 Bradmill's had previously been McPhersons Jute Works and Barnett Glass Rubber, but under the ownership of Bradford Cotton Mills the site was greatly extended with "Factory block No.1" extensively reconstructed, in 1926–1927 according to Plottel's designs for a then massive £53,399.He also carried out work on the Kayser Knitting Mill in 1933 and 1936 and Lamson Paragon's paper mill in Richmond in 1937, extending his repertoire with functional industrial buildings, still exhibiting finely executed decorative effects such as the use of coloured brickwork and terra cotta.