57783 Morton St
Grassy Key, FL 33050
10 Beds
12 Baths
10,000 sqft (on 3.07 acres)
10 Beds
12 Baths
10,000 sqft
(on 3.07 acres)
We estimate this home will sell faster than 85% nearby.
Local Information
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Description
Newly Built Gulf-front Sanctuary with Panoramic Views, Guest and Pool Houses, Luxe Outdoor Living, and a Deepwater Navigable Dock.Set on 3 secluded acres+/- along one of the most protected stretches of the Gulf of America, 57783 Morton Street is a newly completed estate of rare scale, privacy, and modern coastal design. Surrounded by water, sandscape, and tidal ponds alive with marine life, the property offers more than 200'+/- of direct water frontage and uninterrupted views across the open Gulf.Completed in 2025 by builder and developer Alderuccio Corporation, this resilient, elevated retreat is constructed entirely of concrete and impact glass and is designed for effortless indoor-outdoor living. With three distinct finished living spaces totaling approximately 10,000 SF+/-, the estate functions as a private resort offering privacy, recreation, and exceptional access to the best of the Florida Keys.Though private and serene, the estate remains close to everything that defines Keys living. Dining, marinas, and shopping are less than ten minutes away, and the Florida Keys Marathon International Airport lies 4 miles+/- from the property for seamless private aviation access. Deepwater routes, snorkeling coves, and renowned fishing grounds are just moments from the protected 100' dock.The architecture emphasizes clarity, durability, and immersion in water and light. Walls of impact glass capture views of the Gulf, the bay, and the property's own tidal ponds, allowing natural light to animate the interiors throughout the day. Generous room proportions, ceiling heights of 10' to 12', and open circulation reinforce a sense of airiness and connection.Every finish, from porcelain flooring to quartzite counters and exterior of shell-stone, was selected for both resilience and refined coastal style. Smart home systems, solar power with battery backup, and integrated storm protection underscore a commitment to performance and longevity.
We estimate this home will sell faster than 85% nearby.
Home Highlights
Parking
Garage
Outdoor
Porch, Patio, Deck, Pool
View
Bay/Gulf View
HOA
None
Price/Sqft
$2,950
Listed
26 days ago
Home Details for 57783 Morton St
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Beds & Baths Number of Bedrooms: 10Number of Bathrooms: 13Number of Bathrooms (full): 11Number of Bathrooms (half): 2 |
Dimensions and Layout Living Area: 10000 Square Feet |
Appliances & Utilities Appliances: Washer, Stainless Steel Appliance(s), Ice Machine, Freezer, Microwave, Oven, Refrigerator, Dryer, Other AppliancesDryerLaundry: Laundry RoomMicrowaveRefrigeratorWasher |
Heating & Cooling Heating: Central,Solar,ElectricHas CoolingAir Conditioning: Central Air,Ceiling Fans(s)Has HeatingHeating Fuel: Central |
Fireplace & Spa Has a Fireplace |
Windows, Doors, Floors & Walls Door: Impact Rstnce Doors |
Levels, Entrance, & Accessibility Stories: 2Levels: TwoElevator |
View Has a ViewView: Bay/Gulf View |
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Exterior Home Features Patio / Porch: Open Porch/Balcony, Deck, Screened Patio, PatioOther Structures: Detached Guest QtrsExterior: Built-in Barbecue, Sandy Beach, Outdoor ShowerHas a Private Pool |
Parking & Garage No CarportHas a GarageNo Attached GarageNo Open ParkingParking Spaces: 3Parking: Garage,Detached |
Pool Pool: In GroundPool |
Frontage WaterfrontWaterfront: Gulf Front, Waterfront, Sandy Beach, Seawall: Cut/Natural, Dock: Wood, Dock Length: 100, Dockage: Boat Lift, Boat RampOn Waterfront |
Water & Sewer Sewer: Municipal Sewer |
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Days on Market: 26 |
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Year Built Year Built: 2022 |
Property Type / Style Property Type: ResidentialProperty Subtype: Single Family Residence |
Building Construction Materials: StuccoIs a New Construction |
Property Information Condition: New ConstructionParcel Number: 00375000000000 |
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Price List Price: $29,500,000Price Per Sqft: $2,950 |
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MLS Status: Active |
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Direction & Address City: MarathonCommunity: Crains Sub (58.0) |
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Listing Agent Listing ID: 619972 |
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HOA Fee Includes: NoneAssociation for this Listing: Marathon/Lower KeysNo HOAHOA Fee: No HOA Fee |
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Lot Area: 3.07 Acres |
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Mls Number: 619972Water ViewWater View: Bay/Gulf View |
