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$5,200,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 6 Beds
  • 8 Full Baths
  • 5,400 Sq. Ft.
  • Updated 5 days ago
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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.

Full Property Details for 259 St Thomas Ave

General

  • Price: $5,200,000
  • Taxes: $7,831 (2025)
  • Status: Active
  • Type: Single Family
  • Source: 927
  • MLS ID: 621737
  • Updated: 10/21/2026
  • Added to Site: 6 day(s) ago

Interior

  • Interior Features: Walk-in Closet(s), Built-in Cabinets, Pantry
  • Appliances: Stainless Steel Appliance(s), Dishwasher, Microwave, Oven, Refrigerator
  • Flooring: Tile

Rooms

Bathrooms

  • Total Bathrooms: 8
  • Full Bathrooms: 8

Bedrooms

  • Total Bedrooms: 6

Other Rooms

  • Laundry: Laundry Room

Additional Information

  • Pool: Yes
  • Pool Description: In Ground

Exterior

  • Exterior Features: Lighting, Fencing, Gazebo
  • Deck/Patio: Open Porch/Balcony
  • Porch/Patio/Deck: Open Porch/Balcony

Parking

  • Garage: Yes

Location

  • Area: 27 - Key Largo MM 97-107
  • County: Monroe
  • Subdivision: Port Largo (100.0)

Community

  • Assoc. Fees Include: None
  • Pets Allowed: Yes

Heating & Cooling

  • Central air: Yes
  • Air Conditioning: Yes
  • Cooling Type: Central Air, Ceiling Fans(s)

Utilities

  • Water: Cistern

Structural Information

  • Architectural Style: Above Flood
  • Construction Status: New Construction
  • Construction: CBS
  • Windows/Doors: Impact Rstnce Doors, Impact Rstnce Window, Sliding Glass Doors
  • Square Feet: 5,400
  • Sq. Ft. Source: Builder/Architect
  • Year Built: 2026
  • Property Condition: New Construction

Lot Features

  • Property View: Canal
  • Lot Size (Acres): 0.25
  • Lot Size (Sq. Ft.): 11,078
  • Lot Dimensions: x
  • Zoning: IS - Improved Subivision District

Water Features

  • Water Front: Yes
  • Water View: Yes
  • Water Front Desc.: Canal Front

Financial Considerations

  • Tax Amount: $7,831.34
  • Tax Year: 2025

Disclosures and Reports

  • Legal Description: LT 259 PORT LARGO THIRD ADDITION KEY LARGO PB6-58 OR496-967 OR1637-1212 OR1819-742AFF OR1819-762 OR3175-1907
  • Flood Zone: AE, AE
  • APN: 00453473-000200

Listed by Golden International Realty, Merlin Perez (305) 798-9725

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Listing agent

— 259 St Thomas Ave —

  • Merlin Perez

    Golden International Realty

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 259 St Thomas Ave

School District:Monroe County School District, Middle Torch Key, FL
NameGradesDistance
Key Largo School
104801 Overseas Highway, Key Largo, FL 33037
PK-85.2 mi
Coral Shores High School
89901 Old Highway, Tavernier, FL 33070
9-129.3 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 259 St Thomas Ave Get Price Alerts and Save Property

Date
Details
Price
Change
Source
10/21/2026
Listed
$5,200,000
136.36%
MLS
5/20/2022
Sold
$2,200,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 259 St Thomas Ave

Year
Property Taxes
Change
Tax Assessment
Change
2025
$7,831
11%
$991,171
6%
2024
$7,076
12%
$935,804
18%
2023
$6,319
304%
$796,107
312%
2021
$1,566
-13%
$193,014
-29%
2022
$1,796
15%
$270,231
40%
2021
$1,566
-1%
$193,066
—
2019
$1,580
3%
$193,117
9%
2018
$1,531
10%
$176,639
—
2017
$1,391
10%
$175,774
20%
2016
$1,263
-15%
$145,983
7%
2015
$1,488
-14%
$136,170
10%
2014
$1,722
61%
$123,791
10%
2013
$1,072
—
$112,538
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 259 St Thomas Ave

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*These costs are estimates, and the interest rates assume exceptional credit standing.

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

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Listed by Golden International Realty, Merlin Perez (305) 798-9725

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259 Saint Thomas Avenue, Key Largo, FL 33037 (MLS# 621737) is a Single Family property with 6 bedrooms and 8 full bathrooms. 259 Saint Thomas Avenue is currently listed for $5,200,000 and was received on October 21, 2026. Want to learn more about 259 Saint Thomas Avenue? Do you have questions about finding other Single Family real estate for sale in Key Largo? You can browse all Key Largo real estate or contact a Coldwell Banker agent to request more information.

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