We're thinking of opening up the back of our little house, so a small extension onto the garden, etc. Do potential Architects come round for a chat and a look, then after that you pay them for designs/ further work? If so, is it just wrong to ask a couple to come round just to see if we chime, get on, etc, etc, before deciding who to go with. I don't want to rip anyone off at all, but I have no idea how these things work. Any advice would be great!