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About This Home

This 5-bedroom, 4-bathroom single family at 31449 Avenue I in Big Pine Key, FL is listed for $5,200,000 ($1,486 per sqft). Built in 2025, the home offers 3,500 sqft of living space on a 0.18 acres lot.

Agent Description

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.

Key Features

  • Built in 2025
  • 0.18 acre lot
  • 3 stories
  • Waterfront

Property Details

3 stories
4 full
2025

Amenities

WaterfrontViewA/C

Monthly Cost Estimate

$27,811/mo

20% down · 6.5% · 30 years

Principal$3,761
Interest$22,533
Insurance$1,517

Estimates only. Actual payments may vary.

Location

31449 Avenue I

Big Pine Key, FL 33043

Sands Sub (31.0)

Features & Amenities

Interior Features

Walk-in Closet(s)

Exterior Features

Storage

Property Details

Flooring

Concrete

Views

Ocean

Pool Features

PorchPatio

Heating

CentralElectric (Heating)

Cooling

Central Air

Appliances

WasherDryerDishwasherRefrigeratorRangeMicrowaveIce Machine

Questions & Answers

This 5-bedroom, 4-bathroom single family at 31449 Avenue I is listed at $5,200,000 ($1,486/sqft). The estimated monthly payment is $22,533 based on 20% down at 6.5% interest.

Key features include: Built in 2025, 0.18 acre lot, 3 stories, Waterfront. Interior Features: Walk-in Closet(s). Exterior Features: Storage.

This property is listed by Stephen Hachey and can be reached at 8136426030 or team@flatfeemlsrealty.com.

SH

Stephen Hachey

Agent at Flat Fee MLS Realty

(813) 642-6030

Listed by Flat Fee MLS Realty · View on Broker Site

MLS# 617356· Source: listhub· Updated 200 days ago

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.

31449 Avenue I, Big Pine Key, FL 33043

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