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Single family home for sale at 3742 Seagrape St, Big Pine Key, FL 33043 | MLS# A11877495 | Listing updated on 2026-10-31
Photo 1 of Single family home for sale at 3742 Seagrape St, Big Pine Key, FL 33043 | MLS# A11877495 | Listing updated on 2026-10-31
Photo 2 of Single family home for sale at 3742 Seagrape St, Big Pine Key, FL 33043 | MLS# A11877495 | Listing updated on 2026-10-31
Photo 3 of Single family home for sale at 3742 Seagrape St, Big Pine Key, FL 33043 | MLS# A11877495 | Listing updated on 2026-10-31
Photo 4 of Single family home for sale at 3742 Seagrape St, Big Pine Key, FL 33043 | MLS# A11877495 | Listing updated on 2026-10-31
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$4,650,000

Monthly Est:$23,145

  • Beds Icon3 Beds
  • Beds Icon
    3 Baths
  • Beds Icon4,687sqft

3742 Seagrape St, Big Pine Key, FL 33043

$23,145/moEst:

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  • Single Family Residence

  • Built in 2014

  • $-- HOA

  • 17,424 sqft lot

  • $992/sq.ft

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.

  • Houzeo last checked: 1 hour ago
  • Listing updated: October 31, 2026 at 12:19 am
  • Listing Provided by: Jo Ann Cook DRE #3330898 | Ocean Sotheby's International (305) 735-4095
  • Source: Beaches MLS-FL | MLS#: A11877495 Beaches MLS-FL

Property Details

  • Status

    Active

  • Type

    Single Family Residence

  • No. of Stories

    2

  • County

    Monroe County

  • City

    Big Pine Key

  • Neighborhood

    --

  • Year Built

    2014

  • HOA Fees

    -

  • Finished Area

    4,687 sqft

  • Lot Size

    17,424 sqft lot

  • Basement Area

    - sqft

  • MLS Name

    Beaches MLS

  • MLS Number

    A11877495

  • MLS Status

    Active

  • Days on Market

    417

  • Cumulative Days on Market

    550

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Location

Facts & Features

Rooms

  • Bedrooms & bathrooms

    Bedrooms: 3

    Bathrooms: 3

Interior

  • Exterior Features

    Balcony, Lighting, Outdoor Living Area

  • Appliances

    Dishwasher, Electric Water Heater, Disposal, Microwave

  • Cooling

    Central Air

  • Flooring

    Tile

  • Sewer

    Public Sewer

  • Interior Features

    Built In Features, Bathtub, Closet Cabinetry, Elevator, Kitchen Island, Main Level Primary, Multiple En Suite Bathrooms, Soaking Tub, Separate Shower, Upper Level Primary

  • Heating

    Central

Construction

  • Year Built

    Year Built: 2014

  • Home type

    Single Family Residence

  • Roof

    Concrete

  • Construction Materials

    Cbs Concrete Block Structure, Block

Utilities & Energy

  • Parking Features

    Attached Carport, Circular Driveway, Covered, Carport, Driveway, Golf Cart Garage, Guest, Paver Block

  • Utilities

    Cable Available

  • Association Amenities

    None

  • Pool Features

    Concrete, Heated, In Ground

  • Water Source

    Public

Other Features

  • Patio And Porch Features

    Open, Balcony

  • Subdivision Name

    Port Pine Heights 2nd Add

  • Lot Features

    One To Two Acres

Price History

DateEventPrice

08/09/2026

Source: mls_logoBeaches MLS-FL #A11877495

Off Market

$4,650,000

$992/sqft

08/09/2026

Source: mls_logoBeaches MLS-FL #A11877495

Listed for Sale

$4,650,000 -13.73%

$992/sqft

03/03/2026

Source: #A11877495

Price Decreased

$5,390,000 -8.64%

$1,150/sqft

02/02/2026

Source: #A11877495

Price Decreased

$5,900,000 -8.53%

$1,259/sqft

09/12/2025

Source: #A11877495

Listed for Sale

$6,450,000 +19.67%

$1,376/sqft

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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 BeachesMLS. All listings featuring the BMLS logo are provided by BeachesMLS, Inc. This data is not verified for authenticity or accuracy and may not reflect all real estate activity in the market. Based on information © 2026 BeachesMLS, Inc. All Rights Reserved.

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