I've got a sky+ install booked for next week, and I'm currently having a 2 story extension built, and as far as I can tell, it's the side of the house where the dish will need to go

. The builder is concerned that even if he gets the brickwork to a suitable height for a dish, he'll damage it doing the roof etc. and he suggested installation onto a chimney.
I've been in touch with Sky Installations, who were very helpful, and told me to that if I need to have an install on a chimney, it will attract a minimum charge of £40, although she said that it's very rare they charge more than this, and that the engineers keep the chimney install kits on their van as a standard item.
She also said that If I need cabling in excess of 20 metres, there is a 50p per metre charge, and the engineer will run the cabling where I ask him, (within reason etc).
So it sounds like if you make the guy a cuppa, and ask him nicely (and are prepared to pay a bit extra) you'll be able to get what you're after fairly easily.
I wonder if I'll be so optimistic
after my installation