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.

Kind of funny really how many people would feel exposed and would not want to use the bathroom. The more I think about it, it's a bit like a public restroom with stalls (as stall walls rarely go to the ceiling or floor and have the added issues of gaps between the wall panels and doors -- which thankfully we won't have!). Regarding the humidity control issue, I should have clarified this is only for a toilet and small hand basin (not a full bathroom with shower). The main room on the other side of the proposed toilet is our dog whelping room where we will have young litters of puppies (when we have them). Further down the hall, removed from this room, is our training room where there are likely to be other visitors but the proposed bathroom would be quite removed from that area. It would be wonderful to find more windows like the ones that are up near the ceiling! That would certainly solve the issue. I'll have to scour the demolition/restoration places.

The subway sign is great - but it has the scale you need on the higher wall - and the black next to tv could have better balance .. .Consider . .I would center this under the beam on the big wall at the near end of the sofa - then you will start with better balance. The television is a big black square so might as well start with the black element across. Unless you can get a mirror across from the window to reflect something light and pretty, don't bother with a mirror here. Let's think about the wall with the small window and the black tv like a gallery wall - lots of black and white frames , contrasted with black and white mats and mostly graphic black and white art. Here's the way to do that on a budget. Visit the local thrift store and imagine frames they have painted black or white. Ignore what is in them, buy craft paint and paint them all. Ikea is also good for black and white frames. Perhaps one art piece would be an offcenter b&w blow up of that charming fellow who wanted in the picture - soften everything else back and highlight just the face and hand in a vertical mini-panorama format .. or another close cropped on the face black and white in an unposed moment like you caught here. Most of the rest . simple art. Picasso line art poster could be a big scale budget element. You might buy a bad painting at the thrift store or swap meet, paint soft pale gray all over it, then dry brush some white paint on to it. If you use color in the gallery art at all . . . use just one, and I suggest the either the blue gray / true blues / not blue greens that the chaise gives off in the sunlight. Or red. Or yellow. ONLY ONE COLOR. And, just a small touch. You can frame some objects that you've painted one shadow box frame with a real object in it. , some magazine pages, some calendar art, etc. (oversized frames), Look at potterybarn.com for gallery wall advice or on younghouselove.com in their archives .. they have some terrific posts. http://www.younghouselove.com/2011/04/its-done-and-we-heart-it/ If you can, eventually hang the television on the wall above the cabinet on a swing arm so it can pull out and angle but it can be put away flat and you can shift the media cabinet sort of centered on the sofa placement across so it isn't so tight in the corner. TV in corner pulled out good, media always there . . not so good. Now for walls - I love the window layout in here. Would you consider a large landscape oriented abstract canvas that expresses your color sense over the rest of the sofa? Take the arcing airplanes into the gallery layout. This is a great lounge!

Get rid of that bulky corner pantry because it dominates the entire kitchen visually and floor space wise. A well designed cupboard pantry flat against the wall will hold all you need and free up floor space for a larger counter/bench or possibly an island if you wish.