"One billion square metres" is an effort to promote residential positive energy buildings that is driven by REEEP and the Global Buildings Performance Network (GBPN).

Designed to promote energy efficiency in buildings in emerging economies in the residential sector and engage with global actors in the field, “1 Billion m2” sets a work programme that will help deliver the United Nations’ Sustainable Development Goal on energy.
The project’s main challenge consists in reversing the mainstream trend around building performance by making buildings become net energy providers, instead of energy users, in all climates and for all consumers, rich and poor.
To achieve its mission, “1 Billion m2” will develop:
- Technical and practical tools, knowhow and training for the construction of energy positive buildings in key countries and ensure their use;
- A community of practice, bringing together actors in the field of social housing who stand up and are counted for a future in which buildings are net energy contributors.
The initiative was officially announced on 21 May 2013 at an EE Global Intensive Learning Session in Washington, D.C., an event designed to gain stakeholder feedback on the initiative.