We are getting stage payments for a build that is underway at the moment. What has to happen is our Engineer has to complete a buildings inspection report, which includes the value of work completed to date, this is the amount of the drawdown, based on what has already been drawndown, e.g.
1st report Value of work completed = 30k, drawdown = 30k
2nd report Value of work completed = 60k, drawdown = 30k, etc
Hope this helps