Low-cost housing projects are characterized by an increasing demand mainly due to urbanization. The selection of building materials should meet the needs of local conditions to improve the quality of life for the most needed ones by building new structures and/or by improving existing structures. Sustainability regarding urban housing intends to develop new approaches to manage human settlements and integrate energy and environmental issues. Cement-Waste Slag Brick – This is used for load-bearing walls of low-rise buildings. The main feature of this is that a lot of waste slag can be recycled and either natural curing or steam curing for bricks can be adopted. Raw materials required are waste slag (80%) (fly ash, coal gangue, slag, etc.), Aggregate (stone powder or river sand), and Bonding agent (20%) (Cement or gypsum).