Light industry
A new single-span bridge was built beside Y Bont Fawr in 1938, and the old bridge was demolished at the end of the World War II. The 1950 saw another major transformation in Pontarddulais. New, modern tinplate works in nearby Trostre and Felindre rendered the old works obsolete. The local works were taken over by other enterprises and redeveloped as light industry. However, they did not replace all the jobs lost due to the closure of the local tin plate works. Some of the local people had to find work elsewhere. Light industry gradually began deserting Pontarddulais in the late 20th century, transforming the community into a dormitory village.