The building was designed to accommodate all the various offices of the Railway Department and included the Commissioner's Suite and the "Trouble Room".

[2] Transport House is a twelve-storey steel frame office building above Wynyard railway station, designed by H. E. Budden & Mackey in the Inter-war Art Deco style.

The framed structure supports a broad, asymmetrically facade, with horizontal bands of large bronze-framed windows.

The building features two main entrances incorporating stairs and escalators leading to Wynyard station.

The interior of the building retains original office fitouts with fine timber joinery and decorative plaster ceilings.

[2] The scale and architectural quality of Transport House is a reflection of the importance of the Railway system to Sydney and NSW.