Abstract: This project reviews the cost effective construction materials and techniques for building design in the field of civilengineering. It comprises the important analysis and results from the experimental and literature of many authors. Housing is agreat problem in today’s world. The most basic building material for construction of houses is the conventional burnt clay brickand cement concrete. A significant quantity of fuel is utilized in manufacturing these construction materials. Also, continuousremoval of upper surface of soil mass, in producing conventional bricks, creates environmental problems. This project involvescost estimation of a duplex, first by using conventional building materials and then by alternative building materials to determinethe total cost that can be reduced by using alternative building materials.Keywords: Low Cost Housing, Sustainable Housing, Building Materials, Fly ash brick, M Sand, P Sand, Ceramic tile,