The typical pressure washing costs are as follows. To pressure wash a typical house is between $220 to $320, $200 to $350 for a driveway, and $300 to $420 for a deck or patio. This would include degreasing and removing stains. Average pricing to pressure wash per square foot is between $0.18 and $0.45 per square foot for normal pressure washing. If there are stains like mold, grease, or dirt, then the prices more than likely will go up. Before we give a straightforward answer to the question of what is a water fed pole, let's make one thing crystal clear - a pure water window cleaning setup consists of two components: a water purification system and a water fed pole.