Thank you for the feature request through the Idea Box!

You can record which building kit a house was made from, and the app takes it from there. Pick a kit and the house's size and floor count fill themselves in and lock, because the kit already decides those. Change your mind? Clear the kit and you're back in control.

Building in Bubbly Basin? The Pokémon list now only offers ones that can go underwater, so you can't accidentally pick someone who isn't allowed to live there.

There's also a new filter to find houses by the kit you used, and the kit name appears on the house card and in the save summary.

A full Kit Counter I was not able to create. I am missing the information on how much kits are allowed per area. So that one will have to wait.