Construction has since started on the project which will allow the railway’s restoration team to carry out almost all loco overhaul-related tasks under one roof with the specialist tools it requires.
Key to building the shed was a £64,200 grant from the Heritage Lottery Fund, along with funding from a number of other sources.
The start of construction was launched by Central Suffolk and North Ipswich MP Dan Poulter and since then work has moved on apace.
Much of the shed’s structure is now in place, with the pit used for examining engines from underneath also started.
Robyn Llewellyn, head of HLF East of England, said: “This project will not only preserve important heritage skills, but will introduce a large number of people to the fascinating heritage of transport in their local area.”