In the three years leading up to the current recession, gross billings at U.S. architecture firms increased nearly $16 billion from 2005 and totaled $44.3 billion in 2008. That equates to 54% growth over three years with annual growth of about 16%.
These findings come from the American Institute of Architects (AIA) Business of Architecture: AIA Survey Report on Firm Characteristics, which is conducted every three years to examine issues related to the business practices of AIA member-owned architecture firms.