Residential conversion of office space on the St Kilda Road boulevard has led to the strip’s lowest office vacancy rate in eight years. Its office vacancy rate has dropped to 7.3 per cent, according to research by Savills, a level 38 per cent tighter than the 25-year average of 11.8 per cent. Savills associate director of office leasing Kizzy Okoukoni said: “It’s been phenomenal. The residen