Supplements: has been updated in recent years with marble patterned tile and a quartz counter on the large double vanity. A laundry room is conveniently located just outside the primary suite as well. A beautifully detailed staircase brings you to the second floor, with three bedrooms, two full baths and an additional laundry/utility room. The third floor offers a large flex room with space for a media room, gym, or office and access to an upper porch with views over the courtyard. From the back of the kitchen, there is a porch that provides a transition into the spacious and elegant courtyard. Bordered in brick with bluestone pavers, stucco walls and a fountain, this private oasis is reminiscent of Charleston's finest courtyards. A detached one-car garage sits at the rear of the lot, with a nicely finished room, full bathroom and ample closet space above, offering an additional guest room or home office. NOTE ON SQUARE FOOTAGE: Professional measurement shows a total of 3,358 sq.ft., with 2,952 sq. ft. in the primary structure and 406 sq. ft. in the nicely appointed FROG (price per total sq. ft. is $683.44). 138 Ionsborough Street was constructed using Insulated Concrete Form (ICF) framing, offering an unparalleled level of insulation and sound absorption - an extremely solid and energy efficient design. Located in the award-winning I'On neighborhood, this elegant and well-maintained home is just 10 minutes from downtown Charleston, 20 minutes to the beach, with schools, dining, shopping and conveniences very nearby. The neighborhood offers walking trails, parks, lakes, a boat ramp and the opportunity to join the private I'On Club with swimming, tennis, dining and pickleball. This is a wonderful opportunity for luxurious living in the heart of Mount Pleasant!