Custom-built riverfront estate on 18.5 acres in the gated Seaside Landings community of Flagler Beach, offering luxury coastal living with no expense spared. This stunning residence features over 6,200 sq ft of living space with 5 bedrooms, 6.5 baths, a 6-car garage, and a massive 65 ft x 42 ft outbuilding perfect for RVs, boats, car collections, or a serious workshop. A separate, detached 32 ft x 26 ft game room serves as a true entertainment pavilion, complete with a wet bar, home theater, and bath, providing guests with their own private retreat away from the main home. Rich wood flooring runs throughout and captures incredible river views from many rooms, including the riverfront dining room, executive office, and inviting living room with double-sided fireplace and custom built-ins. The main level also offers a large utility room, bedroom, and three baths, providing flexible space for multigenerational living or extended-stay guests. The gourmet kitchen impresses with quartz.... countertops, quartz backsplash, and a huge, well-equipped butler's pantry designed for effortless entertaining. Upstairs, the owner's suite is a private sanctuary with sweeping river views and a massive walk-in closet with custom built-ins, while three additional guest bedrooms, all en-suite, ensure comfort and privacy for family and visitors. Outdoor living is resort-caliber, with a covered lanai overlooking the pool and hot tub, summer kitchen, and travertine flooring, plus an additional screened lanai with a fireplace for cozy evenings by the water. The private dock with boat house provides direct access to the Matanzas River and Intracoastal Waterway, ideal for boating, fishing, and paddle sports right from your backyard. Seaside Landings itself is an exclusive, Intracoastal-front, gated community known for its Old Florida ambiance, majestic oaks, and wide canals, offering a peaceful, upscale environment for boaters and nature lovers. Residents enjoy a true coastal lifestyle with direct Intracoastal access, scenic Florida vistas, and an intimate, low-density neighborhood feel, all just minutes from Flagler Beach's shoreline, local restaurants, and A1A, with convenient access to I-95, and multiple nearby airports. An active social environment and community gathering spots along the Intracoastal, including a screened gazebo, fire pit, barbecue area, benches, and kayak rack, further enhance the relaxed yet refined lifestyle that makes Seaside Landings so desirable.