the scale and architectural quality of transport house is a reflection of the importance of the railway system to sydney and nsw. it also documents the process of centralisation and rationalisation of state administration. transport house is one of the most intact art deco buildings in sydney, and one of the earliest fully resolved art deco expressions in the sydney central business district. it is an important building by prominent firm of h. e. budden and mackay, and was awarded a sulman medal in 1935 and royal institute of british architects medal in 1939. substantial important intact office interiors survive. the building is rare for its scale and extensive use of green terracotta facing, considered the most impressive in sydney. it is a major element in the townscape of wynyard square precinct.