I have a two car garage, though it is as small as can still be called two car. I'm putting in a mud room. Since I'll be putting up dry wall, I'm considering insulating it. But I'm wondering if it's worth the expense. I've come across an article or two suggesting maybe not. Here are a few relevant details in no particular order. I don't plan on heating or cooling the garage. I have a full basement where my shop is, so while I do work in it occasionally, I won't be spending much time working in the garage. The garage door is already insulated, so that's not a concern. The attic above the garage is not, so I'd have to do that too. Lastly, the mud room space will likely be open to the garage. My wife is in a wheelchair and doesn't want another door to have to open. This might beg the question of why finish part of it off, but I won't waste time detailing my reasons. I'm going to do it.
On the one hand, insulating seems like a no-brainer: its much easier to do before dry wall is up (and I suspect less expensive) and it will probably slow heat and cooling loss from the house. But is it worth it? Will the time and money spent be recouped by savings over the long haul?
I realize I'm a little short on details but any advice would be appreciated.