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31449 Avenue I
Big Pine Key FL 33043 US

$5,800,000

Active Listing ID 617356
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5 bed
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4.00 Bath (4 Full)
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Lot: 0.18 Acres
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Single Family Residence

$5,800,000

Active Listing ID 617356
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31449 Avenue I Dolphinus del Sol is a Waterfront Estate Masterpiece! Enjoy this custom, ultra-modern smart home! This new construction, solid precast concrete home, offers unparalleled luxury, with vaulted ceilings, sleek contemporary lines, and expansive windows and doors showcasing breathtaking panoramic water views. Experience mesmerizing sun and moon rises over the water, views of distant islands, bridges, boats cruising by, sea life, etc. This tropical paradise features a boating canal and private dock, with vessel access to both the Gulf and the Atlantic Ocean. Bridge clearance is 11 ft. Entertain in style with the upper level, grand, open living room and kitchen area, which features soaring ceilings and walls of glass, with 8ft opening to the deck for al fresco dining. The sleek contemporary kitchen has a round porthole window. A mirror panel opens to a sliding appliance tray from the pantry. Black stainless steel smart appliances compliment the black, dazzling mirror fleck Silestone countertops. Floors throughout are custom designed, stained and sealed. The unique, curved wall master bedroom has a seating area by the glass doors, that open for a tropical breeze and a walk-in closet. The en suite master bath, is an expansive oasis featuring a jetted tub and 5 x 5 ft shower. The lower living level great room features a large theater/entertainment area with two walls of windows that have sweeping water views. This 3500 sq ft, 5 bedroom, 4 bath home also has outdoor space including two covered upper decks and a 500 sq ft ground level patio featuring sea life art. Also there is a garage and under house parking for up to 6 vehicles. The 2300 sq ft open waterfront area has ample space to add features overlooking the water. This construction exceeds 180 mph hurricane code. This is a solid, precast concrete panel construction, including the floors, roof and stairs. The poured concrete pilings go 9 ft below grade, 5 ft into caprock, connected with a 20 in deep grade beam.

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Property Features

  • Facts
  • Lot Size: 0.18 Acres
  • Property Type: Residential
  • Property Sub-type: Single Family Residence
  • Features
  • Full Bathrooms: 4
  • Cooling System: Ceiling Fan(s)
  • Exterior Finish: Storage
  • Floor Covering: Concrete
  • Roof Type: Concrete
  • Additional Features
  • Waterfront

Property

  • propertytype: Residential
  • propertysubtype: Single Family Residence
  • listprice: 5800000
  • unparsedaddress: 31449 Avenue I
  • postalcity: Big Pine Key
  • stateorprovince: FL
  • country: US
  • postalcode: 33043
  • bathroomsfull: 4
  • bathroomshalf: 0
  • bathroomsonequarter: 0
  • bathroomsthreequarter: 0
  • lotsizeacres: 0.18
  • lotsizeunits: Acres
  • lotsizearea: 0.18
  • livingarea: 3500
  • livingareaunits: Square Feet
  • latitude: 24.674978
  • longitude: -81.341978
  • listagentfullname: Stephen Hachey
  • listagentemail: team@flatfeemlsrealty.com
  • listagentkey: 3yd-KWARFL-20220815192708579738000000
  • listagentmlsid: 20220815192708579738000000
  • listagentpreferredphone: 8136426030
  • listagentofficephone: 8136426030
  • listofficekey: 3yd-KWARFL-20220815192324420032000000
  • listagentstatelicense: 3389117
  • listofficemlsid: 20220815192324420032000000
  • disclaimer: Copyright © 2026 Key West Association 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: KWARFL
  • yearbuilt: 2025
  • listagenturl: http://flatfeemlsrealty.com
  • countyorparish: Monroe
  • parcelnumber: 00110960-000000
  • appliances: Dishwasher, Dryer, Microwave, Range, Refrigerator, Washer
  • cooling: Ceiling Fan(s)
  • constructionmaterials: Other
  • flooring: Concrete
  • fireplaceyn: False
  • transactiontype: ForSale
  • storiestotal: 3
  • parkingtotal: 0
  • roof: Concrete
  • view: Ocean
  • waterfrontyn: True
  • interiorfeatures: Cathedral Ceilings, Walk-in Closet(s), Other
  • exteriorfeatures: Storage
  • waterfrontfeatures: Waterfront
  • architecturalstyle: Other
  • rooms: Bathroom 1, Bathroom 2, Bathroom 3, Bathroom 4, Bedroom 1, Bedroom 2, Bedroom 3, Bedroom 4, Bedroom 5
  • otherstructures: Storage
  • dock: False
  • poolprivateyn: False
  • spayn: False
  • internetaddressdisplayyn: True
  • internetautomatedvaluationdisplayyn: True
  • internetconsumercommentyn: True
  • location: -81.34198, 24.674978
  • customfields: {"AdditionalInformation":{}, "AlternatePrices":[], "BrokerName":"Flat Fee MLS Realty", "BuilderEmail":null, "BuilderFax":null, "BuilderPhone":null, "City":null, "Country":null, "Expenses":[], "GeocodeOptions":null, "LeadRoutingEmail":"team@flatfeemlsrealty.com", "ListBrokerageCity":"Tampa", "ListBrokerageCountry":"US", "ListBrokerageEmail":null, "ListBrokerageLogoUrl":null, "ListBrokerageName":"Flat Fee MLS Realty", "ListBrokeragePhone":"(813) 642-6030", "ListBrokeragePostalCode":null, "ListBrokerageStateOrProvince":"FL", "ListBrokerageUnitNumber":null, "ListBrokerageUnparsedAddress":"10853 Boyette Road", "ListBrokerageWebsiteUrl":null, "ListOfficeAddress1":"10853 Boyette Road", "ListOfficeAddress2":null, "ListOfficeBrokerMlsId":null, "ListOfficeCity":"Tampa", "ListOfficeCountry":"US", "ListOfficeEmail":"team@flatfeemlsrealty.com", "ListOfficePostalCode":"33569", "ListOfficeStateOrProvince":"FL", "ListPriceCurrencyType":"USD", "ListingTitle":"Residential - Single Family - Big Pine Key, FL", "ListingURL":"https://www.realtor.com/realestateandhomes-detail/31449-Avenue-I_Big-Pine-Key_FL_33043_M59111-20965?f=listhub&s=KWARFL&m=617356&c=rexren", "MLSModificationTimestamp":"2025-11-20T13:28:36Z", "Neighborhoods":[{"Description":null, "Name":"11 - Big Pine Key"}, {"Description":null, "Name":"No Name Key"}], "PostalCode":null, "RawPropertySubType":"Residential - Single Family", "RawPropertyType":"Residential", "RoomCount":null, "StateOrProvince":null, "Taxes":[{"TaxAnnualAmount":4414.65, "TaxDescription":null, "TaxYear":"2024"}], "UnitNumber":null, "UnparsedAddress":null}
Listing Changed: 1/1/2026 1:23:33 AM GMT
Source Updated Date: 1/12/2026 6:52:21 AM GMT

Courtesy of: Stephen Hachey, Flat Fee MLS Realty, team@flatfeemlsrealty.com

Copyright © 2026 Key West Association 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.