Most of the building material for construction of houses is the normal brick. The rapid growth in today’s construction industry has obliged the civil engineers in searching for more efficient and durable alternatives far beyond the limitations of the conventional brick production. This project presents the experimental investigation of partial replacement of coconut shells as coarse aggregate and fly ash as replacement of cement in the preparation of concrete bricks. In this study M10 grade of concrete was made for concrete bricks. Concrete mix of 5%, 10%, 15%, 20% and 25% replacement of coconut shell as coarse aggregate and constant replacement of 25% of fly ash were made. The brick specimen was Casted a size of 190mm x 90mm x 90mm and the Shape and size test, Compression test, water absorption test, fire ignition, Soundness test, drop test, Efflorescence test, Colour test and Structure test were conducted to analyze their suitability as a construction material.