Sounds a reasonable average to me, but like mick has said is that average about 30 mins of cleaning time ?
Some figures are useful, some misleading, if you say cleaned a large sheltered housing complex you may only average £6 per unit but easily do 10 p/h. Likewise 3 big houses with an average price of £35 but take 5 hours to clean.
We set a rate p/h that covers wages,bills, rent,vat etc... The guys hit that were all happy.
Darran