact Rstnce Doors
Zoning: RM - Residential Medium

Listed By / Shown By

Listed By

Agency Name: Engel & Volkers Marathon
Agency Phone: (305) 587-3663

Shown By

Agent Name: Dulce Monahan
Agent Phone: Cell: (386) 852-9420
Agency Title: Adams Cameron & Co. REALTORS

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Estimated Payment

$ 29,546.73 per month $26,345.98 Principal & Interest $1,757.00 Property Tax $1,443.75 Homeowner's Insurance

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Disclaimer: All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information on this site was last updated 10/03/2026. The listing information on this page last changed on 10/03/2026. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of Delta Media Group MLS (last updated Sat 10/03/2026 12:01:50 AM EST) or Miami MLS (last updated Fri 10/02/2026 11:59:14 PM EST) or Stellar MLS (last updated Fri 10/02/2026 11:55:27 PM EST) or Daytona MLS (last updated Fri 10/02/2026 11:36:45 PM EST) or Tallahassee MLS (last updated Fri 10/02/2026 10:48:09 PM EST) or Northeast Florida MLS (last updated Fri 10/02/2026 11:58:52 PM EST) or My State MLS (last updated Fri 10/02/2026 11:30:13 PM EST) or Florida Keys MLS (last updated Fri 10/02/2026 8:32:40 PM EST). Real estate listings held by brokerage firms other than Adams Cameron & Co. REALTORS may be marked with the Internet Data Exchange logo and detailed information about those properties will include the name of the listing broker(s) when required by the MLS. All rights reserved.
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