It's certainly not a bad thing. We can have a tendency to label feelings as good or bad. They are not either. They just are. So moving into a new phase signals progress through the expected stages and yes that's a good thing. Especially if that causes you to be more assertive about self protecting against further emotional struggle at this point.
Your idea about using the garage is a good one, as you won't then find yourself feeling uncomfortable and suspicious about any surprises in your home, which I must confess I would feel if my ex were to come in here. I like my own space and privacy and know how he used to snoop plus his tendency to leave me gut wrenching notes/sentimental gifts to find.
donkey2016 also makes a good point about security and your alternative gets around this nicely.
How will you communicate this? Have you heard of
BIFF? Since reading about this I use it with my child's father when we have essential contact and it has helped me enormously to stop me from being drawn into anything emotionally triggering. Let us know how it goes.
Love and light x