You cannot hammer a hole into stucco without damaging it. Stucco is a tricky material to deal with even when you are using the right tools, and trying to hammer into it is not recommended. Having a cordless drill at hand will help you in drilling a hole in stucco and ease a variety of hefty tasks around the house. I have compiled a list of best drills for home use, which can be a good place to start your search for a drill.