In this publication by the Circular Building Coalition titled ‘Four circular building pathways towards 2050’ the EU construction sector is discussed as a significant carbon emitter, with projected emissions of 245 Mt CO2e annually until 2050. 

The sector also generates substantial waste, with 124 Mt from demolition in 2022. Continuation of current practices will exceed the 1.5°C warming limit by 2026 and the 2°C limit by 2031. Implementing circular economy principles can drastically reduce emissions and material use. 

A Circular Building Scenario, combined with decarbonisation, can cut CO2e emissions by 4.15 Gt, keeping the 2°C scenario within reach by delaying the emissions exceedance from 2033 to 2042. 

This approach could reduce emissions by 84% and material use by 25% by 2050. Integrating multiple pathways and addressing social impacts are crucial for a sustainable transition.