This report aims to promote a sustainable development approach to meet the immense needs in terms of construction in Africa, based on a rational and sustainable use of local materials. To this end, it presents the advantages, challenges and conditions of use of these materials. It presents examples of technical solutions illustrated by a panorama of the potential resources of the territories (bio and geo-sourced). It provides elements of analysis of the impact of local "short circuit" channels and elements of methodology. It also highlights the need to match architectural design with the specific characteristics of locally available materials, which can be summed up as: "the right material in the right place".