Lake Hartwell Seneca SC Homes & Real Estate For Sale ALL ACTIVE MLS Listings Lake HartwellTotal Listings:19Average Price:$1,331,892Highest Listing Price:$2,900,000Average Days On Market:124Houses For Sale Lake Hartwell subdivision Seneca SC. MLS real estate listings for sale in Lake Hartwell Seneca SC by price, street, age, list date, bedrooms & more Lake Hartwell Seneca SC. Currently, Lake Hartwell in Seneca SC has a total of nineteen listings on the local MLS for sale with an average price point of $1,331,892, the max being $2,900,000 and the lowest priced house $395,000. The neighborhood of Lake Hartwell subdivision in Seneca SC has an average house size of 3,241 sq ft and the average days on the market in this community is 124. 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...