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16 Seaside Avenue
Key Largo FL 33037 US

$12,500,000

Active Listing ID 617061
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7 bed
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9.00 Bath (7 Full , 2 Half)
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Lot: 0.48 Acres
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Single Family Residence

$12,500,000

Active Listing ID 617061
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16 Seaside Avenue Welcome to 16 Seaside, an extraordinary oceanfront estate showcasing the perfect balance of modern design, functionality, and refined coastal living. This newly constructed residence is situated on a protected private basin offering the rare, secure deep-water dockage with a sandy peninsula. The private basin provides parking for up to six vessels, each equipped with shore power and water, making it a boater's dream. Spanning 6, 585 square feet under air, the home features seven bedrooms, seven en-suite baths, and two half baths, including dual primary suites designed for multi-generational living or guest privacy. The interior exudes modern luxury with a custom chef's kitchen, climate-controlled wine cellar, multi-level elevator, four-zone AC system, and comprehensive smart-home automation managing lighting, audio, climate, pool, and security. Every detail was curated for seamless living and entertaining, from the expansive third-floor entertainment suite overlooking the ocean to the open-concept living spaces lined with glass doors and terraces capturing panoramic views. Outdoors, enjoy a resort-style pool and spa, covered summer kitchen, and a tiki hut on your private sandy beach framed by lush landscaping and privacy fencing. Seven balconies provide stunning vantage points, while an automatic entry gate and approximately 2, 500 square feet of covered parking offer security and convenience. Built to last with reinforced, poured concrete construction, impact glass, and a whole-home generator, this residence combines elegance with durability. Set on a .48-acre double lot with flexible suburban/commercial zoning ideal for events and vacation rentals, 16 Seaside delivers unmatched versatility and long-term value. Located just one hour from Miami, this exceptional Key Largo waterfront estate embodies the essence of a Florida Keys lifestyle, where oceanfront serenity, modern craftsmanship, and world-class boating converge in one remarkable private estate sized property

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Property Features

  • Facts
  • Lot Size: 0.48 Acres
  • Property Type: Residential
  • Property Sub-type: Single Family Residence
  • Features
  • Full Bathrooms: 7
  • 1/2 Bathrooms: 2
  • Cooling System: Ceiling Fan(s)
  • Exterior Finish: Bar, Water Display, Storage, Sprinkler System, Sandy Beach, Privacy Wall/Fence, Outdoor Kitchen, Lanai, Hot Tub, Gazebo, Fencing, Chickee Hut, Built-in Grill
  • Floor Covering: Tile, Wood
  • Roof Type: Concrete
  • Additional Features
  • Waterfront

