Nearly half of all architects believe they will have a declining workload over the next three months.
The figure is up from last month to 46 per cent form 39 per cent, the Royal Institute of British Architects (RIBA) Future Trends Survey discovered.
Such figures could have an impact on other areas of the construction industry, including people who have taken bricklaying courses.
Adrian Dobson, RIBA director of practice, said: "The latest results … paint a picture of an architects' profession which is now very cautious about future workloads.
"At the present time only practices in the south of England (not including London) are confident that they will be able to maintain their current permanent staffing levels."
He added that recent news regarding the government giving additional funding to support private finance initiative schemes was "very positive".
More than half of businesses surveyed however did expect public sector work to remain the same, although that figure is still down on last month's expectations.
Last week, Sainsbury's Home Insurance suggested that less people were planning on making improvements to their houses.