Hi Suds,
there are some real rundown Council Estates in Stockton, especially heading toward Norton.
Judging by the state of the place, I don't believe many would even bother with window cleaning.
So the only way one could get better pricing is to look to cleaning in better, more up market areas.
We have a fair bit of work in Skelton, and the problem we face is the perception among the public is that a 3 bed semi is £6 to £6.50 to clean. Cleaning in Guisborough is better priced, but the place is teaming with window cleaners.
Hourly rate is not always what you charge per house. I have been told of a window cleaner who only does the fronts of a couple of streets of town houses. 1 upstairs window, 1 downstairs window and door for £2.00. But he does most of the houses, ie about 40 and finishes them in a couple of hours. That's a magic hourly rate for up here. Not worth canvassing that area - one would pick up a couple but not worth the effort.