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.
For sale
Price cut: $350K (6/9)
$4,850,000
31449 Avenue I, Big Pine Key, FL 33043
5beds
3,500sqft
Single Family Residence
Built in 2025
7,840 Square Feet Lot
$4,543,300 Zestimate®
$1,386/sqft
$-- HOA
What's special
Round porthole windowSleek contemporary kitchenCustom ultra-modern smart homeTwo covered upper decksVaulted ceilingsSleek contemporary linesWalk-in closet
- 288 days
- 498
- 2
Zillow last checked:
Listing updated:
Listed by:
Stephen Hachey 813-642-6030,
Flat Fee MLS Realty
Source: FLKMLS,MLS#: 617356
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 5
- Bathrooms: 4
- Full bathrooms: 4
Bedroom 1
- Level: Third
- Area: 294 Square Feet
- Dimensions: 14 x 21
Bedroom 1
- Level: Second
- Area: 187 Square Feet
- Dimensions: 11 x 17
Bedroom 2
- Level: Second
- Area: 273 Square Feet
- Dimensions: 13 x 21
Bedroom 3
- Level: Third
- Area: 195 Square Feet
- Dimensions: 15 x 13
Bedroom 4
- Level: Second
- Area: 195 Square Feet
- Dimensions: 15 x 13
Kitchen
- Level: Third
- Area: 180 Square Feet
- Dimensions: 10 x 18
Living room
- Level: Third
- Area: 360 Square Feet
- Dimensions: 18 x 20
Other
- Description: great room
- Level: Second
Heating
- Has Heating (Unspecified Type)
Cooling
- Central Air, Ceiling Fans(s)
Appliances
- Included: Washer, Dryer, Dishwasher, Refrigerator, Range, Microwave, Ice Maker
Features
- Walk-in Closet(s)
- Flooring: Concrete
Interior area
- Total structure area: 3,500
- Total interior livable area: 3,500 sqft
Property
Features
- Patio & porch: Open Porch/Balcony, Patio
- Exterior features: Storage
- On waterfront: Yes
Lot
- Size: 7,840 Square Feet
Details
- Parcel number: 00110960000000
- Zoning: OTH - Other Zoning
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Other
- Property subtype: Single Family Residence
Materials
- Other
Condition
- Year built: 2025
Utilities & green energy
- Utilities for property: See Remarks
Community & HOA
Community
- Security: Other
- Subdivision: Sands Sub (31.0)
HOA
- Has HOA: No
- Services included: None
Location
- Region: Big Pine Key
Financial & listing details
- Price per square foot: $1,386/sqft
- Tax assessed value: $1,594,694
- Annual tax amount: $4,414
- Date on market: 11/18/2025
- Listing terms: Cash,Conventional,FHA
Estimated market value
$4,543,300
$4.32M - $4.77M
$7,388/mo
Price history
| Date | Event | Price |
|---|---|---|
| 6/9/2026 | Price change | $4,850,000-6.7%$1,386/sqft |
Source: | ||
| 5/4/2026 | Price change | $5,200,000-10.3%$1,486/sqft |
Source: | ||
| 11/18/2025 | Listed for sale | $5,800,000+2009.1%$1,657/sqft |
Source: | ||
| 8/14/2020 | Sold | $275,000-6.8%$79/sqft |
Source: | ||
| 3/21/2020 | Listed for sale | $295,000+181%$84/sqft |
Source: Coldwell Banker Schmitt RE Co. Lower Keys Office #590363 Report a problem | ||
| 4/16/1996 | Sold | $105,000-19.2%$30/sqft |
Source: Public Record Report a problem | ||
| 6/19/1995 | Sold | $130,000$37/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $13,155 +198% | $1,328,925 +329.2% |
| 2024 | $4,415 +5.4% | $309,614 +10% |
| 2023 | $4,188 +42.2% | $281,467 +10% |
| 2022 | $2,946 +3.5% | $255,879 +10% |
| 2021 | $2,845 +12.2% | $232,617 +28.8% |
| 2020 | $2,536 | $180,556 +10% |
| 2019 | $2,536 +13.6% | $164,142 +5.6% |
| 2018 | $2,232 +2.1% | $155,427 -52.2% |
| 2017 | $2,187 -36.4% | $325,470 +19% |
| 2016 | $3,437 +7.8% | $273,559 +12% |
| 2015 | $3,188 | $244,142 |
Find assessor info on the county website
Monthly payment
Est. payment






