A rare opportunity in Windmill Harbour, 144 Harbour Passage pairs 6,384 square feet of finely crafted living with protected views, elevator access to all floors, and one of the most compelling locations in the community. Positioned along the S.C. Yacht Club, Designed with both Southern elegance and entertaining in mind, the home can function as 7 beds/ 6.5 baths, or 5 beds and 2 ground-floor hobby rooms, ideal for a workshop, art studio, fitness space, private guest suite, or storage. The ground floor includes an oversized 2-car tandem & 1-car garages, a leisure room, utility room, guest suite with ensuite bath, and a patio overlooking the harbour. The main living level features a grand entrance, exquisite wood flooring, superior solid millwork throughout, a chef's kitchen at the center, formal dining room, parlor, office, great room, half bath, and a balcony overlooking the harbour. The third floor offers an oversized owner's suite with 2 walk-in closets & ensuite bath, a kitchenette, laundry room, plus 3 additional bedrooms, each with ensuite baths, and a large balcony overlooking the South Carolina Yacht Club. The fourth floor includes a large family room/movie theatre and 2 additional rooms with a shared bath. Windmill Harbour is one of Hilton Head Island's most distinctive private communities, centered around a protected inland harbour surrounded by impeccable landscaping and a private lock-controlled marina connecting to the Intracoastal Waterway. Known for its Charleston-inspired architecture, private setting, and strong sense of place, the community offers a boating-focused lifestyle that stands apart from the island's more traditional golf-oriented communities. The South Carolina Yacht Club, located within Windmill Harbour, provides an elevated private club experience with dining, tennis, pickleball, fitness, swimming, yachting events, and a vibrant year-round social calendar. This is a rare opportunity to own a substantial harbour-view residence in one of Hilton Head Island's most private and prestigious waterfront enclaves.