Soon after the Schools of Science and Art opened the Frogmoor building, it became clear it was too small and a new site was discussed. In 1915 the Royal Grammar School moved to new buildings on Amersham Hill and it was suggested that the school (now usually referred to as "Chepping Wycombe Science and Art Schools and Technical Institute") moved into the now vacated buildings in Easton Street (also designed by Arthur Vernon). Unfortunately the outbreak of the First World War meant that the Wycombe High School buildings were needed as a hospital so the girls moved into Easton Street and the boys had to wait. The Institute finally moved to Easton Street in 1919 and soon there was a significant expansion. Firstly the 1918 Education Act raised the school leaving age to 14 and it was decided to set up a Junior Day Technical School as part of the Institute. This would be a full-time school. At the same time the Institute set up a training school for ex-soldiers and sailors who had become disabled in the war to prepare them for the furniture trade. The Easton Street buildings also soon proved too small and were significantly expanded and a series of wooden huts were installed to be used as classrooms. The Frogmoor school continued to be used after the move to Easton Street and was finally sold in 1928 (for £3,500). It has since been used for a number of different purposes including a swimming pool and is now a dentist's practice.