National Construction College East will close if planners prevent it from building new training facilities.
One of Europe's largest construction training providers will be forced to close its facilities if its loses a planning appeal hearing in May.
The National Construction College East, which also houses CITB-ConstructionSkills' head office, must improve its training facilities to meet industry standards or face closure. The plans, which include an application to build houses on part of the college site in order to fund the £15m improvements, were rejected at a hearing in April last year.
The college's appeal will now be heard in May. If it is rejected, the college will be forced to close facilities and to axe up to 150 jobs.
David Boyden, National Construction College director, said: "Changing requirements and the gradual deterioration in buildings and infrastructure mean that we are facing the closure of our gymnasium, swimming pool and half of the residential accommodation as it is uneconomic to spend any further money on maintenance."