The finding was revealed by Manpower, whose research is said to have confirmed industry fears of a lack of suitably-trained workers.
Manpower managing director Mark Cahill said he was told the normal £500-a-week pay for bricklayers was being doubled.
The government says it is working with firms to “nurture home-grown talent”.
According to Manpower’s research, prospects in the construction industry are at their strongest level since 2007.
But one-in three large construction firms in London are said to have decided not to bid for projects because of a lack of skilled workers.
Chosen excerpts by Job Market Monitor. Read the whole story at BBC News – Foreign bricklayers ‘on £1,000-a-week amid skill gap’.