West Midlands Ambulance Service was called to the site in Blackacre Road, Dudley yesterday afternoon.
A West Midlands Ambulance Service spokesman said: “The man in his twenties had fallen approximately twenty feet from a scaffolding tower. He had fractured both legs, an ankle and a wrist.
“He was given pain relief at the scene and was immobilised with the use of a spinal board and neck collar and was taken to Russells Hall Hospital for further assessment and treatment.”