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© 2026 DockOnly™. All rights reserved.

DockOnly™ and Dock Score™ are trademarks of Blue Mar Real Estate Group Inc.

Blue Mar Real Estate Group

Blue Mar Real Estate Group Inc.

Licensed Florida Real Estate Broker

DBPR License CQ1018554

Listing data provided by Miami Realtors MLS via Bridge Data Output. Information deemed reliable but not guaranteed. Dock Score™ is a DockOnly.com rating and is not provided by or affiliated with the MLS or listing broker. NOAA chart data is public domain and for reference only — not for navigation. Full MLS Compliance

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+20

1403 Grouper Dr

Marathon, FL, 33050

Active

$1,074,999

1403 Grouper Dr

Marathon, FL, 33050

Active

$1,074,999

3

Bedrooms

1

Bathrooms

1,892 sqft

Living Area

1962

Year Built

Mortgage Calculator

Estimate your monthly payment for this waterfront property

20%

$215,000 down

%
Principal & Interest$5,578/mo
Property Tax (est. ~1.2%, varies by county)$1,075/mo
Home Insurance (est.)$250/mo
Total Monthly Payment$6,903
Loan Amount: $859,999Rate: 6.75%
Get Pre-Qualified

Estimated payments only. Actual rates and terms may vary.

Comparable Sales

$1,074,999Tour the dockSchedule a Showing
Navigation note: Navigation routes show the shortest mapped path to open water. A vessel taller than the binding bridge clearance may still reach open water via a longer alternate route that we don't currently map — verify navigability with a local captain or surveyor before relying on it.

6,632

Lot Size (sqft)

134

Days on Market

Dock Score™

DockOnly
90
Excellent

What shaped this score

✓Ocean Front
✓Dock present
✓Bridge-free to bay & ocean
✓Fits boats up to ~30ft (est.)

DockOnly.com rating — not provided by the MLS or listing broker.

Dock & Water AccessMLS

WF/Ocean AccessCanal FrontCanalOcean Front📝 deep water

AI Aerial Imagery Detection

Dock DetectedSeawall DetectedDeep Water Indicators~26-35 ft dock

Detected by AI from open-source aerial mapping imagery and may not reflect current conditions. This information was not provided by the MLS or listing broker. Always verify dock infrastructure with the listing agent.

Canal WidthDockOnly

At the dock

County parcel data
135ft
dock135 ft134.8132134

Width sampled every 10 ft from dock · perpendicular measurement

Measured perpendicular from this parcel's waterfront edge to the parcel directly across the canal, using surveyed county GIS boundaries.

Will it turn around?

Up to 33 ft

Easy
handling

33–44 ft

Fits
with care

44–51 ft

Tight
(back-in)

Boats over 51 ft can't turn around here — back in/out only. Clear channel ≈ 67 ft once boats are docked both sides (Monroe rules cap each side ~34 ft). Wide-beam yachts need the upper end of each range.

Navigation RouteDockOnly

Data sources: SFWMD AHED waterway polygons · FHWA National Bridge Inventory 2024 · Not provided by the MLS or listing broker.

Description

Welcome to 1403 Grouper Dr, a true Florida Keys gem located in the heart of Marathon! This charming 3-bedroom, 1-bath home offers everything you need for the ideal Keys lifestyle—whether you're looking for a primary residence, a vacation getaway, or a strong investment opportunity. Enjoy direct ocean access from your private boat dock on a deep-water canal, perfect for boating, fishing, and exploring the world-class waters the Keys are known for. With no HOA, you have the freedom and flexibility to use the property as you choose, including potential short-term rental options. Inside, the home is well-maintained, filled with natural light, and features an upgraded bathroom that adds a modern, comfortable touch. The layout is open and welcoming, creating an ideal space for Keys living. Situated within a Florida Keys wildlife and environmental area, the property benefits from protected land directly in front—ensuring no future construction and preserving your privacy, views, and the natural beauty that surrounds the home. Located just minutes from top dining, beaches, marinas, and favorite local attractions, this home puts the best of Marathon right at your fingertips. Whether you’re seeking coastal living or a high-demand investment property, this Marathon retreat checks all the boxes. Don’t miss out on this rare waterfront opportunity!

Schedule a Showing

See the property and tour the dock. A licensed waterfront specialist will arrange your private showing.

Select a date

Location

Marathon, FL, 33050

No price history available for this property.

Listing courtesy of Lifestyle International Realty

Last updated: 6/16/2026

© 2026 Miami Association of REALTORS®, Inc. All rights reserved. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of the Miami Association of REALTORS®. Information is deemed reliable but not guaranteed. All properties are subject to prior sale, change, or withdrawal.

IDX information is provided exclusively for consumers' personal, non-commercial use. It may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

Dock Score™

DockOnly
90
Excellent

What shaped this score

✓Ocean Front
✓Dock present
✓Bridge-free to bay & ocean
✓Fits boats up to ~30ft (est.)

DockOnly.com rating — not provided by the MLS or listing broker.

Nearest Bridge Clearances

Florida Keys — critical for tall/large vessels

No bridge data available for this location.
FEMA Flood Zone AE
BFE: 8ft

Special Flood Hazard Area

View FEMA Flood Map →
Loading nearby marinas…
Loading nearby sandbars…

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