2-5% of the cost of the house. Consists of a slew of 28 possible costs.
https://www.houzeo.com/blog/how-much-are-closing-costs-for-buyer-in-missouri/#:~:text=How%20Much%20are%20Closing%20Costs%20for%20Buyers%20in%20Missouri%3F,%2D%2411%2C807%20as%20closing%20costs.