Property

  • propertytype: Residential
  • propertysubtype: Single Family Residence
  • listprice: 12500000
  • unparsedaddress: 16 Seaside Avenue
  • postalcity: Key Largo
  • stateorprovince: FL
  • country: US
  • postalcode: 33037
  • bathroomsfull: 7
  • bathroomshalf: 2
  • bathroomsonequarter: 0
  • bathroomsthreequarter: 0
  • lotsizeacres: 0.48
  • lotsizeunits: Acres
  • lotsizearea: 0.48
  • livingarea: 6585
  • livingareaunits: Square Feet
  • latitude: 25.041438
  • longitude: -80.492069
  • listagentfullname: Walters Luxury Group Gloria, Rachel and Michaela Walters
  • listagentemail: gwalters@oceansir.com
  • listagentkey: 3yd-FLKEYSMLSFL-20210730155050475112000000
  • listagentmlsid: 20210730155050475112000000
  • listagentpreferredphone: 3059426834
  • listagentofficephone: 3057128888
  • listofficekey: 3yd-FLKEYSMLSFL-20100727151734715717000000
  • listagentstatelicense: 662034_1
  • listofficemlsid: 20100727151734715717000000
  • disclaimer: Copyright © 2026 Florida Keys Board of REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
  • sourcesystemid: FLKEYSMLSFL
  • yearbuilt: 2025
  • listagenturl: https://oceansir.com/team/gloria-walters
  • countyorparish: Monroe
  • parcelnumber: 00492240-000000
  • appliances: Dishwasher, Dryer, Garbage Disposer, Microwave, Range, Refrigerator, Washer
  • cooling: Ceiling Fan(s)
  • constructionmaterials: Concrete
  • flooring: Tile, Wood
  • numberofunitstotal: 0
  • fireplaceyn: False
  • transactiontype: ForSale
  • storiestotal: 3
  • parkingtotal: 0
  • parkingfeatures: Carport, Covered, Guest, Open, RV
  • roof: Concrete
  • view: Ocean, Water
  • waterfrontyn: True
  • interiorfeatures: Drapes/Blinds Incl, Built-in Cabinets, Brazilian Quartzite Countertops, Quartz Countertops, Tray Ceilings, Bar, Walk-in Closet(s), Storage, Smoke Alarms, Sky Light(s), Security System, Elevator, Entrance Foyer, Pantry, Split Bedroom, Cathedral Ceilings, Wet Bar
  • exteriorfeatures: Bar, Water Display, Storage, Sprinkler System, Sandy Beach, Privacy Wall/Fence, Outdoor Kitchen, Lanai, Hot Tub, Gazebo, Fencing, Chickee Hut, Built-in Grill
  • waterfrontfeatures: Oceanfront, Waterfront
  • windowfeatures: Skylight(s)
  • architecturalstyle: Other
  • rooms: Bathroom 1, Bathroom 2, Bathroom 3, Bathroom 4, Bathroom 5, Bedroom 1, Bedroom 2, Bedroom 3, Bedroom 4, Bedroom 5
  • securityfeatures: Security System
  • otherstructures: Gazebo, Outdoor Kitchen, Storage
  • accessibilityfeatures: Accessible Elevator Installed
  • dock: False
  • poolprivateyn: False
  • spayn: True
  • fencing: Fenced, Privacy
  • internetaddressdisplayyn: True
  • internetautomatedvaluationdisplayyn: True
  • internetconsumercommentyn: True
  • location: -80.492065, 25.041437
  • customfields: {"AdditionalInformation":{}, "AlternatePrices":[], "BrokerName":"Ocean Sotheby's International Realty", "BuilderEmail":null, "BuilderFax":null, "BuilderPhone":null, "City":null, "Country":null, "Expenses":[], "GeocodeOptions":null, "LeadRoutingEmail":"gwalters@oceansir.com", "ListBrokerageCity":"Islamorada", "ListBrokerageCountry":"US", "ListBrokerageEmail":"russell.post@sothebysrealty.com", "ListBrokerageLogoUrl":null, "ListBrokerageName":"Ocean Sotheby's International Realty", "ListBrokeragePhone":"3057128888", "ListBrokeragePostalCode":"33036", "ListBrokerageStateOrProvince":"FL", "ListBrokerageUnitNumber":null, "ListBrokerageUnparsedAddress":"81888 Overseas Hwy", "ListBrokerageWebsiteUrl":"http://www.oceansir.com", "ListOfficeAddress1":"81888 Overseas Hwy", "ListOfficeAddress2":null, "ListOfficeBrokerMlsId":"20200515211417486585000000", "ListOfficeCity":"Islamorada", "ListOfficeCountry":"US", "ListOfficeEmail":"russell.post@sothebysrealty.com", "ListOfficePostalCode":"33036", "ListOfficeStateOrProvince":"FL", "ListPriceCurrencyType":"USD", "ListingTitle":"Residential - Single Family - Key Largo, FL", "ListingURL":"https://www.realtor.com/realestateandhomes-detail/16-Seaside-Ave_Key-Largo_FL_33037_M61668-56920?f=listhub&s=FLKEYSMLSFL&m=617061&c=rexren", "MLSModificationTimestamp":"2026-03-06T20:06:22Z", "Neighborhoods":[{"Description":null, "Name":"26 - Key Largo S of MM 96.9"}], "PostalCode":null, "RawPropertySubType":"Residential - Single Family", "RawPropertyType":"Residential", "RoomCount":null, "StateOrProvince":null, "Taxes":[{"TaxAnnualAmount":11156.25, "TaxDescription":null, "TaxYear":"2024"}], "UnitNumber":null, "UnparsedAddress":null}
Listing Changed: 3/7/2026 3:30:44 AM GMT
Source Updated Date: 3/11/2026 7:05:06 PM GMT

Courtesy of: Walters Luxury Group Gloria, Rachel and Michaela Walters, Ocean Sotheby's International Realty, gwalters@oceansir.com

Copyright © 2026 Florida Keys Board of REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.