Frankly, with the way the house is organized, we don't have a lot of places to put the litter boxes. That combined with the fact that our felines appear to desire venturing out-of-doors has caused me to consider enclosing the back "yard."
So I'm thinking about enclosing our tiny patio for the cats to go outside. I would build a few shelves and probably put some patio furniture out there. We don't really have seasons in Southern California, so I imagine we would get a lot of use from such a project.
There are commercial solutions available, and I found several sites which suggest such a cat enclosure can be and should be made, as well as sites offering instructions for sale and for free.
Before I did my searches, Cathy's mom (Rhonda) was suggesting using lattice work to keep the cats in. I don't plan on building any permanent additions to the house, so I shouldn't need a permit. I'm leaning towards a combination of poles and netting, but Rhonda thinks a lattice ceiling would be prettier.
Well, I should measure things, first, and clear out the back yard (or the other way around) Then I can worry about enclosing it for the kitties. I'm gonna do it some time, hopefully before school starts again.