sorry back to OP ............ never a 100% but about to put a commercial up from £10 to £15 ..... childs day nursery with 12 windows takes about 25 minutes cos some right tricky windows to reach ....... I didnt price it up its one that came with some residential work I bought.
They may cancel but not bothered as not prepared to clean it for a tenner anymore.
Now just about 2 years in and round full so this year any new jobs will be priced to the max and all work currently on books getting reviewed pricing wise as I go once the review is done will prob put everything else up by a quid.
Priced a job yesterday a barn conversion with only 4 windows but a biggish glass conservatory with glass sides and clear glass roof went in at £20 a month but £40 for the initial clean as in poor state and them clear roofs are a PIA .... last year I would have prob quoted £14 with no double on the first ... plus she smelt of a 1 off so at £40 its about right ............ still waiting to hear back though
