Live in Paradise! Not your average half duplex! Ideal Vacation Rental Property! Sold furnished with Elegant & Sophisticated style and brimming with natural light. This distinctive island residence offers soaring double-height windows, rare architectural design, and thoughtful updates throughout. Highlights:2 Bedrooms / 2 Baths | Over 1,400± SF of living space plus 422 SF A/C finished bonus room + 171 SF A/C shop storage. Up to 12' ceilings and wide-plank flooring throughout, impact rated windows and doors for peace of mind. Custom kitchen with sleek design, premium finishes, and ample storage. Bathrooms updated in 2022 with marble finishes, new vanities, and mirrors. additional 2022 updates: electronic blinds (family rm & master) & new landscaping (front & back)Outdoor Living:Screened balcony off main living area, private primary suite balcony with peek-a-boo ocean view, backyard patio with brand-new pavers connecting front to back. 30ft dock with step-down composite decking — quick 5-minute idle-speed access to open water, 2- min walk to white sand beach! Bonus Spaces:Dedicated laundry room with sink, small office nook and 4X6 composite shed for more storage. SPECIAL OFFER:Seller will include 1-year membership at your choice of GlunzOcean Beach Club or The Cabana Club (just 2 minutes away!) — enjoy premium beach and pool access with none of the maintenance or liability of a private pool. Other Features:Oversized guest bedroom fits a king-size bed easily. Wonderful elegant double-door entry and protected staircase, electric hurricane shutters & transom windows throughout. flexible closings — seller open to offers and can accommodate quick closing. A standout property inside and out — one of the most distinctive half-duplexes on the island. Elegant, upgraded, and move-in ready. Must be seen in person to appreciate its light, layout, and architectural appeal!
Claim this home to receive a free report every month with insights on the changing estimate.
Market trends in Key Colony Beach, FL
Last updated August 2026
Buyer's Market
Seller's Market
Buyer's market
Sale-to-List Price
95.3%
+0.0% MoM
Median sale price
$1.8M
$214K MoM
Avg. days on market
204d
20 days MoM
Recently sold homes
18
3 MoM
Provided by Redfin
Homeowner tools
More resources
View owner dashboard
Track your estimate and nearby sale activity
Edit home facts
Review property details and add renovations
Manage photos
Update home photos or make them private
Rental estimate
Est. $2,211 per month, based on comparable rentals
Sale and tax history for 171 3rd St
Sale History
Tax History
Date
Event
Price
FLKMLS #618337
Apr 1, 2026
Sold
$1,175,000
$820/sq ft
Mar 1, 2026
Contingent
—
Jan 19, 2026
Listed
$1,199,000
$837/sq ft
FLKMLS #614439
Jun 22, 2025
Listing Removed
—
May 18, 2025
Price Changed
$1,295,000
$904/sq ft
Apr 7, 2025
Price Changed
$1,349,000
$941/sq ft
Apr 3, 2025
Listed
$1,449,000
$1,011/sq ft
FLKMLS #601592
Oct 13, 2022
Sold
$1,280,000
$893/sq ft
Aug 10, 2022
Contingent
—
Jun 27, 2022
Listed
$1,299,000
$906/sq ft
+43
Light and airy coastal chic half-duplex just waiting for you to start living the Keys Life. Nothing to be done here, everything has been updated! Two Bedroom/Two Bath in Key Colony Beach featuring 10' ceilings and over 1400sf, this home is spacious and extra bright with an abundance of transom windows. Grand double door entry greets you and your guests, along with a cleverly designed exterior staircase. Custom kitchen, marble finished baths, new hard plank floors throughout, impact windows/doors and new composite step down dock. Nice outdoor space to entertain friends and family with screened balcony off living/dining area and patio with hot tub downstairs. Large master bedroom with private balcony and peek-a-boo ocean view. Oversized guest bedroom, large enough to easily accommodate two queen or 2 sets of bunk beds. Laundry room, plus small office area. Two separate storage areas on lower level – one space at 422sf is air conditioned. The second lower level space at 171sf offers plenty of room for all your fishing tackle and dive equipment. 30' concrete dock, less than 5 minutes at idle speed to open water. Driveway can easily accommodate 5-6 vehicles or RV & Boat Trailer and cars. It's time to start living the Island Life in Key Colony Beach where you can walk or bike the entire city to the marina, golf, tennis, pickle ball, restaurants, post office & Sunset Park.
