Credit: Nick Cann, Architectural Presence
The Cassina Group is pleased to announce the successful sale of 1750 I'On Avenue on Sullivan's Island for $9,450,000, with Caroline Mollica representing the buyer. The transaction ranks as one of the highest residential sales on Sullivan's Island in 2026.
Located on one of Sullivan's Island's quiet, oak-lined streets just moments from the beach, the historic residence blends timeless architectural character with thoughtful modern updates. Originally built in 1900 by the U.S. Army Corps of Engineers, the home has been carefully restored while preserving many of its original details, including 11-foot pressed tin ceilings, vertical grain heart pine floors, original chandeliers, and five working fireplaces.
Spanning more than 6,000 square feet across three levels, the home offers six bedrooms and five-and-a-half bathrooms, with expansive wraparound porches that capture the island's coastal breezes. The renovated kitchen pairs historic charm with modern functionality, featuring professional-grade Thermador appliances, granite countertops, Moroccan zellige tile, and a custom antique island.
Credit: Nick Cann, Architectural Presence
Outside, the property is surrounded by mature live oaks, palms, and citrus trees, creating a private garden setting. A crushed oyster shell terrace, historic cistern, utility shed, carport, and whole-house generator further enhance the home's appeal. Located within the Officers' Quarters district, the property offers convenient access to the beach, island parks, tennis and pickleball courts, local restaurants, the public boat ramp, and Downtown Charleston.
"Historic homes like 1750 I'On Avenue are a rare opportunity on Sullivan's Island," said Caroline Mollica, Realtor with The Cassina Group. "I'm grateful to have represented my buyers in the purchase of such a special property and to help them begin their next chapter in one of the Lowcountry's most sought-after coastal communities."
The Cassina Group congratulates everyone involved in the successful transaction.
With a proven track record of delivering exceptional results locally, nationally, and internationally, The Cassina Group continues to set the standard in the Charleston and surrounding area real estate markets. With 55 REALTORS®, The Cassina Group had a record year in 2025, surpassing over $624 million in closed transactions. For 2026, The Cassina Group is on pace for another remarkable year with over $530 million in closed sales year to date.
