Union Heights North Charleston SC Homes & Real Estate For Sale ALL ACTIVE MLS Listings Union HeightsTotal Listings:16Average Price:$308,150Highest Listing Price:$515,000Average Days On Market:147Houses For Sale Union Heights subdivision North Charleston SC. MLS real estate listings for sale in Union Heights North Charleston SC by price, street, age, list date, bedrooms & more Union Heights North Charleston SC. Currently, Union Heights in North Charleston SC has a total of sixteen listings on the local MLS for sale with an average price point of $308,150, the max being $515,000 and the lowest priced house $100,000. The neighborhood of Union Heights subdivision in North Charleston SC has an average house size of 1,417 sq ft and the average days on the market in this community is 147. 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...