Anonymous wrote:We did it -- just put board and tile over the inside. It's still there on the outside, but it's in the backyard of a Cap Hill RH so no one sees it.
Cost the same as tiling any shower

Probably this, but it’s hard to say how much it would cost without seeing it. Would the patch have to be tiled? I assume so, since you say it’s low? The question would be whether you can match your tile or if you have to completely retile the shower. If you have extra tile or can match it, it would simply be a matter of putting in a cement board patch, waterproofing it with Schluter or whatever, and tiling the patch (if needed). Not expensive at all. As with pp, you can leave the window on the outside. We had a window like this in our bathroom and we didn’t even realize it until we were doing a renovation and the architect noticed that we had one more window on the outside than we did on the inside.