Opportunities like this one on the St Johns River are extremely rare and this nearly 3 acre private estate with over 300 feet of direct river frontage in the heart of Mandarin truly stands apart. Set behind a gated entry and surrounded by mature landscaping, this incredible private estate offers a unique combination of land, water, and flexibility that is increasingly difficult to find in today's market. The main residence offers approximately 4,846 square feet of thoughtfully designed living space with 4 Bedrooms and 5 1/2 Baths, centered around a functional winged layout that provides both privacy and flow. Multiple gathering areas are ideal for entertaining, including a spacious family room with a bar, a dedicated wine room, and expansive living areas that open to the outdoors. Timeless architectural details and custom craftsmanship are evident throughout, adding warmth and character to the home. Additional main-level living includes a guest suite with a full ensuite bathroom, as well as a conveniently located half-bath for guests. A private office, situated in a separate wing near the garage entry, provides a quiet and functional space for work or study. Upstairs, two oversized bedroom suites each feature their own bathrooms, along with flexible lounge or extended-stay areas that can adapt to a variety of needs. Outdoor living is thoughtfully designed for year-round enjoyment. A pool and spa overlook the river and are perfectly positioned to capture sunset views, while the covered lanai offers a comfortable and flexible outdoor environment that seamlessly connects to the interior living spaces. The property is defined by its expansive riverfront presence, featuring a newly installed 300-ft bulkhead and an impressive 515-ft private covered dock featuring a boat lift designed to accommodate vessels up to approximately 30 feet. With direct boating access from your backyard and wide river frontage offering sweeping views, the outdoor setting delivers both functionality and a true waterfront lifestyle. The grounds are equally impressive, with a pavered circular driveway and landscaped roundabout creating a grand arrival, exterior landscape lighting enhancing the evening ambiance, and open green spaces throughout the property providing privacy and room for recreation, entertaining, or future expansion. A significant highlight of the property is the fully independent detached guest residence, offering an additional approximate 2,100 square feet of living space and fully conditioned multipurpose flex space. Designed with flexibility in mind, the guest home includes a full kitchen, living area, 2 Bedrooms with 2 ensuite Bathrooms, and 2 loft spaces. The additional versatile multipurpose area with conditioned climate control allows for use as a workshop, garage, hobby room, art studio, or additional living space. The guest residence also features generous storage including closets and attic space. Designed for true independence, this separate living space offers exceptional flexibility; perfect for multigenerational living, private guest accommodations, or potential income-producing use. RLD-120 zoning further enhances the property with opportunity for additional dwelling units or future expansion (buyer to verify). Infrastructure and systems throughout the property support both comfort and long-term usability. The home is equipped with multiple HVAC systems and multiple water heaters with recent updates, along with updated electrical panels. A public sewer connection is supported by an on-site lift station, and the property is serviced by a private well water system with a water softener. The main residence features a fiberglass lifetime roof, while the guest house roof has been recently replaced. A built-in generator, supported by a dedicated 500-gallon propane system, enhances the guest home with added reliability. The main residence is equally equipped with its own 500-gallon propane tank, providing connections for the hot tub and future outdoor kitchen. The overall setting offers a rare balance of privacy, usability, and future potential. With expansive acreage, wide river frontage, and the flexibility to live as-is, update over time, or reimagine entirely, this property presents a unique opportunity for buyers seeking both lifestyle and long-term value. A property like this isn't replicated - it's secured. Mandarin is one of Jacksonville's most sought-after riverfront communities, known for its mature canopy roads, historic charm, top-rated schools, and convenient access to upscale shopping, dining, golf, waterfront parks, and the St. Johns River. Residents enjoy a rare blend of privacy and connectivity, with proximity to respected public and private schools, higher education institutions, premier healthcare campuses, major business corridors, Jacksonville's international airport, and the vibrant lifestyle destinations throughout Jacksonville and Northeast Florida.