If that was by me I'd be charging between £30 and £40, they only concern being those 2 big windows with the balcony, presume you have to get at those windows by going inside?
I'd have thought (once done regular) that it would be between 30 and 40 minutes tops (WFP)
Rog, the thing is, you price it up as if you are doing it trad, and a tight price on that trad, and bear in mind that the house windows are all leaded, in our area would be the above quoted price, and no way would you get around a house that size in just 30 minutes.
007 says there are 4 other windows on the side, counting the big ones on the front, and the glass balcony's too, at my count thats 23-24 leaded windows for the house, and a similar amount on the conservatory (at least as I would count up)
Those panes above the larger squeegee panes have leaded cross sections in. so that is scrim or microfibre work.
So thats 50 windows (as I would count them).
I wouldn't charge a £1.00 per window, but at 75p per window it comes out at £37.50, so I'd round it off to £40.
With WFP you also have the selling point of washing all the frames down, including the gutters on the conservatory.
So yes, a £1.00 a minute is very achievable on an account like this.
That might sound expensive, but the point is, you've given the customer a quote that would compare very favourably with another window cleaner pricing it up trad.
you will have spend lots of money on expensive equipment, if you charge less than you would trad, then once you take your costs into consideration, at best you'll only be scraping by on what you were before...you will have gained nothing by your investment!
Ian