Labour shortages are also making it hard with 43% struggling to hire carpenters and 41% finding it difficult to find bricklayers.
A recent RICS survey has suggested this was slightly less apparent for other skilled trades like plasterers and electricians.
That said, the estimate for material costs is expected to jump by a further 9% over the period in question with skilled labour costs rising by more than 7% and unskilled costs by between 5 and 6%.
Simon Rubinsohn, RICS Chief Economist, commented:
“There is clearly an upbeat tone to the feedback received from across the construction industry. However, the concerns around labour and in particular, skilled labour are just not going away.
The long-term fix is to attract more younger people to the sector but that may be insufficient to address the immediate problem which significantly, is being reflected in expectations for a sharp uplift in wage costs over the next year."