The project is due for completion in July 2022.
Leanne Brooks, sponsor for Network Rail, said: “We’re really excited to be starting this work to provide lifts to platforms at Smethwick Rolfe Street, which will provide step-free access to trains for everyone in the local community for the first time.
“We are working closely with the station operator, West Midlands Railway and Sandwell Council to ensure our work brings as little disruption as possible to neighbours and passengers.”
Brenda Lawrence, head of stations for West Midlands Railway, said: “Making sure the railway is accessible for everyone is a priority for us, and these improvements will make a real difference to our customers.
“Train services will continue to run as usual throughout the work, and we are already looking forward to unveiling these brand new facilities in 2022.”
There will be no disruption to train services while work takes place, but the station will take on a different appearance, with hoardings up around the construction site.
During the project, a lane on Tollhouse Way will need to be closed at certain times:
Monday 10 – Wednesday 12 January for preparation work