Coved niche

[Glenn Woodward]

Building it will be done with plywood. They will cut a profile out and make about 5 copies and then flare them around the radius. Then they will cut the sheet rock and score it so it will flex with the curves and they will tape and bed it to smooth it out. Again, seems more complicated than it is.

Sorry for the crude pic but just wanted to show an idea of how I've seen it built.

Or, you could just buy one:
http://www.simplymouldings.co.uk/niches.htm

You can also find this one in the library at Architectural..Millwork...Wall Panels & Niches...Wall Niche.