This exceptional waterfront residence in Key Colony Beach offers the perfect blend of refined comfort, thoughtful design, and effortless island living. Lovingly owned, gently used, and never rented, the home reflects true pride of ownership throughout. An elevator, updated kitchen, and custom baths set the stage, while soaring wood ceilings and an open-concept kitchen, dining, and living area create a light-filled space that flows seamlessly through stackable sliders to a spacious screened porch ideal for entertaining or unwinding in the coastal breeze. The generous primary suite is a private retreat with porch access and a skylit spa-style bath featuring a jetted tub, walk-in tiled shower, and dual vanities. The lower level is designed for true indoor-outdoor living, featuring an custom, inground swimming pool surrounded by elegant marble decking, along with expansive covered and uncovered paved patios. Mature tropical landscaping enhances privacy, while ample covered and uncovered parking adds everyday convenience. Boaters will love the 37.5 foot dock with 15k boat lift, located on a wide, deep canal with quick, easy access, just minutes to both the open ocean and the Gulf via Vaca Cut. A permitted third full bathroom on the lower level sits next to a large air-conditioned storage area with sliders directly to the patio and dock, making it ideal as an angler's room for fishing gear and water toys. Key Colony Beach is one of the Florida Keys most desirable island communities, known for its wide, walkable streets, city-maintained infrastructure, and relaxed coastal charm. Residents enjoy access to marinas, a nine-hole golf course, tennis and pickleball courts, playgrounds, dining, and waterfront Sunset Park all just steps or a short bike ride away. Perfectly positioned in the Middle Keys, Key Colony Beach offers a rare combination of small-town island living, world class boating, and easy access to Marathon's shopping, dining, and local airport.
For sale
Price cut: $95K (6/10)
$1,300,000
651 9th St, Key Colony Beach, FL 33051
2beds
1,176sqft
Half Duplex, Single Family Residence
Built in 1989
4,356 Square Feet Lot
$1,244,400 Zestimate®
$1,105/sqft
$-- HOA
What's special
Exceptional waterfront residenceSoaring wood ceilingsLight-filled spaceUpdated kitchenStackable slidersCustom baths
- 146 days |
- 813 |
- 26 |
Zillow last checked:
Listing updated:
Listed by:
Karen D Raspe 305-393-9010,
Ocean Sotheby's International,
Jo Ann Cook 305-360-7968,
Ocean Sotheby's International
Source: FLKMLS,MLS#: 618394
Originating MLS: Marathon/Lower Keys
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Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 2
- Bathrooms: 3
- Full bathrooms: 3
Heating
- Central
Cooling
- Central Air, Ceiling Fans(s)
Appliances
- Included: Washer, Stainless Steel Appliance(s), Disposal, Microwave, Range, Refrigerator, Dishwasher, Dryer
Features
- Built-in Cabinets, Whirlpool Bath Tub, Walk-In Closet(s), Storage, Elevator, Dade County Pine, Granite Counters, Split Bedroom, Cathedral Ceiling(s)
- Flooring: Tile
- Doors: Sliding Glass Doors
- Windows: Drapes/Blinds Incl, Window Treatments, Single Hung Windows, Accordion
Interior area
- Total interior livable area: 1,176 sqft
Video & virtual tour
Property
Parking
- Parking features: Carport, RV Parking Open, Covered, Trailer Storage, Off Street, Guest
- Has carport: Yes
- Has uncovered spaces: Yes
Features
- Patio & porch: Open Porch/Balcony, Screened P/B
- Exterior features: Lighting
- Has private pool: Yes
- Pool features: Heated, In Ground, Decked
- Fencing: Fenced
- Has view: Yes
- View description: Canal
- Has water view: Yes
- Water view: Canal
- Waterfront features: Canal Front, Waterfront, Seawall: Concrete, Dock: Wood, Dock Length: 37, Dockage: Boat Lift
Lot
- Size: 4,356 Square Feet
- Dimensions: 37.5 x 110
- Features: Less Than 1/4 Acre
Details
- Parcel number: 00075730000000
- Zoning: R-2A
- Zoning description: Key Colony Two Family
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Half Duplex, Single Family Residence
- Attached to another structure: Yes
Materials
- CBS
- Roof: Metal
Condition
- Year built: 1989
Utilities & green energy
- Electric: Elect Separate Meter
- Sewer: Community Swr Plant, Public Sewer
- Water: Water Separate Meter
- Utilities for property: FKAA, Cable Available, Buyer to Verify, Cable Connected
Community & HOA
Community
- Features: Tennis Court(s), Bike Paths, Airport/Runway, Beach
- Security: Smoke Detector(s), Patrolled Area
- Subdivision: Key Colony Bch 1st Addn Amd Plat (53.5)
HOA
- Has HOA: No
- Services included: None
Location
- Region: Key Colony Beach
Financial & listing details
- Price per square foot: $1,105/sqft
- Tax assessed value: $972,572
- Annual tax amount: $9,607
- Date on market: 1/30/2026
Estimated market value
$1,244,400
$1.18M - $1.31M
$4,637/mo
Price history
| Date | Event | Price |
|---|---|---|
| 6/10/2026 | Price change | $1,300,000-6.8%$1,105/sqft |
Source: | ||
| 4/6/2026 | Price change | $1,395,000-6.7%$1,186/sqft |
Source: | ||
| 1/30/2026 | Listed for sale | $1,495,000+35.9%$1,271/sqft |
Source: | ||
| 7/7/2022 | Sold | $1,100,000$935/sqft |
Source: | ||
| 6/23/2022 | Pending sale | $1,100,000$935/sqft |
Source: | ||
| 6/10/2022 | Listed for sale | $1,100,000+411.6%$935/sqft |
Source: | ||
| 3/9/1994 | Sold | $215,000$183/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $9,607 -3.9% | $972,572 -1.5% |
| 2024 | $9,993 +4.1% | $987,672 +4.7% |
| 2023 | $9,599 +46.4% | $943,390 +57.5% |
| 2022 | $6,557 +10.2% | $598,827 +10% |
| 2021 | $5,949 +13.4% | $544,388 +10% |
| 2020 | $5,246 | $494,898 -1.1% |
| 2019 | $5,246 -1.1% | $500,585 +11.3% |
| 2018 | $5,302 +14.5% | $449,608 +1.4% |
| 2017 | $4,632 +3.7% | $443,535 +0.5% |
| 2016 | $4,468 -0.4% | $441,132 +16% |
| 2015 | $4,486 | $380,165 |
Find assessor info on the county website
Monthly payment
Est. payment$--/mo
Payment breakdown
Explore the cost of this home by adjusting the details. Changes won't be saved.All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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Climate risks
Neighborhood: 33051
Nearby schools
GreatSchools rating
- 5/10Stanley Switlik Elementary SchoolGrades: PK-5Distance: 4.6 mi
- 5/10Marathon SchoolGrades: 6-12Distance: 3.7 mi
A local agent can set up tours, give advice and negotiate with sellers.
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