Expansive soils cover a large part of the country and do not have sufficient geotechnical properties and the resulting failure of the structure occurs in the form of settlement, cracks etc. Hence it is required to use potentially cost-effective and locally available materials from industrial and agricultural wastes as a stabilizer to improve the property of deficient soils and also to minimize the cost of construction. Sugarcane bagasse is a solid waste material which is generated as a byproduct from sugar mills. This waste when burnt results in bagasse ash. It is a fibrous material with the presence of coir fiber can be used to improve the existing properties of clayey soil. It is seen that when 10% sugarcane ash and 4% coir fiber is mixed in natural soil is maximum bearing capacity and strength in the entire test sample. It is seen that the CBR value increases the new CBR value of this sample in 2.5 mm penetration in soaked and unsoaked soil is 6.31 and 14.93 respectively. The new CBR value is 2.5mm penetration in soaked and unsoaked soil is 52.42% and 159.65% increase.