Last post was a bit sharp !!!!!!
I do commercial work an my minimum price is £15 per job, this would be a job that's prob done 3 times weekly. - May only take 30 - 40 mins.
Otherwise like others have said whatever u need to earn to satisfy your living.
I have came across a job - absolutely massive and I couldn't rarely give a price, as I feared under cutting myself so I have broken down the job and gave them a hourly price of £25 per hour per window cleaner.
I can't commit myself to a job that would last more than a month every day due to how busy we are, so sign in and out an multiply hours by 25 plus vat.
It's prob not the most professional way of doing things but this is a customer Who understand how busy I am and are most understanding,
I think with houses you can't rarely price them up by the hour it would have to be by the job, but i am 100% commercial so am not the person to advise on domestics.