Union Heights North Charleston SC Homes & Real Estate For Sale ALL ACTIVE MLS Listings Union HeightsTotal Listings:17Average Price:$320,018Highest Listing Price:$515,000Average Days On Market:133Houses 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 seventeen listings on the local MLS for sale with an average price point of $320,018, 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 1,437 sq ft and the average days on the market in this community is 133. 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...