I know lawn site might not be the right place to ask this, but I figure someone here has run across this with customers and could point me in the right direction. There is a house on the market I am interested in, but its not in the best shape. The kids have been put through college and the parents now want to move on from the big house. Below are some photos of the side of the house that are dirty. The 'dirt' might actually stains from the large tree and bushes growing against the house, I am not sure. I didn't spend a lot of time looking at the house but I did try to rub the 'dirt' away with my hand using a small amount of pressure. Hardly any came off. My question is, can this even be cleaned off somehow by me or a professional? If by professional how much could it run? Here are the pictures. All I have is an older 2.0 meg Olympus digital that I can't bring myself to replacing because it still works real well. Oh yeah, I have never owned a house before. I am new at this.