Teddington Station will have a lift installed by 2020, according to the council.
The station is currently inaccessible to wheelchairs, prams and people with limited mobility.
It was announced in 2014 that Teddington would be one of 26 stations across England to benefit from the Access for All funding, a £60 million Government pot aimed at improving accessibility at rail stations.
This was the result of years of campaigning from local groups, residents and councillors, who will finally see a lift installed for each platform to the overhead footbridge.
However, work has not begun nor has planning permission been secured.
Cllr Peter Buckwell, cabinet member for highways and street scene, said: “I am pleased that we can reassure residents and train station customers that the lifts are still a priority and the project is fully funded by Network Rail.
“We are hopeful that work will commence in the very near future.”
Brian Holder, leader of the Teddington Society roads and transport group, said they were “delighted that lifts are at last to be installed” at the station.
He added: “However, the Teddington Society still wants the more important southern footbridge at the station to be made fully accessible for the whole community as it is the major pedestrian and cycle railway crossing point for all routes from the riverside roads to various parts of Bushy Park and Teddington’s shopping centres.
“The Society will still continue its 20-year campaign to get this very important upgrade in place.”
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