Last check for updates: about 9 hours ago
Listing courtesy of Brett Harris PA, (305) 800-9030
Bespoke Real Estate
Originating MLS: Marathon/Lower Keys
Source: FLKMLS, MLS#619972
Market trends in Marathon
Last updated May 2026
Avg. sale price
$742K
$31.67KMoM
Sale-to-List Price
—
Price per sq ft
$610
$33MoM
Available listings
268
6MoM
Price History for 57783 Morton St
| Date | Price | Event | Source |
|---|---|---|---|
| 04/30/2026 | $29,500,000 | PriceChange | MIAMI #A11977067 |
| 03/05/2026 | $33,500,000 | Listed For Sale | MIAMI #A11977067 |
| 01/23/2026 | $33,500,000 | ListingRemoved | MIAMI #A11925907 |
| 12/05/2025 | $33,500,000 | Listed For Sale | MIAMI #A11925907 |
| 11/01/2018 | $1,590,000 | Sold | FLKMLS #577677 |
| 05/24/2018 | $1,599,000 | PriceChange | Agent Provided |
| 04/26/2018 | $1,649,000 | PriceChange | Agent Provided |
| 12/01/2017 | $1,699,000 | Listed For Sale | Agent Provided |
| 11/01/2017 | $1,750,000 | ListingRemoved | N/A |
| 05/02/2017 | $1,750,000 | Listed For Sale | N/A |
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Property Tax and Assessment
| Year | 2025 |
|---|---|
| Tax | $33,508 |
| Assessment | $5,549,027 |
Home facts updated by county records
Comparable Sales for 57783 Morton St
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.03 | Single-Family Home | $3,550,000 | 12/05/25 | 6 | 6 | 5,757 | |
0.45 | Single-Family Home | $3,800,000 | 06/08/26 | 3 | 4.5 | 4,000 | |
0.34 | Single-Family Home | $2,700,000 | 05/29/26 | 4 | 2.5 | 1,464 | |
0.99 | Single-Family Home | $2,200,000 | 12/17/25 | 4 | 4.5 | 2,433 | |
0.39 | Single-Family Home | $580,000 | 05/20/26 | 3 | 2 | 1,147 | |
0.41 | Single-Family Home | $525,000 | 12/17/25 | 3 | 1 | 912 | |
0.28 | Single-Family Home | $440,000 | 12/01/25 | 2 | 1 | 874 | |
0.49 | Single-Family Home | $500,000 | 10/29/25 | 2 | 2 | 864 | |
0.47 | Single-Family Home | $390,000 | 12/30/25 | 3 | 1 | 1,008 | |
0.21 | Single-Family Home | $200,000 | 11/18/25 | 4 | 3 | 1,740 |
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Get a sense of prices in the area by checking nearby homes.
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Assigned Schools
These are the assigned schools for 57783 Morton St.
- Marathon School
- 6-12
- Public
- 797 Students
5/10GreatSchools RatingParent Rating AverageMarathon high school has a horrible education system I went there for a tew years and couldn't tell you one productive thing I've learned in that school administration also blows some of them have horrible attitude and hardly ever do anything about occurring issues they focus on dress code and attendance rather than the drug issue there which seem to be more important than a little rip in your jeans and other deceitful things that happen there as well they are extremely disorganized when it comes to state testing I would not recommend putting your child in this school they also seem to disregard issues between students until it gets physical and have to do something about it most the time they'd rather sit around because they don't like to write reports the things that they discipline for is absolutely ridiculous your child will get disciplined for a tardy before they'll get disciplined for skipping classes they'll bring it your attention when your child's academics are at risk due to poor attendance.Other Review10mo ago - Stanley Switlik Elementary School
- PK-5
- Public
- 573 Students
4/10GreatSchools RatingParent Rating AverageStanley Switlik Elementary has amazingly dedicated, caring teachers and staff. I could not ask for better for my son.Parent Review16y ago 
Check out schools near 57783 Morton St.
What Locals Say about Marathon
At least 61 Trulia users voted on each feature.
83 % Say car is needed
79 % Say people would walk alone at night
76 % Say parking is easy
72 % Say it's quiet
70 % Say it's dog friendly
70 % Say yards are well-kept
68 % Say there's holiday spirit
61 % Say it's walkable to restaurants
53 % Say there's wildlife
53 % Say they plan to stay for at least 5 years
51 % Say there are community events
48 % Say kids play outside
44 % Say neighbors are friendly
37 % Say it's walkable to grocery stores
36 % Say there are sidewalks
29 % Say streets are well-lit
Sourced by Trulia users. Learn more about our methodology.
LGBTQ Local Legal Protections
LGBTQ Local Legal Protections
Brett Harris PA, Bespoke Real Estate
Agent Phone: (305) 800-9030
MLS Internet Data Exchange (IDX) information is provided exclusively 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, and that the data is deemed reliable but is not guaranteed accurate by the Florida Keys Board of Realtors.
57783 Morton St, Grassy Key, FL 33050 is a 10 bedroom, 13 bathroom, 10,000 sqft single-family home built in 2022. This property is currently available for sale and was listed by FLKMLS on May 20, 2026. The MLS # for this home is MLS# 619972.