Overall, the materials should cost less than $100. Stucco patch kits online can be less than $15. According to Buildorremodelyourownhouse.blogspot.com, the average cost of a small stucco repair is around $400. This cost is applicable up to about 50 square foot. For the next 300 square-foot area, you will have to pay an additional amount of about $5 per square foot.