Grossmann House is a heritage-listed former residence and Maitland Girls' High School premises and now house museum at 71 Church Street, Maitland, City of Maitland, New South Wales, Australia. It was built from 1860 to 1862 by Isaac Beckett and Samuel Owen. It is also known as Grossman House. The property is owned by the National Trust of Australia (NSW), and is associated with the neighbouring Brough House, which is also owned by the National Trust.