The Globe and Mail Dan Healing Bookmark Please log in to listen to this story. Also available in French and Mandarin. Log In Create Free Account Getting audio file ... This translation has been automatically generated and has not been verified for accuracy. Full Disclaimer Jeff McIntosh/The Canadian Press Vacancies in Calgary’s downtown office towers have risen to record levels and there’s no landlord relief in sight with almost one in three offices sitting empty and sublets accounting for a quarter of available spaces on the market. The city’s glut of empty office space has previously been linked to overbuilding but two commercial real estate reports released this past week show that downtown vacancy rates in Canada’s oil and gas capital are the highest in the country and growing – despite no major new towers opening in the past two years.