I have a homemade cat enclosure. It's not attatched to the house so I just use carriers and a helper to get the cats from the house to the enclosure.

Here's more info on it from my kitties website and pix of it.

http://www.freewebs.com/catcam1/katzenhaus.htm


Sorry the site isn't updated more.

Stuff I will note from our original design:

* Don't use marine carpeting unless you live in a dry climate or have a good weather resistant cover for when it's not being used. We ended up having to completely rip out all the carpet and replace the sisal because of our wet weather, and the shady location, everything molded from being damp for days on end.

* Make sure to use a good stain for the wood. We only put 2 coats of cheap stain on ours and it doesn't look nearly as good now even when I power wash it.

* I'm not sure what we could have done better but we do have some warping on our human door so the latches don't all line up right. It's cat secure but not like it was intended to be.

Anyways hope that helps some.