In recent years we have developed very much and yet it has to come but with development problems also arise. Pollution, global warming, natural calamities, earthquakes all are increasing day by day and due to this causing severe damage to buildings like one of the majors is cracks in buildings. Not only is it caused by pollution or global warming but poor practices, poor construction materials also cause cracks in building. In this paper I have discussed some of the causes for cracks in buildings and remedies to prevent these cracks. As these cracks are too hazardous for a building or any structure, due to this a structure loses its strength and sooner deteriorates. By controlling these cracks, we can increase its service life.