In order for us to be able to adhere to our kitchen design, we needed to bump up the two windows about 20 inches. This indeed reduces the light in that room a bit, but the view is not that great anyway, so this will act as a better use of space, be more energy efficient and get some nice air in that room. This was the hardest project I have ever done to date. I had to remove two windows and install new smaller ones. I had to build up a frame to support them. I made a slight mistake in that I should have purchased the new construction windows but instead bought the replacement style. I thought I was going to simply re use the lumber and move it up. Not likely as the wood was badly rotted. So we built a new frame on that wall and insulated it. Pictures are below.