I price according to the house/property an average terraced front/back is £65 to vac
Washing slightly more, basically over the years I know how long it takes to wash a run of sfg and I know we want to earn £x per hour, if a job takes 1hr I charge 1.5 the hourly rate as a one off clean has time to and from it.
Others just charge per meter, which is ok, but I like to take into account access, those with wide soffits, vented soffits, gable ends ( you can charge big for these because people are put off by the height, but are real easy to clean wfp )
Darran