As a leading pressure washing company in Williamsburg, Virginia we complete a lot of power washing projects every year. Our most popular washing project is house washing, but after house washing the second most popular washing project is deck washing. As a certified power washer by Power Washers of North America (Yes, it is a real thing lol) we know what we are doing and how to properly wash your deck. On average to clean your deck costs between $250-$350 for an average size deck, which is around 15×12-15×25. Some of the variables that could change the pricing is the current condition of the deck, deck materials, height of the deck, and the location of the project are just a few variables when finding out how much a deck cost to pressure wash.