Emergency services were called to the site at General Bridges Drive, Duntroon, at 11.46am where they treated the 28-year-old man for injuries and took him to Canberra Hospital in a stable condition.

A company manager confirmed WorkSafe ACT was onsite but refused to make further comment.

The incident comes after a worker at the Nishi construction site in Acton fell 5 metres down a shaft late last month.

There have been four fatalities on Canberra work sites in the past 12 months.