In 1902 the Railway and Tramway Construction Branch, headed by Mr Deane, reported that "plans and detail drawings have been prepared in the office for the whole of the retaining wall and shops in Pitt-Street, both north and south of the new road in front of the Station, also for the Devonshire-Street subway and for the whole of the basement floors, including drainage, telephone tunnels, &c.;" At this stage, the estimated cost of the works was 561,600 pounds, however, it was "probable that his estimate will be exceeded".