Presenting one of the largest Bayfront homes on Promontory Bay, 518 Harbor Island Drive is a study in refined coastal living. Enter through a privately gated courtyard and be greeted by soaring, coffered custom ceilings, marble flooring, rich wood paneling and expansive living spaces. The gourmet chef’s kitchen has top-of-the-line stainless steel appliances, oversized center island with prep sink, and a 4-story dumbwaiter. A sprawling master retreat features tray ceilings and includes a sitting room, two fireplaces, master bathroom with dual sinks, deep soaking tub and custom light fixtures, and a beautiful balcony accessed by French doors with unmatched bay, inlet, and city views. A rooftop deck, subterranean wine cellar accessible by a hidden passage way, and billiards room are additional unique highlights of the estate. Rich finishes include oak paneling throughout, stone balustrades, and custom crystal and brass chandeliers. Offering 50’ of water frontage and two 50’ piers to accommodate large vessels, this estate exemplifies the very best in coastal luxury living.