One of the challenges with real estate photography can be getting well exposed interiors and well exposed windows in the same image. Much of the time a perfectly exposed exterior view out the window isn't that essential but when a home has a knockout view home sellers and listing agents want to see both a wonderful interior and a crystal clear view out the window in the same image.
This is a classic real estate photography problem and we've talked about it many other times over the years:
Our man in Paris, Serge Ramelli recently put up a tutorial where he demonstrates window masking. Serge, is much more entertaining than my attempts at the same thing. Note that Serge's technique only handles the situation where the window area you want to mask is very even. If you have a plant or some very irregular object(s) that needs masking this technique won't work as well. If you have a very complex my old tutorial from 2008 will deal with almost anything. It's also worth noting that there are many Photoshop Plug-ins that handle complicated edges. One of the newest of these is a Lightroom Plugin called Perfect Mask, in Photo Suite 8 which I talked about in October.