Over the years, I’ve built three outdoor cat enclosures for my cats.
Here is an old article (in German) about the first one:
https://medium.com/@Lemuria/katzengehege-im-eigenbau-a0f178aa4b16
I’ll move it here soon.
When I have time, I’ll also write about the last one, of which I’m quite proud and which includes all the lessons I’ve learnt.