If work on Mainzeal Property and Construction's sites is frozen for another six weeks, national construction activity could be depressed by up to 3 per cent, says an economist.
Gareth Kiernan, Infometrics managing director, said the receivership of such a big firm would have an effect on GDP.
"Some may postulate that the total impact will be larger because of the potential flow-on effects for subcontracting firms as well as a hit to broader economic confidence," Kiernan said.
"My response to that would be that the 3 per cent hit to nationwide construction activity assumes that the workers and subcontractors who would have been employed on Mainzeal's projects in February and March do not do any other work in the meantime - a reasonably extreme and pessimistic assumption," he said.
"If at least some of the subcontractors move on to other work, then it will reduce the magnitude of the 3 per cent knock to construction.