Before You Book
Pressure washing is not one method turned up or down. Siding, screens, pavers and painted trim each respond to a different approach, and the wrong one can push water behind walls, etch a surface or leave streaks that only show once it dries. A reputable contractor walks the property first, names the surfaces and the method for each, and prices the work before starting.
Runoff matters too: the water that leaves a surface has to go somewhere, and a careful crew keeps it out of planting beds, pools and the storm drain where that is a concern. Timing is worth thinking about. Washing in the middle of a humid stretch means the green film comes back faster, so late in a dry spell or ahead of a season of heavy use tends to hold the longest.
It is also fair to ask what a property actually needs. Not every surface needs washing on the same cycle, and a straight answer about what can wait is a better sign than a quote that happens to include everything. The work itself is quick to schedule and usually done in a day for a typical home.