Tucked away at the northern tip of Marco Island, Key Marco is one of Southwest Florida's most exclusive gated enclaves, renowned for its rare blend of refined coastal living, exceptional marina access, and unspoiled natural beauty. Surrounded by pristine waterways, mangrove preserves, and expansive bay views, this low-density island community offers a level of privacy and tranquility that is increasingly hard to find. A defining highlight of Key Marco is its resident-only deep-water marina, providing direct, no-bridge access to the Gulf of Mexico and quick routes to the Ten Thousand Islands-ideal for boating, fishing, shelling, and effortless days on the water. Residents also enjoy a beautifully appointed clubhouse, fitness center, Har-Tru tennis courts, a heated resort-style pool and spa, and inviting social spaces designed for relaxed coastal living. Nestled on over a half-acre estate lot within this prestigious setting, the residence offers an exceptional combination of privacy, luxury, and value, featuring thoughtful updates including a metal roof (2018), high-efficiency 20-SEER air-conditioning systems (2016-2017), LED recessed lighting, and hickory hardwood flooring throughout the main living areas. The elegant and versatile floor plan includes five bedrooms and four-and-a-half baths, with three spacious en-suite bedrooms, formal living and family rooms ideal for entertaining or quiet retreat, a serene primary suite with walk-in closet and calming views, and a second-level loft with wet bar, kitchenette, and sitting area-perfect for guests, multigenerational living, or a private sanctuary. Outdoor living is elevated with an expansive screened lanai, pool with swim jet and spa, full pool bath, upper terrace, and third-level observation deck offering tranquil views of the mangrove canopy and wide waterway. An assigned boat dock allows seamless marina access, while an oversized two-car garage, lush natural surroundings, and sweeping water views from nearly every room complete this refined island estate. Ownership also includes the benefits of professional community management, meticulously maintained common areas, scenic walking routes, preserved natural and historical landscapes, and a lifestyle that balances luxury with environmental stewardship-making this a rare opportunity within one of Marco Island's most coveted and prestigious waterfront communities.