Union Heights North Charleston SC Homes & Real Estate For Sale MLS Listings Data: Union HeightsTotal Listings:12Average Price:$271,042Highest Listing Price:$439,500Average Days On Market:172Houses 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 twelve listings on the local MLS for sale with an average price point of $271,042, the max being $439,500 and the lowest priced house $85,000. The neighborhood of Union Heights subdivision in North Charleston SC has an average house size of 945 sq ft and the average days on the market in this community is 172. 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 Loading...