When I imagine my dream house, I take the pet's needs into account.
The Spousal Equivalent and I don't need much. The most we'd want, above what we already have is a nice family room, to house games (video, role playing, board).
The dog's needs are simple. She needs a yard. A nicely fenced in yard. I'd like a small deck, with a comfy chair so I can watch her antics. A kiddie pool for the summer would be nice too!
For the cat, we need a cat tree, or six. As long as she can hang out up high, and look out a window, she's happy.