ILFI’s 500 kg CO2e/m2 limit is based on an average of all building types from CLF’s benchmark study:
In my opinion, that number is too low because the buildings in the CLF study did not always include A4-5 or interior partitions but ILFI requires them to be included. I belief the CLF is updating this study which will likely result in an updated ILFI limit.
Regardless, it seems strange to put a single embodied carbon limit on all buildings regardless of building type and needs.