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31449 Avenue I
Big Pine Key FL 33043 US

$4,850,000

Active Listing ID 617356
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5 bed
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3,500 square feet
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4.00 Bath (4 Full)
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Lot: 0.18 Acres
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Single Family Residence

$4,850,000

Active Listing ID 617356
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31449 Avenue I Experience mesmerizing sun and moon rises over the water, views of distant islands, bridges, boats cruising by, sea life. Dolphinus del Sol is a waterfront estate masterpiece! A custom, ultra - modern smart home. This new construction, solid precast concrete home, features vaulted ceilings, sleek contemporary lines, and expansive windows and doors showcasing panoramic water views. A key feature is the boating canal and your own private dock, with vessel access to both the Gulf and the Atlantic Ocean, with bridge clearances of 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. The sleek contemporary kitchen has black stainless steel smart appliances which complement the black, dazzling mirror fleck Silestone countertops. A mirror panel gives you access to a sliding appliance tray from the pantry. The unique, curved wall master bedroom has a seating area by the glass doors, that open for a tropical breeze. A walk-in closet for your wardrobe. The en-suite master bath, is an expansive oasis featuring a heated, 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. Flowing stained floors are throughout. 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. There is a garage and under house parking for up to 6 vehicles. The 2300 sq ft open 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. This home is a fortress! Schedule your private tour to experience this waterfront paradise toda

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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: Central Air
  • Exterior Finish: Storage
  • Floor Covering: Concrete
  • Roof Type: Concrete
  • Heating Fuels: Central, Electric (Heating)
  • Additional Features
  • Patio
  • Waterfront

Property

  • propertytype: Residential
  • propertysubtype: Single Family Residence
  • listprice: 4850000
  • 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: kwa.mls261545422
  • listagentpreferredphone: 8136426030
  • listagentofficephone: 8136426030
  • listofficekey: 3yd-KWARFL-20220815192324420032000000
  • listofficemlsid: kwa.mlsoff55850
  • 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
  • listingcontractdate: 2025-11-13
  • listagenturl: http://flatfeemlsrealty.com
  • countyorparish: Monroe
  • parcelnumber: 00110960-000000
  • appliances: Washer, Dryer, Dishwasher, Refrigerator, Range, Microwave, Ice Machine
  • cooling: Central Air
  • flooring: Concrete
  • heating: Central, Electric (Heating)
  • fireplaceyn: False
  • transactiontype: ForSale
  • storiestotal: 0
  • parkingtotal: 0
  • roof: Concrete
  • view: Ocean
  • waterfrontyn: True
  • franchiseaffiliation: None
  • interiorfeatures: Cathedral Ceilings, Walk-in Closet(s)
  • exteriorfeatures: Storage
  • architecturalstyle: Other
  • rooms: Bathroom 4, Bedroom 4, Bedroom 5, Bedroom 3, Bathroom 2, Bathroom 1, Great Room, Bathroom 3, Bedroom 2, Bedroom 1
  • otherstructures: Storage
  • patioandporchfeatures: Porch, Patio
  • 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, "CustomSourceId":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":"", "ListOfficeBrokerMlsId":"20220815192324420032000000", "ListOfficeCity":"Tampa", "ListOfficeCountry":"US", "ListOfficeEmail":"team@flatfeemlsrealty.com", "ListOfficePostalCode":"33569", "ListOfficeStateOrProvince":"FL", "ListPriceCurrencyType":"USD", "ListingTitle":"Residential, 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":"2026-10-23 19:15:38", "Neighborhoods":[{"Description":null, "Name":"Sands Sub (31.0)"}], "PostalCode":null, "RoomCount":8, "StateOrProvince":null, "Taxes":[{"TaxAnnualAmount":4415, "TaxDescription":"25 66 29 BIG PINE KEY FILLED BAY BTM ADJ BLK 51 SANDS SUB PB1-65 (II DEED 22579) OR369-618 OR421-700 OR470-215 OR974-788", "TaxYear":"2024"}], "UnitNumber":null, "UnparsedAddress":null}
Listing Changed: 10/23/2026 7:18:13 PM GMT
Source Updated Date: 10/24/2026 10:55:23 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.