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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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© 2026 Miami Association of REALTORS®. IDX information provided exclusively for personal, non-commercial use. Listing data last updated every 30 minutes.

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+20

3742 Seagrape St

Big Pine, FL, 33043

Active

$5,390,000

3742 Seagrape St

Big Pine, FL, 33043

Active

$5,390,000

3

Bedrooms

3

Bathrooms

4,687 sqft

Living Area

2014

Year Built

Mortgage Calculator

Estimate your monthly payment for this waterfront property

20%

$1,078,000 down

%
Principal & Interest$27,968/mo
Property Tax (est. ~1.2%, varies by county)$5,390/mo
Home Insurance (est.)$250/mo
Total Monthly Payment$33,608
Loan Amount: $4,312,000Rate: 6.75%
Get Pre-Qualified

Estimated payments only. Actual rates and terms may vary.

Comparable Sales

$5,390,000Tour 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.

17,260

Lot Size (sqft)

366

Days on Market

Dock Score™

DockOnly
87
Excellent

What shaped this score

✓Ocean Access
✓Dock with boat lift
✓Bridge-free to bay
✓Fits boats up to ~30ft (est.)

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

Dock & Water AccessMLS

Ocean AccessCanal Width 81-120 FeetSeawall

AI Aerial Imagery Detection

Dock DetectedBoat Lift 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
225ft
dock225 ft225.4221225

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 56 ft

Easy
handling

56–75 ft

Fits
with care

75–86 ft

Tight
(back-in)

Boats over 86 ft can't turn around here — back in/out only. Clear channel ≈ 113 ft once boats are docked both sides (Monroe rules cap each side ~56 ft). Wide-beam yachts need the upper end of each range.

Canal WidthMLS

From MLS

Broker-tagged range
81–120 ft

No public SFWMD polygon at this location. Range is broker-tagged — verify with the listing agent.

Will it turn around?

Up to 20 ft

Easy
handling

20–27 ft

Fits
with care

27–31 ft

Tight
(back-in)

Boats over 31 ft can't turn around here — back in/out only. Clear channel ≈ 41 ft once boats are docked both sides (Monroe rules cap each side ~20 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

Escape to “The Castle”, a luxurious gated Gulf-front estate spanning 1.14 acres on Big Pine Key. Built in 2014 with poured concrete, impact windows/doors, elevator, and generator, this 4,600+ sq. ft. masterpiece offers 3 bedrooms, 3 baths, and breathtaking Gulf views. Boaters enjoy 235’ of dockage: 140’ protected canal dock with lift, ramp, and slip, plus 95’ open-water pier dock with lift and seawall. Inside, a chef’s kitchen with 10.5’ island, dual sinks, Jenn-Air gas range, and wood cabinetry flows to a grand family room, theater, and rooftop deck. The top-floor primary suite boasts water views, office, lounge, spa bath, and custom closet. Outside, a resort-style pool with spa, heater/chiller, and LED lighting completes this rare Florida Keys retreat.

Schedule a Showing

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

Select a date

Location

Big Pine, FL, 33043

No price history available for this property.

Listing courtesy of Ocean Sotheby's International

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
87
Excellent

What shaped this score

✓Ocean Access
✓Dock with boat lift
✓Bridge-free to bay
✓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 VE
BFE: 11ft

Coastal High Hazard

View FEMA Flood Map →
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