Oh dear. Your kitchen looks... well... sealed. Not all open and full of paths in and out of the house, like my house. Are mice really just an inevitable thing? I always thought that once we do the renovations, we could just be rid of the mice and that's that. But if your house has mice, I feel like there's no hope for mine! 
I don't think they are inevitable. Just bad luck, I suspect.
We are going to do a deep dive into how they are getting in/out this weekend. I think it's behind the fridge, where we removed the base boards to be able to fit our fridge in. There is a gap between the walls and the flooring (hence the need for base boards). So we'll fix that problem.
My husband thinks they could be getting in from behind the cabinetry. So we'll have a good sealing session from the outside (part of the blank area that we hope to put our extension on one day).
I'm sure there are a million and one entry points into the garage. But as there is no internal access from the garage to the house, I never dreamed they would be able to move between the two so easily.
Needless to say this is going to lead to us having a HUGE clear out of the garage. Which is much needed. Just didn't need it to be forced this way.
Exterminator is coming tomorrow at 4pm. He should be able to help us identify the entry/exit points.
UGH. What happened to your mouse?