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  • 143 Dorsett Drive, Marathon, FL 33050 (MLS# 621424)

143 Dorsett Drive, Marathon, FL 33050

New Listing
$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

Overview

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 appoint ...

Listing Details MLS# 621424

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
City
MARATHON
Mile Marker
59
Marathon Neighborhood
Grassy Key
Side
Bay/Gulf
Alternate Key #
1459526
Parcel #
00376450000000
Zoning
RM - Residential Medium
Deed Restrictions
Unknown
Legal
Lot 14 And Reserved Parcel / Amended Plat Of Dorsett Subd Pb2-153 Grassy Key Pt Of Gov Lot 1 Sec 19 Twp-65S Rge-34E Or75
Taxes
21084.91
Tax Year
2025
Pub Sewer HkUp
Yes

Contract Information

Listing Board
Marathon/Lower Keys

General Property Description

Realtor.COM Type
Residential - Single Family
Style
Single Family
Waterfront
Yes
Control Depth
5
Pool
Yes
Year Built
2024
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

Association Info

Mandatory Home Owners Asc
No
1st Right of Refusal
No
Association Fee $
0

Building Style

Above Flood
Yes

More Information

Vehicle Storage

Car(s)
4+
Covered Parking
Yes
Open Parking
Yes
RV Parking Open
Yes
Trailer Storage
Yes

Remarks & Misc

Remarks – Consumer
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.
Directions
Take US-1 to Dorsett Drive, turn North onto Dorsett, house at the very end on the right.

Fee Includes

None
Yes

Dockage

Boat Lift
Yes

Tax Exemptions

None
Yes

Appliances

Dishwasher
Yes
Dryer
Yes
Freezer
Yes
Ice Machine
Yes
Microwave
Yes
Oven
Yes
Range
Yes
Refrigerator
Yes
Stainless Steel Appliance(s)
Yes
Washer
Yes

Pets

Pets Allowed
Yes

Cooling

Ceiling Fans(s)
Yes
Central Air
Yes

Waterfront

Bay Front
Yes
Gulf Front
Yes
Open Water
Yes

Waterview

Bay/Gulf View
Yes
Open Water View
Yes

Floor

Tile
Yes

Interior Features

Built-in Cabinets
Yes
Quartz Countertops
Yes
Walk-in Closet(s)
Yes

Property Condition

New Construction
Yes

Specialty Rooms

Laundry Room
Yes

Windows/Doors

French Doors
Yes
Impact Rstnce Doors
Yes
Impact Rstnce Window
Yes

Security

Patrolled Area
Yes

Construction

CBS
Yes

Land Size

1/2 - Less Than 1 AC
Yes

Furnished

Negotiable
Yes

Terms

Cash
Yes
Conventional
Yes
VA
Yes

Utilities

FKAA
Yes
Municipal Sewer
Yes

Porch/Balcony

Open Porch/Balcony
Yes
Screened Patio
Yes

Exterior Features

Fencing
Yes
Gazebo
Yes
Outdoor Kitchen
Yes
Shed
Yes
Storage
Yes

Pool Info

In Ground
Yes
Concrete
Yes

Roof

Metal Roof
Yes

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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