Tom Bosley -- who famously played Mr. Cunningham on  Happy Days  -- died this morning at a hospital in Rancho Mirage, CA ...
Average estimates: $250 to $420. Power washers can have pressures of 4,000 psi (pounds per square inch) to lesser pressures of maybe a few hundred and run by gas or electric. This means that professionals will probably use one with less pressure to clean a deck and maybe one with higher pressure to clean a patio.
In the Chicago area, Ward says pressure washing prices are around $250 to $300 for the average 2,000-square-foot home. While homeowners can buy or rent power washers from many home improvement stores, hiring a pressure-washing professional can actually save you time and help avoid mistakes caused by using too much pressure to clean the dirt or algae.