Looks pretty great, they could have varying wall colours too even if it can be combined.
Typically in a batch they could release a big and a small building that could be combined, using the same colours and all that.
Like a small house and a larger house, like the Victorian houses.
But they can also do stuff like that for the police theme.
Like have a smaller police office and a big one, which still have some different facilities that can be combined.
Both could have a desk with a computer, small one could have a jail cell and the big one could have two.
Only the big one however could have a bit of an armoury with rifles, sniper rifles and stuff like that, and a helicopter platform.
The small one could be more equipped to deal with smaller problems, could maybe have a place to take pictures of prisoners and fingerprints.
I always have found it a great approach to have a bigger and smaller version of the main set in a theme, fitting for the budget of parents. And the other smaller sets can work with either.