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3 Beds
3 Baths
4,687 sqft

$4,650,000

3742 Seagrape Street, Big Pine Key FL, 33043

Price per sqft$992.11
Built in2014
Property size4,687 sqft
Property typeResidential

Overview

Active

Listed Sep 12, 2025

Updated 2 weeks ago

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.

$30,937/mo

Est. mortgage payment based on a $4,650,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
A11877495

Interior Features

Bedrooms
3
Bathrooms
3
Cooling
Yes
Heating
Yes
Basement
No

Exterior Features

Lot Size
0.4 Acres

Other Property Details

Taxes
$28,079
Tax Frequency
Annually
Garage
Yes
View
Yes
Pets Allowed
Yes
Pool
Yes
Waterfront
Yes
55+/Senior Community
No

Listed with Ocean Sotheby's International

All listings featuring the BMLS logo are provided by Association of Palm Beaches. This information is not verified for authenticity or accuracy and is not guaranteed. IDX information is provided exclusively for consumers’ personal, non-commercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing, and that the data is deemed reliable but is not guaranteed accurate by MLS.

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Data last updated 11:59 AM UTC, 9/23/2026

 

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