We need a tap fitted at the back of the house, typically all the water is at the front... so it'll need to be connected in the loft, run about 20ft across the loft and then dropped down the wall outside to a tap.
Anyone have a rough idea of how much this will cost? I'm just looking for an educated guess so I know whether to get someone round to quote. I don't want to waste everyone's time if it's going to be silly money. (I know it's a DIY group but if I have a go, this has disaster written all over it!)