Nestled in the heart of Old Mount Pleasant, 733 Atlantic Street is a custom-built residence located in a X flood zone, that effortlessly blends classic Lowcountry character with refined modern living. Just minutes from the beaches of Isle of Palms and Sullivan's Island, life moves at an easy pace. Golf carts roll beneath grand oak trees, and evenings are often spent watching the sunset along the waterfront at Pitt Street Bridge. Inside, thoughtful design and quality craftsmanship define every space. The kitchen is both beautiful and functional, appointed with high-end KitchenAid appliances, custom cabinetry, expansive prep areas, and a statement island that naturally gathers family and friends. Hardwood floors, shiplap accents, a gas fireplace, and built-in storage throughout add warmth and character to the home. The primary suite is a true sanctuary, featuring a spa inspired bath with double vanities, a glass enclosed shower, and an additional private outdoor shower that perfectly complements the coastal setting. Upstairs, three additional bedrooms offer flexibility, including one with a private bath and two connected by a Jack-and-Jill bath. The laundry room is as impressive as it is practical, designed with double washer and dryer sets, abundant cabinetry, generous counter space, and built-in desk areas for effortless multitasking. Outdoor living is equally inviting. A screened-in porch with a wood-burning fireplace and wet bar sets the stage for year-round entertaining. The backyard provides privacy and room for a future plunge or cocktail pool, while the fenced front yard creates a welcoming space for children and pets. A standout feature of the property is the detached guest cottage, one of the largest accessory dwelling units in the neighborhood. Offering approximately 1,000 additional square feet not included in the main home's total, this fully equipped space includes a bedroom, bathroom, kitchen, laundry, and multiple living or flex areas. It is ideal for extended family, long term guests, a private office, or potential rental income. This charming Lowcountry escape is within close proximity to Mount Pleasant Academy, the shops and restaurants of the Old Village, and the scenic harbor. With the anticipated Old Village Swim Club currently under construction nearby, residents will soon enjoy access to a private neighborhood pool as well. 733 Atlantic Street is more than a residence, it is a rare opportunity to experience the walkable, coastal lifestyle that makes Old Village one of Mount Pleasant's most desirable places to call home.