I think we’ve talked before about this. I dream, sometimes, of a house we lived in when I was in kindergarten, except that, always, in the dream, it has many more floors than it did in real life and staircases that go non-Euclidean places and endless halls and even when I’m dreaming of being in that home, I know that though something is telling me this is that childhood home, I am in the dream-version of that home, not the real version.
Weirdly enough, I sometimes dream of my Grandma Phillips’s house there on Bradley Street and it is architecturally just as it was in life, always. No strange additions. And yet, I sometimes have the knowledge, even in my dream, that this is a dream home.
It’s hard to explain because it’s not quite lucid dreaming. I never make the connection that, if this is the dream version of these houses, it must be because I am dreaming. It’s just the explanation my brain needs for why I don’t recognize aspects of these places I should know in and out. (Though, I think in the case of my grandma’s home, my brain just needs an explanation for how I’m in the home of a woman who’s been dead over a decade that she sold many years before she died.)
The other night, I realized that I now often dream of a neighborhood in Nashville that does not exist in real life. It’s there on the high ground in Metro Center, where the Starbucks and the gas station is and across the street where the Maxwell House hotel is. Instead of all that commercial stuff, there’s a neighborhood full of Victorian row houses and in my dreams, my friends live there and they often invite me over to see how they’ve remodeled and renovated. So, clearly, they don’t just look Victorian. That’s the era in which they were built.
That neighborhood has never existed in real life in Nashville. Not like I dream it. Definitely not in that spot. But I go there, sometimes, anyway.
Tiny Cat Pants 
My dreams also have a lot of stock locations that are very like places I have been but with odd differences, like secret rooms. There are a lot of bathrooms (my IBS like symptoms make them particularly interesting) but no kitchens, although I often go to the grocery store. Maybe it’s a short cut for the brain to reuse dream locations.
I also have specific dream places that are a mix of childhood and some adult places. I have nothing as cool as Victorian row houses though.
Have you ever read Charles De Lint? One of his characters in the books placed in Newhome(?) has a whole other life in her dreams. It’s very cool.