Which stakeholder group holds the most responsibility for driving sustainability in the built environment? Is it legislators, investors, contractors or consumers? Four members of our academic team argued on behalf of each of the stakeholder groups to help answer these questions. Our CertHE programme leader, Hazel Lobo, argued on behalf of legislators; our real estate programme leader, David Hourihan, argued on behalf of investors; our building surveying programme leader, James Ritson, argued on behalf of contractors; and our tutor, Janet Hontoir, argued on behalf of consumers. UCEM PR and social media manager, Andrew Belt, chaired the 30-minute debate.