What is significant?
Boonar is an early twentieth century house of conventional form, plan and style but built with pressed cement blocks. It is located on the north side of the Hamilton Highway in the township of Tarrington. The house was constructed after 1910, and served as the Tarrington Post Office for some time. There has been no architect or builder associated with the building. The building is in excellent condition and retains a high degree of integrity.
How is it significant?
Boonar is of historical and architectural significance to the community of Tarrington and to the southern Grampians Shire.
Why is it significant?
Boonar is of historical significance for it's previous use as the centre for communications in Tarrington, operating as a post office for some years. Boonar is of architectural significance because, on the one hand, its form, plan and style are conventional for the period but, on the other, it is an early use of pressed cement blocks as the main construction material and it is the best surviving example of several in the district.