Elizabeth Bay House is an historic Colonial style home in the suburb of Elizabeth Bay in Sydney, New South Wales, Australia. Built between 1835 and 1839, Elizabeth Bay House was known as 'the finest house in the colony'. Elizabeth Bay House is a home in the Regency style, originally surrounded by a 54-acre (22 ha) garden, but now situated within a densely populated inner city suburb. It is managed by the Sydney Living Museums as a museum that is open to the public, on behalf of the Office of Environment and Heritage, an agency of the Government of New South Wales.