UK commercial real estate capital values could decline by 50% over the life cycle of the current downturn, the Royal Institute of Chartered Surveyors (RICS) has warned. RICS bases the forecast on its assessment that capital values could decline by 16% in 2009 with a further drop of up to 10% in 2010 due to sharp drops in rents. Capital values of comemrcial real estate in the UK have already fallen 25% since the onset of the credit crunch in June 2007.