Gahagan Summerville SC Homes & Real Estate For Sale MLS Listings Data: GahaganTotal Listings:4Average Price:$483,000Highest Listing Price:$545,000Average Days On Market:143Houses For Sale Gahagan subdivision Summerville SC. MLS real estate listings for sale in Gahagan Summerville SC by price, street, age, list date, bedrooms & more Gahagan Summerville SC. Currently, Gahagan in Summerville SC has a total of four listings on the local MLS for sale with an average price point of $483,000, the max being $545,000 and the lowest priced house $389,000. The neighborhood of Gahagan subdivision in Summerville SC has an average house size of 2,422 sq ft and the average days on the market in this community is 143. RelativeSort by Year Built: low to highSort by Year Built: high to lowSort by price: low to highSort by price: high to lowSort from oldest to newestSort from newest to oldestSort by status: active to under contractSort by status: under contract to active Filters Saving Subscribe Unsubscribe Switch to Grid View Switch to Map View Loading...