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.
New construction
Price cut: $4M (4/30)
$29,500,000
57783 Morton St, Grassy Key, FL 33050
10beds
10,000sqft
Single Family Residence
Built in 2022
3.07 Acres Lot
$-- Zestimate®
$2,950/sqft
$-- HOA
What's special
Guest and pool housesDeepwater navigable dockQuartzite countersGenerous room proportionsSmart home systemsLuxe outdoor livingPorcelain flooring
- 38 days |
- 2,302 |
- 91 |
Zillow last checked:
Listing updated:
Listed by:
Brett Harris PA 305-800-9030,
Bespoke Real Estate
Source: FLKMLS,MLS#: 619972
Originating MLS: Marathon/Lower Keys
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Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 10
- Bathrooms: 13
- Full bathrooms: 11
- 1/2 bathrooms: 2
Heating
- Central, Solar, Electric
Cooling
- Central Air, Ceiling Fans(s)
Appliances
- Included: Washer, Stainless Steel Appliance(s), Ice Machine, Freezer, Microwave, Oven, Refrigerator, Dryer, Other Appliances
- Laundry: Laundry Room
Features
- Fireplace(s), Walk-In Closet(s), Elevator, Built-in Cabinets, Gym, Other Specialty Room, Sun/Florida Room, Media Room
- Doors: Impact Rstnce Doors
- Has fireplace: Yes
Interior area
- Total interior livable area: 10,000 sqft
Property
Parking
- Total spaces: 3
- Parking features: Garage, Detached
- Has garage: Yes
Features
- Levels: Two
- Stories: 2
- Patio & porch: Open Porch/Balcony, Deck, Screened Patio, Patio
- Exterior features: Built-in Barbecue, Sandy Beach, Outdoor Shower
- Has private pool: Yes
- Pool features: In Ground
- Has view: Yes
- View description: Bay/Gulf View
- Has water view: Yes
- Water view: Bay/Gulf View
- Waterfront features: Gulf Front, Waterfront, Sandy Beach, Seawall: Cut/Natural, Dock: Wood, Dock Length: 100, Dockage: Boat Lift, Boat Ramp
Lot
- Size: 3.07 Acres
- Dimensions: 60 x 725
- Features: 2 Less Than 5 Acres
Details
- Additional structures: Detached Guest Qtrs
- Parcel number: 00375000000000
- Zoning: RM
- Zoning description: Residential Medium
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Materials
- Stucco
Condition
- New Construction
- New construction: Yes
- Year built: 2022
Utilities & green energy
- Sewer: Municipal Sewer
Green energy
- Energy generation: Solar
Community & HOA
Community
- Subdivision: Crains Sub (58.0)
HOA
- Has HOA: No
- Services included: None
Location
- Region: Grassy Key
Financial & listing details
- Price per square foot: $2,950/sqft
- Tax assessed value: $5,549,027
- Annual tax amount: $33,507
- Date on market: 5/20/2026
Estimated market value
Not available
Estimated sales range
Not available
$4,934/mo
Price history
| Date | Event | Price |
|---|---|---|
| 4/30/2026 | Price change | $29,500,000-11.9%$2,950/sqft |
Source: | ||
| 3/5/2026 | Listed for sale | $33,500,000$3,350/sqft |
Source: | ||
| 1/23/2026 | Listing removed | $33,500,000$3,350/sqft |
Source: | ||
| 12/5/2025 | Listed for sale | $33,500,000+2006.9%$3,350/sqft |
Source: | ||
| 11/1/2018 | Sold | $1,590,000-0.6%$159/sqft |
Source: | ||
| 5/24/2018 | Price change | $1,599,000-3%$160/sqft |
Source: Water Vista Realty LLC #577677 Report a problem | ||
| 4/26/2018 | Price change | $1,649,000-2.9%$165/sqft |
Source: Water Vista Realty LLC #577677 Report a problem | ||
| 12/1/2017 | Listed for sale | $1,699,000-2.9%$170/sqft |
Source: Water Vista Realty LLC #577677 Report a problem | ||
| 11/1/2017 | Listing removed | $1,750,000$175/sqft |
Source: Owner Report a problem | ||
| 5/2/2017 | Listed for sale | $1,750,000$175/sqft |
Source: Owner Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $33,508 -2.6% | $3,852,382 +2.9% |
| 2024 | $34,409 +92.4% | $3,743,812 +100.9% |
| 2023 | $17,887 +79% | $1,863,068 +79.2% |
| 2022 | $9,994 +8.9% | $1,039,497 +14.7% |
| 2021 | $9,179 +2.8% | $906,195 +1.4% |
| 2020 | $8,928 | $893,684 -26.6% |
| 2019 | $8,928 -28.6% | $1,217,976 +30.1% |
| 2018 | $12,503 +34.6% | $935,920 +21.2% |
| 2017 | $9,292 +12.1% | $772,333 -5% |
| 2016 | $8,287 -7.2% | $813,398 -2.1% |
| 2015 | $8,926 | $830,813 |
Find assessor info on the county website
Monthly payment
Est. payment$--/mo
Payment breakdown
Explore the cost of this home by adjusting the details. Changes won't be saved.All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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Climate risks
Neighborhood: 33050
Nearby schools
GreatSchools rating
- 5/10Stanley Switlik Elementary SchoolGrades: PK-5Distance: 8.9 mi
- 5/10Marathon SchoolGrades: 6-12Distance: 8.2 mi
A local agent can set up tours, give advice and negotiate with sellers.
- Florida
- Monroe County
- Marathon
- 33050
- 57783 Morton St


