Over the years the courthouse underwent many improvements. The cost for putting a new door on the courthouse in 1819 cost £0.10.0 and in 1821 the cost of 'repairing' the building was £25. In 1825 lights were added to the courthouse, costing a grand total of £2.6.9. In 1914 the courthouse was enlarged and a new lock up room was built. During this time the statues, books and records were moved and stored in the Petty Sessions Office for safe keeping. The courthouse was much loved by all sides of the community and was a place where they could meet, but it was eventually demolished in 1952. A market was held in the square outside the Courthouse every Wednesday and a fair every Tuesday of each quarter. Horses and cattle of every description were bought and sold at the fairs. Below are some photos of a very busy Kilkeel, presumably on a market or fair day.
 Ordnance Survey p.50