FLKMLS #591674
Oct 8, 2020
Sold
$730,000
$509/sq ft
Jul 14, 2020
Listed
$749,000
$523/sq ft
FLKMLS #588149
May 15, 2020
Listing Removed
—
Nov 7, 2019
Listed
$749,000
$523/sq ft
FLKMLS #550447
Mar 18, 2010
Sold
$489,900
$342/sq ft
Dec 7, 2009
Listed
$529,000
$369/sq ft
FLKMLS #544991
Jul 22, 2008
Listing Removed
—
Apr 4, 2008
Listed
$695,000
$485/sq ft
FLKMLS #416237
Dec 22, 1999
Listing Removed
—
Oct 7, 1999
Listed
$657,500
$459/sq ft
FLKMLS #413183
Apr 7, 1999
Listing Removed
—
Jan 22, 1999
Listed
$305,000
$213/sq ft
As the MLS and public records start to fill up, we'll list the details here.
Public record
Beds
—
Baths
—
Stories
—
Lot width
—
Lot depth
—
Lot size
—
Year renovated
—
Sq. Ft.
—
Year built
—
Style
Single Family Residential
County
Monroe County
APN
00072700-000100
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jan 29, 2025.
Property details
Parking
Parking / Garage Information
Vehicle Storage: Carport, Trailer Storage, Covered Parking, RV Parking Open, Off Street Parking, Guest Parking, Open Parking
Sq. Ft. Remarks: 1433sf upper living 422sf plus 171sf lower level spaces
Building Style: Stories: 2
Building Style: Above Flood: Yes
Building Style: Stilt Column Height: Medium - 5Ft - 9Ft
Construction: CBS, Concrete
Roof: Metal Roof
Subdivision/Neighborhood
Subdivision: Key Colony Beach (53.5)
Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)
Financial
Tax Information
Taxes: $6,605.60
Tax Year: 2,025
Tax Exemptions: Homestead
Financial Information
Terms: Cash, FHA, VA, Conventional
Utilities
Utility Information
Utilities: FKAA, Water Separate Meter, Elect Separate Meter, Municipal Sewer
Pre-Wired: Cable
Has Public Sewer Hook-up
Location
Multi-Unit Information
# of Total Units: 1
Homeowners Association Information
Association Info: 1st Right of Refusal: No
Association Info: Association Fee $: 0.00
Fee Includes: None
Location Information
Side: Ocean
Mile Marker: 53.50
Directions: Overseas Hwy to Mile Marker 53.5, at light turn onto Sanowski/KCB Causeway, go to end and follow curve to left to E Ocean Dr, thrus left onto 3rd St 171 on left, right side of duplex.
Neighborhood Features
Clubhouse, Bike Paths, Airstrip, Other Area Features, Beach, Tennis Courts
Public facts
Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: —
Style: Single Family Residential
Year Built: —
Year Renovated: —
County: Monroe County
APN: 00072700-000100
Home facts updated by county records on Jan 29, 2025
Around this home
Schools
Stanley Switlik Elementary School
Public PreK-5 • Assigned • 5.0mi
5/10
Marathon School
Public 6-12 • Assigned • 4.2mi
5/10
Provided by GreatSchools
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
Heat Factor
We're working on getting current and accurate heat risk information for this home.
10/10 Wind Factor
99% chance of strong winds in next 30 years
1/10 Air Factor
0 unhealthy days expected this year, 0 days in 30 years
Provided by First Street
Historical weather
Key Colony, FL • 33051
Average low and high temperatures (°F)
73
64
75
68
79
71
81
75
85
79
87
81
88
81
90
82
88
81
84
78
79
73
77
70
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 10 hours in
June and 7.3 hours in December, placing it above the
U.S. average for solar exposure.
10 hrs
7.3 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$1.12M – $1.36M
Sell confidently with a local market expert in Key Colony.