New construction

$5,200,000

259 Saint Thomas Ave, Key Largo, FL 33037

6beds

5,400sqft

$33,854/mo

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Single Family Residence

Built in 2026

0.25 Acres Lot

$-- Zestimate^®

$963/sqft

$-- HOA

What's special

Completely fencedModern designsMetal roofCustom poolResort-style outdoor livingLuxury finishes throughoutCovered lounge areas

Stunning brand-new waterfront estate offering 6 bedrooms and 8 bathrooms with modern designs and luxury finishes throughout. The gourmet kitchen features premium Sub-Zero appliances and flows seamlessly into spacious living and entertaining areas. Built for long-term durability with a metal roof, solar panels, and a water cistern system. Enjoy resort-style outdoor living with a custom pool, covered lounge areas, and a 55-foot private dock with a garage and tackle room, perfect for boaters and fishing enthusiasts. Experience the best of modern waterfront living in Key Largo. House is completely fenced not shown on pictures because all fencing is new.

2 days
137
7

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 6
Bathrooms: 8
Full bathrooms: 8

Cooling

Central Air, Ceiling Fans(s)

Appliances

Included: Dishwasher, Refrigerator, Oven, Microwave, Stainless Steel Appliance(s)
Laundry: Laundry Room

Features

Pantry, Built-in Features, Walk-in Closet(s)
Flooring: Tile

Interior area

Total structure area: 5,400
Total interior livable area: 5,400 sqft

Property

Parking

Parking features: Garage
Has garage: Yes

Features

Patio & porch: Open Porch/Balcony
Exterior features: Lighting
Has private pool: Yes
Pool features: In Ground
Fencing: Fenced
On waterfront: Yes

Lot

Size: 0.25 Acres

Details

Additional structures: Gazebo
Parcel number: 00453473000200
Zoning: IS - Improved Subivision District

Construction

Type & style

Home type: SingleFamily
Property subtype: Single Family Residence

Materials

Condition

New Construction
New construction: Yes
Year built: 2026

Utilities & green energy

Water: Cistern

Green energy

Energy generation: Solar

Community & HOA

Community

Subdivision: Port Largo (100.0)

HOA

Has HOA: No
Services included: None

Location

Region: Key Largo

Financial & listing details

Price per square foot: $963/sqft
Tax assessed value: $991,171
Annual tax amount: $7,831
Date on market: 10/21/2026

Estimated market value

Not available

Estimated sales range

Not available

Price history

Date	Event	Price
10/21/2026	Listed for sale	$5,200,000-3.7%$963/sqft
Source: FLKMLS #621737 Report a problem
7/4/2026	Listing removed	$5,400,000$1,000/sqft
Source: FLKMLS #618563 Report a problem
5/11/2026	Pending sale	$5,400,000$1,000/sqft
Source: FLKMLS #618563 Report a problem
4/19/2026	Price change	$5,400,000-3.6%$1,000/sqft
Source: FLKMLS #618563 Report a problem
2/9/2026	Listed for sale	$5,600,000+2700%$1,037/sqft
Source: FLKMLS #618563 Report a problem
10/1/2002	Sold	$200,000$37/sqft
Source: Public Record Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$7,831 +10.7%	$963,290 +10%
2024	$7,076 +12%	$875,718 +10%
2023	$6,319 +251.8%	$796,107 +275%
2022	$1,796 +14.7%	$212,315 +10%
2021	$1,566 -0.7%	$193,014 0%
2020	$1,577	$193,066 0%
2019	$1,577 -0.2%	$193,117 0%
2018	$1,580 +3.2%	$193,169 +9.9%
2017	$1,531 +10.1%	$175,774 +20.4%
2016	$1,391 +10.1%	$145,983 -33.1%
2015	$1,263	$218,132