To my knowledge, there are a number of deployed home filling stations today, and I believe they are safe. I think that if there are issues, there are ways to deal with them. For example, if there are issues—and I haven't done a deep dive on the safety with respect to these, other than to know that they're deployed already—you could put the station on the outside of the house and have the car in the driveway, rather than put it in the garage, if there's some issue about gas collecting, or something like that.
I think that in an outside situation it's quite safe.