According to the information available from the Queensland museum, the houses are best summed up in these styles:
The Large House/ The Post Office/The Big House/Our House:
The large house is similar in style and era to this one, although with an extension that was the post office:
Colonial, Federation and Interwar Pyramid/Short-Ridge House (1870s - 1920s)
The Small House/ The School House/ The Little House/ The Cottage:
Colonial, Federation and Interwar Gable/Hip House (1820s- 1930s)
The design below is a similar era and design to the little house.