Tucked quietly behind a private gate in Charleston's Historic District, this rare 1840 carriage house marries historic character with modern comfort. Originally built by Acadian Basile Lanneau as a neighborhood schoolhouse, the residence now offers a serene retreat with primarily single-level living, multiple private entrances, and two designated off-street parking spaces.Set on a generous private garden, the 2-bedroom, 2-bath home features high ceilings, grand windows, and two fireplaces with gas and wood-burning capability, creating a warm, light-filled atmosphere. Thoughtful storage and millwork elevate daily living, including custom maple built-in cabinetry in the hallway leading to the primary suite. The plan provides two distinct suites for privacy: the primary includes a walk-in closet, dual-vanity bath, and a garden-view sunroom, while the guest suite sits on the opposite side of the home with its own full bath. At the center, the living and dining areas flow into a well-appointed kitchen with custom rift-sawn white oak cabinetry, premium Dacor appliances, and a U-Line clear ice maker, ideal for effortless entertaining. Elegant details include 10-inch French white oak wide-plank floors, custom millwork, Visual Comfort lighting, and a hand-cast stone fireplace mantel. Bath finishes are elevated and cohesive throughout: the primary bath features a Marin ceramic trapezoid floor with 12×24 honed limestone walls, and the guest bath offers a White Carrara mosaic floor with Makoto ceramic walls, all by Bedrosians. Outside, the expansive garden is a rare downtown luxury, designed for gatherings and quiet moments alike, with lush landscaping and a versatile shed, perfect for storage or conversion to a personalized studio. Recent improvements deliver peace of mind: roof replaced in 2017 and recoated in 2023; all-new electrical, plumbing, and HVAC; an encapsulated crawlspace; custom entry doors; and refined hardscape and landscaping, enhancements that honor the home's history while ensuring modern ease. Ideally situated in Harleston Village, the property is moments from King Street shopping, dining, and galleries; minutes to the City Market, MUSC, and Colonial Lake; and surrounded by distinguished architecture, neighborhood parks, and the famed waterfront. This detached carriage house is a private sanctuary with deep Charleston roots, where privacy, history, and location meet.