3742 Seagrape St, Big Pine, FL 33043 - Photo 1

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$6,450,000

For Sale
Active
Single Family
3 Beds
3 Full Baths
4,687 Sq. Ft.

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Property 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.

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Full Property Details

Full Property Details for 3742 Sea Grape St

General

Price: $6,450,000
Taxes: $28,079 (2024)
Status: Active
Type: Single Family
Source: Greater_Miami
MLS ID: A11877495
Updated: 9/12/2025
Added to Site: 264 day(s) ago

Interior

Interior Features: Second Floor Entry, Built-in Features, Closet Cabinetry, Cooking Island, Elevator, Family Room, Media Room, Utility Room/Laundry
Appliances: Dishwasher, Disposal, Electric Water Heater, Microwave
Furnishings: Furniture For Sale
Flooring: Tile

Rooms

Bathrooms

Total Bathrooms: 3
Full Bathrooms: 3
Primary Bathroom: 2 Primary Bathrooms

Bedrooms

Total Bedrooms: 3
Bedroom Features: Primary Bath Shower, Primary Bath Tub, Primary Bedroom Ground Level, Primary Bedroom Upstairs

Other Rooms

Living Room: Family Room, Media Room, Ut Sq. Ft.
Laundry: Utility Room/Laundry

Additional Information

Pool: Yes
Pool Description: In Ground, Concrete, Heated, 30
Spa: Yes
Equipment: Elevator

Exterior

Exterior Features: Lighting, Open Balcony
Deck/Patio: Open Balcony

Parking

Garage: Yes
Garage Spaces: 4
Carports: Yes
Carport Spaces: 4
Covered Spaces: 8
Parking Features: Attached Carport, Additional Spaces Available, Circular Driveway, Covered, Driveway, Golf Cart Parking, Guest, Other, Paver Block

Location

Area: Port Pine Heights 2nd Add
County: Monroe County
Subdivision: PORT PINE HEIGHTS 2ND ADD
Building Name: PORT PINE HEIGHTS 2ND ADD
Driving Directions: From US-1, right on Key Deer Blvd all the way to Kyle Blvd, left onto Kyle, left onto Sea Grape Street. Property is on right side with gated entry.
Direction Faces: North

Community

Community Name: Port Pine Heights 2nd Add
Pets Allowed: Yes

Heating & Cooling

Air Conditioning: Yes
Cooling Type: Central Air
Heating Type: Central

Utilities

Sewer: Public Sewer
Water: Municipal Water

Structural Information

Architectural Style: Detached, Two Story
Structure Type: House
Detached/Attached: Detached
Construction: Concrete Block Construction, CBS Construction, Elevated Construction
Roof: Concrete
Windows: Clear Impact Glass
Doors: High Impact Doors
Square Feet: 4,687
Living Area: 4,687 Sq. Ft.
Year Built: 2014

Lot Features

Property View: Bay, Water
Lot Size (Sq. Ft.): 17,260
Frontage: Bay
Frontage Feet: 300
Lot Features: 1 To Less Than 2 Acre Lot
Zoning: SF

Water Features

Water Front: Yes
Water View: Yes
Water Front Desc.: Ocean Access, Canal Width 81-120 Feet, Seawall

Financial Considerations

Price Per Sq. Ft.: $1,376.15
Tax Amount: $28,079
Tax Year: 2024
Terms: All Cash, Conventional

Disclosures and Reports

Legal Description: BK 77 LOTS 3 AND 4 PORT PINE HEIGHTS 2ND ADD BIG PINE KEY PB4-167 AND ADJ FILL BAY BTM OR376-233 OR517-179 OR555-195D/C OR872-1053/1057 OR12
Restrictions: No Restrictions
Inclusions: Boatlift, Private Dock
Property ID: 00297040-000000

Listed by Ocean Sotheby's International

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Schools

Schools serving 3742 Sea Grape St

School District:Monroe County School District, Middle Torch Key, FL

Name	Grades	Distance
Sugarloaf School 255 Crane Boulevard, Summerland Key, FL 33042	PK-8	9.2 mi
Marathon School 350 Sombrero Beach Road, Marathon, FL 33050	6-12	20.3 mi

Disclaimer: School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 3742 Sea Grape St Get Price Alerts and Save Property

Date

Details

Price

Change

Source

4/28/2025

Listed

$6,450,000

122.41%

MLS

2/01/2019

Sold

$2,900,000

—

Public Record

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Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History

Tax History for 3742 Sea Grape St

Year

Property Taxes

Change

Tax Assessment

Change

2024

$25,730

—

$3,301,091

—

2024

$25,730

9%

$3,292,836

8%

2023

$23,601

20%

$3,036,096

46%

2021

$19,742

-8%

$2,085,231

-23%

2022

$21,448

9%

$2,707,955

30%

2021

$19,742

7%

$2,076,078

6%

2019

$18,494

-1%

$1,960,891

2%

2018

$18,669

—

$1,924,329

-1%

2017

$18,617

14%

$1,934,751

18%

2016

$16,300

14%

$1,643,627

25%

2015

$14,306

383%

$1,313,646

517%

2014

$2,963

-45%

$212,810

-50%

2013

$5,373

—

$427,035

—

View All

Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost

Estimate the Cost for 3742 Sea Grape St

3742 Seagrape St, Big Pine, FL 33043 (MLS# A11877495) is a Single Family property with 3 bedrooms and 3 full bathrooms. 3742 Seagrape St is currently listed for $6,450,000 and was received on April 28, 2025. Want to learn more about 3742 Seagrape St? Do you have questions about finding other Single Family real estate for sale in Big Pine? You can browse all Big Pine real estate or contact a Coldwell Banker agent to request more information.

3742 Sea Grape St Big Pine, FL 33043