Yeah the worst thing about working from within your house... bathroom, coffee, anything at all that necessitates going out of the room entails a major context switch for the most inane reasons and conversations.
I agree with that, but I often wonder whether maintaining a separation for longer periods just leads to a bigger backlog of these topics building up and making it worse when it does happen.
In this case they'd still have to go inside to go to the bathroom. :/
I've got a bathroom in my out-building office, too, and a small kitchen with a sink, coffee maker, toaster, fridge, and so on. The limit is money to spend and land area to build on :)
to be honest, having to walk inside to use the bathroom or refill your cup of coffee seems like a nice way to stand up and get the blood flowing again + breathe some fresh air.