Rare Bayfront Opportunity - Upper Florida Keys | MM 100 Builders, investors, and luxury home buyers — this is the parcel you have been waiting for. Positioned directly on prestigious Buttonwood Bay at Mile Marker 100, this 12,000 sq. ft. gated and fenced property offers approximately 200 feet of lot depth — an exceptional and highly desirable feature rarely found in the Upper Keys. Deep dockage provides direct open-bay access to world-class fishing and boating. Surrounded by distinguished bayfront estates — with nearby dry lots approaching $2M — this property presents an outstanding opportunity to build a custom waterfront masterpiece with room for a pool, guesthouse, RV, and recreational vehicles. The existing turnkey bungalow allows for immediate use, seasonal enjoyment, or income potential while designing and permitting your dream residence. Enjoy sweeping sunset views, steady bay breezes, and waters teeming with dolphins, manatees, and tarpon. Conveniently located near Florida City, the Everglades, Key West, and Miami Beach, and just moments from the Upper Keys Sailing Club, fine waterfront dining, and premier resorts. Whether you envision a private luxury retreat, income-producing investment, or legacy estate, this property delivers land, location, dockage, and future upside. Motivated seller. Creative financing may be considered for qualified buyers. A rare chance to secure prime bayfront property in one of the most desirable areas of the Florida Keys. Bring Your Beautiful Boat! This private, gated 12,000 sq. ft. property offers deep dockage, sweeping open-bay views, and stunning sunsets. Enjoy the existing turnkey bungalow while designing your custom dream estate surrounded by luxury homes. Close to The Upper Keys Sailing Club, fine dining, and resort amenities — this is where land, location, and lifestyle meet. owner - agent