Mr Badcock, trading as SJB Demolition & Groundworks, was fined after pleaded guilty to health and safety breaches.
Demolition work on a two-storey former garage building began whilst three workers were still in the ground floor. One worker was struck by the collapsing front façade wall as he tried to escape falling rubble via the front door.
He was partially buried in the rubble, as the pavement was covered in debris, and suffered injuries to his neck, ribs and shoulder.
Judge Hone said that the area had not been physically checked and that no warning was given before demolition started, as well as the importance of preventative measures being applied, not just described in documentation.
He said: “It was a great mercy that no member of the public was injured.”
Mr Badcock was also fined £12,500 in costs.