A Truly Rare Waterfront Estate in Key Colony Beach -- Privacy, Scale, and Turnkey PerfectionPerfectly centered on two full lots, this exceptional Key Colony Beach residence offers a rare level of privacy and space paired with 165 feet of deep-water canal frontage & premier boating access.Fully renovated in 2024, the two-story home is thoughtfully designed for entertaining, guest comfort & everyday coastal living. The first floor serves as a private guest and recreation level, featuring a large bedroom & a spacious nearby full bathroom with double vanities & a separate shower and toilet room. A comfortable TV and lounge area is complemented by a bar, refrigerator, & game table, creating an ideal space for relaxing or hosting guests. This level also includes a one-car garage, a dedicated half-garage for bikes and gear, air-conditioned storage ideal for dive or fishing equipment, & a rare full-length pass-through garage connecting the front of the home directly to the waterfront, with a golf-cart-sized rear garage door providing seamless dock access.The second floor is the main living level & showcases an expansive open-concept kitchen, great room, and oversized dining area with seating for twelve. Filled with natural light, the space is equally suited for large gatherings or relaxed everyday living. The chef's kitchen features premium cabinetry, high-end appliances, and a generous island. Four additional bedrooms are located on this level each with its own en-suite bathroom. The primary suite includes a private balcony, walk-in closet, double vanity, private water closet, and spa-style shower, with a generously sized laundry room also located on this level.Outdoor living defines the property, with two boat lifts rated for 24K & 15K pounds, quick access to both the ocean and Gulf, and a completely remodeled heated saltwater pool surrounded by expansive covered and open patio areas. The east-facing rear exposure offers beautiful morning light & shaded afternoons
For sale
Price cut: $405K (3/18)
$3,995,000
360 12th St, Marathon, FL 33051
5beds
3,578sqft
Est.:
Single Family Residence
Built in 1977
0.42 Acres Lot
$3,638,800 Zestimate®
$1,117/sqft
$-- HOA
What's special
Waterfront estateOne-car garageGenerous islandLarge bedroomTwo full lotsGenerously sized laundry roomGreat room
- 121 days |
- 473 |
- 18 |
Zillow last checked: 7 hours ago
Listing updated: March 17, 2026 at 01:30pm
Listed by:
Jessica Borraccino 305-619-2648,
Coldwell Banker Schmitt Real Estate Co.
Source: FLKMLS,MLS#: 617684
Originating MLS: Marathon/Lower Keys
Tour with a local agent
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 5
- Bathrooms: 6
- Full bathrooms: 5
- 1/2 bathrooms: 1
Cooling
- Central Air, Ceiling Fans(s)
Appliances
- Included: Washer, Microwave, Oven, Range, Refrigerator, Dishwasher, Dryer
Features
- Wet Bar, Storage, Walk-In Closet(s), Pantry, Split Bedroom
- Doors: Impact Rstnce Doors
- Windows: Impact Rstnce Window
Interior area
- Total interior livable area: 3,578 sqft
Property
Parking
- Parking features: Garage, Trailer Storage, Off Street
- Has garage: Yes
Features
- Levels: Two
- Stories: 2
- Patio & porch: Open Porch/Balcony
- Exterior features: Bar, Storage, Outdoor Kitchen, Lighting
- Has private pool: Yes
- Pool features: Heated, In Ground, Concrete
- Fencing: Fenced
- Has view: Yes
- View description: Canal
- Has water view: Yes
- Water view: Canal
- Waterfront features: Canal Front, Waterfront, Dock: Concrete, Dock Length: 165, Dockage: Boat Lift
Lot
- Size: 0.42 Acres
- Features: More than 1 Lot
Details
- Parcel number: 00077580000000
- Zoning: R-1A
- Zoning description: Key Colony Single Family
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Materials
- Combo Construction
- Roof: Metal
Condition
- Updated/Remodeled
- New construction: No
- Year built: 1977
Utilities & green energy
- Electric: Elect Separate Meter
- Sewer: Public Sewer
- Utilities for property: FKAA, Buyer to Verify
Community & HOA
Community
- Features: Tennis Court(s), Bike Paths, Airport/Runway, Beach
- Security: Patrolled Area
- Subdivision: Key Colony Bch 2nd Addn (53.5)
HOA
- Has HOA: No
- Services included: None
Location
- Region: Marathon
Financial & listing details
- Price per square foot: $1,117/sqft
- Tax assessed value: $2,786,460
- Annual tax amount: $19,336
- Date on market: 12/12/2025
- Listing terms: Cash,Conventional
Estimated market value
$3,638,800
$3.46M - $3.82M
$7,940/mo
Price history
Price history
| Date | Event | Price |
|---|---|---|
| 3/18/2026 | Price change | $3,995,000-9.2%$1,117/sqft |
Source: | ||
| 12/12/2025 | Listed for sale | $4,400,000+76%$1,230/sqft |
Source: | ||
| 8/25/2022 | Sold | $2,500,000-23.1%$699/sqft |
Source: | ||
| 8/2/2022 | Pending sale | $3,250,000$908/sqft |
Source: | ||
| 7/21/2022 | Contingent | $3,250,000$908/sqft |
Source: | ||
| 7/19/2022 | Price change | $3,250,000-7.1%$908/sqft |
Source: | ||
| 5/4/2022 | Listed for sale | $3,500,000+84.2%$978/sqft |
Source: | ||
| 8/11/2004 | Sold | $1,900,000$531/sqft |
Source: Public Record Report a problem | ||
Public tax history
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $22,594 +16.8% | $2,194,085 +11.2% |
| 2024 | $19,336 -13.7% | $1,973,111 -13.2% |
| 2023 | $22,397 +147.6% | $2,273,544 +142.8% |
| 2022 | $9,045 -1.1% | $936,509 +3% |
| 2021 | $9,147 +4.9% | $909,233 +1.4% |
| 2020 | $8,723 | $896,680 +2.3% |
| 2019 | $8,723 +2.2% | $876,521 +1.9% |
| 2018 | $8,534 +5.8% | $860,178 +3.2% |
| 2017 | $8,063 +5.7% | $833,182 +2.1% |
| 2016 | $7,628 -2% | $816,046 +0.7% |
| 2015 | $7,783 | $810,373 |
Find assessor info on the county website
Monthly payment
Est. payment
$22,813/mo
Principal & interest
$20083
Property taxes
$2730
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Climate risks
Neighborhood: 33051
Nearby schools
GreatSchools rating
- 4/10Stanley Switlik Elementary SchoolGrades: PK-5Distance: 4.4 mi
- 5/10Marathon SchoolGrades: 6-12Distance: 3.5 mi
Local experts in 33051
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- Key Colony Beach
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- 360 12th St
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