This month, a report released by the RIBA voiced support for post-occupancy evaluation (POE), recognising its contribution to making buildings ‘greener, healthier and better value for money’. But to overcome the environmental challenges we face, we need to go further. We have to urgently recognise and evolve the role of the architect to protect our existing buildings. We designers like to let sleeping dogs lie; not picking past projects apart to admit what could have been done better.