I'm in the same situation. I have chicks that are 4 weeks old. As long as they are in at night, I've been keeping them outside (in a supervised fenced off area) during the day. Really ready to get them in the coop!
We are getting our coop next week and i plan to work on the foundation this weekend. I think we have decided to put the coop next to the house (as opposed to next to the fence) to deter predators from digging under our 6ft high wooden fence. You folks have convinced me to use hardware cloth...