It is another sign of the changing face of Sydney's rail network due to technology.

Instead of tickets, train passengers will soon be buying other goods and services from scores of ticket offices which will have been turned into shops by November.

Sydney Trains plans to lease ticket offices at stations such as Martin Place in Sydney's CBD. Credit:Louise Kennerley

With the Opal electronic ticketing system firmly entrenched, Sydney Trains has decided to lease out 30 ticket offices at stations across the rail network following their closure.

The ticket offices to be leased to retailers range from those at stations at Gosford, in the north, to Wollongong in the south, and Central Station and Martin Place in Sydney's CBD. They are located in prime spots at stations, and are up to 135 square metres in size.