Nothing will affect the feel of your house as much as the quality of the light. If you can at all swing it, keep your divided lights. Looking at your photo, those windows are gorgeous. Can you place glass on the exterior? I have some lead light windows in 2 locations. I made new frames with the leaded old glass on the inside and plain glass on the outside. While not as weather-tight, it's much better than single glass. While not as neat as your present windows, the new windows that have the interior and exterior lights with the spacers between the glass also look great and are at the present standards for energy efficient. We live in the PNW and used Milgard; less expensive than Anderson and Marvin, but so far I'm very happy with them.

Hi, Both comments above are what I would do. A Roman blind in the same fabric as your main window will tie the two different windows. See the picture, where I had a small window in an awkward space in the dining room, next to a large window. Keeping the same fabric helps continuity where the windows are vastly different sizes.

I'd love your advice - Where would be the best placement of my appliances, sink, oven etc? I would love to have my sink under the window - do you think it could work?

Hello, in our home under each window in the wall there is a recessed space. We are looking to pack this out so it is flush with the rest of the wall and also insulate the space. Has anyone else done this? Would love to see some finished work so I can get some ideas about how it will look