The Perrins Hall was built in 1914 to the plans of Alfred Hill Parker (an Old Boy) in a Jacobethan style with an Oriel Window on the staircase end and balcony looking over the hall. The interior is panelled with fitted bookcases (which make up the Dowty Library) and a plastered ceiling. Two war memorials for the two World Wars are housed in the hall and a life-size portrait of Charles William Dyson Perrins hangs opposite the fireplace. Portraits of the 20th-century headmasters hang below. The school organ is in this building, and is played regularly at assemblies.