Prague has been the fourth most active office leasing market in Europe over the last twelve months, writes Jones Lang LaSalle in its latest report. The city scored a 30 percent increase in office leasing y-o-y. However, Ondřej Novotný, the Head of Research at JLL warns that in 2012 a 15 to 20 percent drop can be expected compared to the 2011 leasing volume of 325,000 sqm. “We expect a further decrease in the average vacancy rate from 12.26 percent in the first quarter 2012 to approximately 11.75 – 11.80 percent by the end of the year.“