@ScottFarbman that’s the 64 million dollar question!
We have some other options in mind, hope to share later.
Although per m2 does not seem to restrain size enough, even if ratcheting down, as it is an intensity/efficiency measure. Please see @claremiflin post and blog.
Per capita would relate well to 2.1 t per cap CO2 consumption emissions by 2030 (UN Emissions Gap Report 2020).
Thanks, I wasn’t aware of BRANZ approach.
Rather than based upon building types, carbon budget per function may be more helpful. Because office (and other) functions are increasingly being conducted remotely.
Revenue per m2 has been used elsewhere.
We need to keep our focus on delivering services/functions with much less floor area and material consumption and carbon.
Please see link to another report by Yamina Saheb that further explains Sufficiency (metrics on p. 5).