Gahagan Summerville SC Houses For Sale MLS Listings Data: Gahagan Total Listings: 4 Average Price: $483,000 Highest Listing Price: $545,000 Average Days On Market: 153 Houses 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 153. Relative Sort by Year Built: low to high Sort by Year Built: high to low Sort by price: low to high Sort by price: high to low Sort from oldest to newest Sort from newest to oldest Sort by status: active to under contract Sort by status: under contract to active Saving Subscribe Unsubscribe Loading...