For sale by owner

$25,000,000

258 Atlantic Blvd, Key Largo, FL 33037

6beds

5,600sqft

Est.:

SingleFamily

Built in 2026

0.29 Acres Lot

$-- Zestimate^®

$4,464/sqft

$-- HOA

What's special

Waterfront double lotTwo gigantic housesMetal roofingWater caster systemSolar panels

Brand-new 2026 waterfront double lot with two gigantic houses, one main house and a guest house adjacent. Features 6 bedrooms ad 7.5 bathrooms with all updated and the most modern construction available. The unfurnished residence is one of a kind offering a chef's kitchen with premium sub-zero appliances. The main residence and guest house have metal roofing, solar panels, and a water caster system. Between the main house and the guest house is a luxury mid-size pool and cabana area. The dock is 65 feet long on two lots that's perfect for three or more boats and life on the fresh water canal. This is a once in a lifetime opportunity as the nicest and largest two houses in the keys that combines modern design, new construction, and luxury living for friends and family to vacation right next door.

23 days

760

17

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 6
Bathrooms: 8
Full bathrooms: 7
1/2 bathrooms: 1

Heating

Forced air, Solar

Cooling

Central

Appliances

Included: Microwave, Range / Oven

Features

Flooring: Tile
Has fireplace: No

Interior area

Total interior livable area: 5,600 sqft

Property

Parking

Parking features: Garage - Attached

Features

Exterior features: Cement / Concrete, Metal
Has spa: Yes
Has view: Yes
View description: Water
Has water view: Yes
Water view: Water

Lot

Size: 0.29 Acres

Details

Parcel number: 00453430000000

Construction

Type & style

Home type: SingleFamily

Materials

Concrete Block
Foundation: Piling
Roof: Metal

Condition

New construction: No
Year built: 2026

Community & HOA

Location

Region: Key Largo

Financial & listing details

Price per square foot: $4,464/sqft
Tax assessed value: $2,320,416
Annual tax amount: $9,989
Date on market: 2/3/2026

Estimated market value

Not available

Estimated sales range

Not available

$6,580/mo

Price history

Date	Event	Price
2/3/2026	Listed for sale	$25,000,000+4173.5%$4,464/sqft
Source: Owner Report a problem
2/28/1997	Sold	$585,000$104/sqft
Source: Public Record Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$9,989 +4.9%	$1,174,868 +2.9%
2024	$9,526 +3.1%	$1,141,758 +3%
2023	$9,238 +6.3%	$1,108,503 +3%
2022	$8,687 -2.3%	$1,076,217 +3%
2021	$8,890 +0.7%	$1,044,871 +1.4%
2020	$8,832	$1,030,445 +2.3%
2019	$8,832 +2%	$1,007,278 -2.8%
2018	$8,659 -4.5%	$1,036,810 +2.1%
2017	$9,067 +2.2%	$1,015,485 +2.1%
2016	$8,875 -1.4%	$994,599 +2.8%
2015	$9,005	$967,824