Net zero emission buildings: next generation of benchmarks and calculation rules

Abstract The definition of ambitious life cycle-based benchmarks and target values to limit the GHG emissions buildings is seen as one most important steps in pushing construction real estate sector significantly reducing its contribution global warming. Especially are no longer only developed from a bottom-up perspective. There now an interest by governments sustainability assessment system providers supplementing approaches with science-based top-down part their responsibility respect planetary boundaries. creation emission budgets combination values, well introduction strict enough legal binding requirements already today critical for achieving climate-neutral building stock. Achieving these tasks requires tackling still open methodological issues. Following work IEA EBC Annex 72 current developments Germany, paper presents main questions, key steps, modelling aspects that can cause variation uncertainties, clarifies terms definitions. It highlighted although net zero requirement universal benchmark, information on boundaries calculation rules necessary provide evidence fulfilment.