Discover exceptional waterfront living in the heart of Key Colony Beach. This concrete constructed half duplex offers over 2,100 square feet with three bedrooms, three bathrooms inside and 37.5 feet of dockage. A rare and highly desirable interior staircase welcomes you from the above flood first floor, seamlessly connecting both levels of the home. Downstairs is completely built above flood and features a one bedroom, one bathroom suite with additional living area, ideal for guests or extended family. Step through sliding glass doors to a spacious wood deck and 37.5 feet of dockage. Enjoy the ocean breeze and shade under the lush buttonwood tree. Upstairs, enjoy open concept living with a bright and airy kitchen, dining, and living area designed for effortless entertaining. The primary suite boasts a recently renovated bathroom with step-in tiled shower, quartz topped double vanity and tiled flooring. Nearby, a second guest bedroom offers its own ensuite for added comfort and privacy. Recent updates include a newer AC, 2018 standing seam metal roof, and termite tenting with a transferable warranty, providing peace of mind for years to come. With its rare downstairs living, expansive square footage, and thoughtfully designed layout, this property presents a unique opportunity to own a well-cared-for waterfront residence in one of the most desirable areas of the Florida Keys. Key Colony Beach welcomes primary and seasonal guests with the 9-hole par 3 golf course, tennis and pickle ball courts, Sunset Park, City Hall, police department, multiple restaurants, boat ramp and marina. Enjoy the island lifestyle with amenities galore!
For sale
$1,185,000
391 10th St, Key Colony Beach, FL 33051
3beds
2,166sqft
Half Duplex
Built in 1988
4,356 Square Feet Lot
$1,127,200 Zestimate®
$547/sqft
$-- HOA
What's special
Three bathroomsThree bedroomsLush buttonwood treeOpen concept livingBright and airy kitchenTiled flooringStep-in tiled shower
- 37 days
- 369
- 19
Zillow last checked:
Listing updated:
Listed by:
Jo Ann Cook 305-360-7968,
Ocean Sotheby's International,
Ally Kelley 727-459-0493,
Ocean Sotheby's International
Source: FLKMLS,MLS#: 621529
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 3
- Bathrooms: 3
- Full bathrooms: 3
Cooling
- Central Air, Ceiling Fans(s)
Appliances
- Included: Washer, Dryer, Dishwasher, Refrigerator, Oven, Microwave, Disposal, Stainless Steel Appliance(s)
Features
- Storage, Quartz Countertops
- Flooring: Tile, Laminate
- Windows: Casement
Interior area
- Total structure area: 2,166
- Total interior livable area: 2,166 sqft
Property
Parking
- Parking features: Open, Storage
- Has uncovered spaces: Yes
Features
- Patio & porch: Open Porch/Balcony, Deck
- On waterfront: Yes
Lot
- Size: 4,356 Square Feet
Details
- Parcel number: 00076300000000
- Zoning: R-2A - Key Colony Two Family
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Half Duplex
Materials
- CBS, Concrete
Condition
- Year built: 1988
Utilities & green energy
- Utilities for property: Elect Separate Meter, Cable Available
Community & HOA
Community
- Features: Community Boat Ramp, Bike Paths
- Security: Security Guard
- 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: $547/sqft
- Tax assessed value: $1,017,107
- Annual tax amount: $6,525
- Date on market: 10/7/2026
- Listing terms: No Seller Finance,Cash,Conventional
Estimated market value
$1,127,200
$1.07M - $1.18M
$5,813/mo
Price history
| Date | Event | Price |
|---|---|---|
| 10/7/2026 | Listed for sale | $1,185,000$547/sqft |
Source: | ||
| 9/18/2026 | Listing removed | $1,185,000$547/sqft |
Source: | ||
| 8/21/2026 | Price change | $1,185,000-3.3%$547/sqft |
Source: | ||
| 6/29/2026 | Price change | $1,225,000-3.9%$566/sqft |
Source: | ||
| 5/13/2026 | Price change | $1,275,000-2.7%$589/sqft |
Source: | ||
| 4/2/2026 | Listed for sale | $1,310,000+191.8%$605/sqft |
Source: | ||
| 6/28/2012 | Sold | $449,000-35.8%$207/sqft |
Source: | ||
| 8/4/2010 | Listing removed | $699,000$323/sqft |
Source: Coldwell Banker Schmitt Real Estate Co. #548025 Report a problem | ||
| 3/1/2009 | Listed for sale | $699,000$323/sqft |
Source: Coldwell Banker Schmitt Real Estate Co. #548025 Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $6,525 +0.5% | $680,158 +2.9% |
| 2024 | $6,493 +3.3% | $660,990 +3% |
| 2023 | $6,288 +3.9% | $641,738 +3% |
| 2022 | $6,054 -0.8% | $623,047 +3% |
| 2021 | $6,105 +4.7% | $604,900 +8.9% |
| 2020 | $5,832 | $555,612 -2.7% |
| 2019 | $5,832 -2.5% | $570,881 +5.8% |
| 2018 | $5,981 +9.4% | $539,659 -1.4% |
| 2017 | $5,468 +1.1% | $547,293 -0.8% |
| 2016 | $5,407 -2.1% | $551,537 +13.9% |
| 2015 | $5,523 | $484,297 |
Find assessor info on the county website
Monthly payment
Est. payment




