Sydney Works or Sidney Works is a building on in Sheffield, England. It has seen a variety of uses, and occupies a prominent site beside the Porter Brook, surrounded by car parks. The site was originally occupied by the City Saw Mills. It was occupied by four back-to-back buildings used until the 1970s by various small industrial businesses, most prominently Deakins Silversmiths, later renamed Sydney Silversmiths. The rear wing of the building was constructed in 1902.