My primary concern is temperature regulation. I know all garages I’ve interacted with get extremely cold and hot during extreme days since there is not insulation built into the walls of garages and the concrete floor readily spreads and contains those temperature. What are some measures you’re taking in regards to the winter and summer?

If you live in a mild climate that doesn’t experience extreme heat or cold, and your indoor and garage temperatures stay pretty consistently the same this might be a good place for him, however I will say that when I was a child and had my first house rabbit we let him live in the garage woodpile during the winter (he loved it there) and come into the house whenever he wanted but the extreme temperature fluctuations ended up getting him sick and he died of pneumonia after a couple months. I was devastated. The vet said that without a consistent temperature he was unable to regulate his coat properly and ultimately it was the back and forth that killed him ?

My concern (in addition to climate) would be that he might get ignored a bit out there (even with the best intentions it could still happen). I think it’s best that his home base is in a high-traffic area, so he gets interaction even when he’s not give free-run, and so that he’s not forgotten if people get busy.

Even if he has more space, he would be happier to interact with his family.

My concern with that would be the temperatures. If your bunny has been inside his whole life, he might have a hard time adjusting to the winter and summer temps. Especially in the summer because garages can get pretty hot. If temperature was out of the picture, then I would say that it would be a great space for him!