Abstract-In order to improve the quality of construction and its sustainability without sacrificing strength, stability, performance, life of the structure and environmental friendly properties, usage of different eco-friendly materials are considered in load bearing masonry structure. In this study a suitable plan is selected and structural elements are designed as per Indian standard codes. Cost comparisons are made between building materials and labour required for construction of a ground plus four residential building using clay bricks, fly ash bricks and cellular light weight concrete blocks. The loads transferred to foundation from block masonry are also considered. From this, based on resources, cost optimized solutions are derived.