The former main office or administration building of the Colonial Sugar Refining (CSR) Co Ltd, at Refinery Square off Bowman Street, in the inner west suburb of Pyrmont. The heritage listed building was built in 1906 in the Federation architectural style. CSR Limited had a major sugar mill, sugar refinery and associated industries at this location. Over the years, the company diversified operations into rum distillery, building products and eventually mining. The site was redeveloped into a high rise residential estate with the main office now used as a community centre leading to a gymnasium and pool.