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$4,500,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 4 Beds
  • 3 Full Baths
  • 2,620 Sq. Ft.
  • Updated 2 days ago
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There are places where the water is part of the view. And then there's Duck Key, where it shapes the entire way of life. Set in the heart of the Florida Keys, this two-story waterfront residence brings together thoughtful living spaces, beautiful open-water scenery, and everything that makes island life so distinctive. The home offers four bedrooms and three bathrooms, surrounded by lush landscaping and designed to make the most of its waterfront setting. Outside, the property really comes into its own. A private pool, beach area, and dock put the water at the center of every day. And for boaters, the details matter: A 30,000-pound boat lift, a jet ski lift, a fish cleaning station, and steps leading right into the water. A morning offshore, an afternoon exploring the keys, or a quiet evening back at the pool. Here, those aren't special occasions. They're simply options. Upstairs, the open living kitchen areas are made for gathering, but the water remains the focal point with sliding glass doors that open to an expansive balcony that wraps around the upper level. The upper floor also includes the master bedroom with an ensuite bath, second bedroom and full bath in the hallway. Downstairs, a second living area, kitchenette, two additional bedrooms, and another full bathroom create a flexible layout for family and guests. From the lower level, step outside to the balcony, pool, beach and dock. Beyond the property, Duck Key has its own distinctive appeal. Join the optional Duck Key clubhouse for a pool, tennis, pickleball, and events, or Hawks Cay Resort for its Michelin-rated Salt and Ash restaurant, saltwater lagoon, Dolphin Connection, and pools.

Full Property Details for 422 Harbour Dr

General

  • Price: $4,500,000
  • Taxes: $20,458 (2025)
  • Status: Active
  • Type: Single Family
  • Source: MidFloridaRegionalMLS
  • MLS ID: NS1089477
  • Updated: 10/14/2026
  • Added to Site: 2 day(s) ago

Rental Information

  • Min. Lease: No Minimum

Interior

  • Number of Rooms: 10
  • Interior Features: Beamed Ceilings, Cathedral Ceiling(s), Ceiling Fan(s), High Ceilings, Open Floorplan, PrimaryBedroom Upstairs, Solid Wood Cabinets, Thermostat, Window Treatments
  • Appliances: Built-In Oven, Cooktop, Dishwasher, Disposal, Electric Cooktop, Electric Water Heater, Freezer, Microwave, Range, Refrigerator, Washer, Wine Refrigerator
  • Furnishings: Furnished
  • Flooring: Ceramic Tile, Travertine

Rooms

Bathrooms

  • Total Bathrooms: 3
  • Full Bathrooms: 3

Bedrooms

  • Total Bedrooms: 4

Other Rooms

  • Laundry: Inside

Additional Information

  • Pool: Yes
  • Private Pool: Yes
  • Pool Description: In Ground, Gunite
  • Security/Safety: Security Lights, Smoke Detector(s)

Exterior

  • Exterior Features: Balcony, Irrigation System, Lighting, Outdoor Grill, Private Mailbox, Rain Gutters, Sliding Doors, Storage

Parking

  • Garage: Yes
  • Attached garage: Yes
  • Garage Spaces: 1
  • Covered Spaces: 1

Location

  • Area: 33050 - Marathon
  • County: Monroe
  • Development Name: 33050 - Marathon
  • Subdivision: HARBOUR ISLAND AMD
  • Driving Directions: Overseas Highway to the Duck Key Dr entrance. Stay on Bimini Dr and turn right onto Harbour Dr. Home is on the left.
  • Direction Faces: East

Community

  • Community Name: 33050 - Marathon
  • Pet Restrictions: None

Heating & Cooling

  • Cooling Type: Central Air
  • Heating Type: Central, Electric

Utilities

  • Sewer: Public Sewer
  • Water: Public
  • Utility Description: BB/HS Internet Available, Cable Connected, Electricity Connected, Public, Sewer Connected, Underground Utilities, Water Connected

Structural Information

  • Exterior Const.: Block
  • Roof: Metal
  • Windows: Shades, Window Treatments
  • Drive-In Doors: Sliding Doors
  • Stories/Levels: Two
  • Square Feet: 2,620
  • Sq. Ft. Source: Public Records
  • Year Built: 1985

Lot Features

  • Property View: Water
  • Lot Size (Acres): 0.28
  • Lot Size (Sq. Ft.): 12,197
  • Lot Size: 12197
  • Street/Road Desc.: Paved

Water Features

  • Water Front: Yes
  • Water View: Yes
  • Water Access: Yes
  • Water Access Desc: Gulf/Ocean to Bay
  • Water Extras: Yes
  • Water Front Desc.: Gulf/Ocean to Bay

Financial Considerations

  • Tax Amount: $20,458.36
  • Tax Year: 2025

Disclosures and Reports

  • Ownership: Fee Simple
  • Special Conditions: None
  • Legal Description: LTS 11 & 11A AMENDED PLAT HARBOUR ISLAND DUCK KEY PB6-84 OR576-344 OR578-572 OR795-344 OR1772-1236
  • Flood Zone Info: AE
  • APN: 376951001100
  • Property ID: 376951001100
  • Block/Lot/Section: PB6-84

Listed by The High Tide Group

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— 422 Harbour Dr —

  • The High Tide Group

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with our affiliated lender
NMLS#: 1598647

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Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

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Schools serving 422 Harbour Dr

School District:Monroe County School District, Middle Torch Key, FL
NameGradesDistance
Stanley Switlik Elementary School
3400 Overseas Highway, Marathon, FL 33050
PK-511.6 mi
Marathon School
350 Sombrero Beach Road, Marathon, FL 33050
6-1210.8 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 422 Harbour Dr Get Price Alerts and Save Property

Date
Details
Price
Change
Source
10/14/2026
Listed
$4,500,000
405.62%
MLS
4/01/2002
Sold
$890,000
—
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 422 Harbour Dr

Year
Property Taxes
Change
Tax Assessment
Change
2024
$19,641
—
$2,658,884
—
2024
$19,641
1%
$2,664,356
-10%
2023
$19,470
38%
$2,948,574
111%
2021
$14,118
-12%
$1,395,949
-31%
2022
$15,986
13%
$2,034,999
66%
2021
$14,118
11%
$1,227,584
2%
2019
$12,723
4%
$1,204,407
6%
2018
$12,265
8%
$1,133,635
-9%
2017
$11,358
7%
$1,240,717
13%
2016
$10,582
2%
$1,099,455
29%
2015
$10,383
11%
$851,717
10%
2014
$9,388
10%
$774,289
11%
2013
$8,540
—
$695,990
—
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.

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NMLS#: 1598647

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Listed by The High Tide Group

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422 Harbour Drive, Duck Key, FL 33050 (MLS# NS1089477) is a Single Family property with 4 bedrooms and 3 full bathrooms. 422 Harbour Drive is currently listed for $4,500,000 and was received on October 14, 2026. Want to learn more about 422 Harbour Drive? Do you have questions about finding other Single Family real estate for sale in Duck Key? You can browse all Duck Key real estate or contact a Coldwell Banker agent to request more information.

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