when i done them the contractor was paying £30 per house, a pain getting concrets off gutters and high facia boards, doors, garage doors. i was going to walk away but got stuck in . i dont do them now. i was the 3rd cleaner they had , the next person will be the 4th.
i did these in march , im still waiting for my payment. they told me storey homes pay every 60 days, 1/may i was told i will get it, ill wait and see.
make sure you have an email or writing stating payment date to be paid after invoice.