i always charge more for stand alone larger properties...they can take it or leave it....most of them have brand new range rovers,porsches,lamborginis,etc on the drive.one of my customers even has a mclaren F4 !
these customers are minted.....if they dont want to pay a fair price for their windows to be cleaned(so i can have a diesel hot water system,electric PF reel,xtreme poles and a brand new GOLF GTD on my drive)they can get someone else!
i always say if they refuse my price (my ambition is not to be the cheapest window cleaner in the area!)