The Model Factory and Dwelling is a heritage-listed former factory, store and dwelling and now offices located at 120 Gloucester Street in the inner city Sydney suburb of The Rocks in the City of Sydney local government area of New South Wales, Australia. It was designed by George McRae and built from 1912 to 1913. It is also known as Chung Lun Building and (erroneously) the Housing Board Building. The property is owned by Property NSW, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 10 May 2002.