Union Heights North Charleston SC Homes & Real Estate For Sale MLS Listings Data: Union Heights Total Listings: 15 Average Price: $232,590 Highest Listing Price: $445,000 Average Days On Market: 133 Houses 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 fifteen listings on the local MLS for sale with an average price point of $232,590, the max being $445,000 and the lowest priced house $79,500. The neighborhood of Union Heights subdivision in North Charleston SC has an average house size of 773 sq ft and the average days on the market in this community is 133. 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...