Brunswick House is a large Georgian mansion in Vauxhall, in the London borough of Lambeth. In the eighteenth-century Brunswick House (originally Belmont House) was a grand house that stood in five and half acres of parkland and was originally built with a coach house, offices, stables and three acres of gardens that reached down to its own a timber dock on the Thames, on lease from the Dean of Canterbury and frontage onto the Old Portsmouth Road. The vaulted cellar still gives an idea of its size.