you can also decide based on what window treatments you want.

I'd make it match the kitchen window.

Let symetry be your friend - triple casement.

The kitchen is slated to be 7' wide with the center being around 4' picture, and the two outside casements measuring around 18" each. Would it make sense to copy that configuration in the living room?

Kitchen window will be around 3'2" tall to leave some space above counter for casing and outlets (as required by code). We would want the living room window to be 3'8" tall (matching bedroom window height), would that difference in height be OK as well?

Thanks.

I think that would be fine, but 18” is on the smaller side for casements. Window companies frames differ in width with some be wider than others. Perhaps check on glass size and opening width.

@toddinmn - Thanks, and 18" isn't certain, we haven't chosen the exact dimensions of the kitchen window layout. Just trying to keep the center 'picture' larger than the outer casements.

On our new build the windows on the main floor are all the same height and then the windows on the upper floor are the same height. They are varying widths but the height is what is noticeable in my opinion. If it were me I would put in more windows in the living room than just one.

@Alison - Thanks for the info. There is a 6' wide transom window on the left side of the living room (faces driveway/neighbors house) and a single 2' wide casement in the front of the house (bottom left of picture) to the right of the front entrance/porch.

You also need to consider your possible furniture arrangements. If F is your TV, I would use two tall windows on either side of it, rather than one large one in the middle of the wall. For the D location, have you considered French doors instead of a window so you can access your beautiful backyard? You could switch the sofa and chair in your drawing to make that work. If you stick with windows, I would put in as many as possible on that wall to maximize the light and airflow.

@calidesign - F in that drawing is the transom window and possibly where the TV would be. The other spot would be in the top left hand corner - undecided for now. The reason we went with a transom and not tall windows on this wall, is that it faces our driveway and the neighbor's house will be within 40' of the side of the house. We don't particularly want to look out at their house/driveway. As for the french doors, we have access to our deck to the right of the kitchen wall. That's where our rear porch is and basement stairs. Also, the walkway from driveway to back yard is "above" (in the drawing) the back window D and the garage just beyond that.

Extremely crude depiction.

How tall are your ceilings? 3'8" high is quite a squat window for a downstairs window.

@cpartist - Typical 8' ceilings. 3'8" will be bedroom windows. Front dining room windows (and single living room window out the front) are slated to be 4'6" as of now. Kitchen will be less than 3'8" due to counter tops + trim + outlet space. Living room is undecided and what we are trying to sort out now!

You are not going to have a great view out your living room looking at a garage. The over load of windows sounds bad period. Having different heights and widths of windows all viewed together sounds terrible. Good luck but this is a bad design. Good luck with furniture placement. When you break every wall up with multiple windows and huge picture windows that offer horrible views , someone messed up on the floor plan

I'm sure they have figured that out by now if correct @Diane Morpgew as it was 4 years ago.