Height and depth should be no problem. However if the return air duct is going to be run down vertically to the side of the unit, assuming a 10" width, give or take, and room for a radius elbow transition into the return box, I'd want it at least 36" wide. However the return air setup may be different and width may not end up being as important. I would discuss with your HVAC contractor first.

Hi MoccasinLanding; thank you so much for the comments and suggestions. I do need help! My south wall refurbishment is almost a miniature/doll house size version of yours. This is the south wall of my "living room" which is a long narrow room in this old, poorly planned house. But it is ours; it is paid for, and for the next several years this will be home. It's up to me to take it from homely to homey while keeping the expenditure as low as possible. We just put in a new furnace/heat pump and A/C, so "low expenditure" has entered the realm of unbelievable. This wall is 11-ft, 10-inches wide. That's from the left side of the new closet to the far right side where the short wall starts. The ceilings are 8' tall. The window is roughly 55" square. It's replacement will be the same size. There are 19-inches of wall space on either side of the window so 18-inches is as wide as I can do for side cabinets. The useable window seat width will be about 55". The only sleeper on it will be big old Harry Hounddog. I am in North Dakota; the light from this window is what gets me through the winters. It's a life saver. I do want drawer storage under the window seat. Would you suggest 18" wide x 24" (or 30" ?) tall x 24" deep base cabinets on each side of the 55" window seat. Then top them with 18" wide, 15" deep wall cabinets? Do you have a drawing of your ideas? Or - should the window seat run from the closet wall to the right wall, about 90", side to side, with wall cabinets, about 15" deep and 18" wide, on either side? Should the window seat extend out in depth more than the closet and end cabinets? The side of the closet wall is 28" deep. If I manage to get the right size boxes, my neighbor is going to help me mock up several options. I have a round 36" table that can sit in front of the loveseat, or I could find a smaller rectangular table, similar to the oak library table I use as a desk in the office. This house did not have a single coat closet or a broom closet and this is the only place I could add one. My mops and brooms have been hanging on nails on the only open (tiny) wall in the kitchen. The vac has been in the walkway of the small mudroom. The two table leaves must be stored flat; they've been taking up valuable space in our small bedroom closet. Now with this closet I will have room for so many homeless but needed items in my house. Here's a picture the opposite, north wall. It will hold a buffet-type TV cabinet and two bookshelves. The big window is being replaced, too. The hole in the north wall held a no-longer-used air vent. It has been patched. The 60+ year old floor has just been refinished. I do love it. The room is 21-ft long from the north wall to the front of the new closet. The front door is on the right with a direct path to the kitchen, so the "useable" living room area is about 11'10"x17'. The arched doorway opens to the short hall leading to the bathroom, Bedroom 1 (my sewing room) and Bedroom 2, our office/library/den.

What is your budget? The pax system will exceed $1k. Pax would be my suggestion too. I have had pax for years and love it. I also have another system from ikea that is a pole based one and I don't like it as much as I like pax. I will try to explain what I think you can do. What is the height of the closets? Pax allows you to get rid of dressers since you can use drawers and pull outs. For the nursery closet, I would use three 29" pax units across the back. What will you store in this closet? Pick and choose as many fittings based on what you would store in it. I would add a mirror on the side walls and hooks on the other side wall for hanging items. The pax units that I am referring to are 24" deep. For the master bedroom, I would use two 39" wide pax units that are 24" deep on the 80" wall. This will give you space to walk into the closet and pull out items in drawers or pull outs. I would repeat this in both closets so each person has their own setup. You can always add accessories as you go along. For the laundry closet, I would deviate from Pax. I would keep your washer and dryer unstacked. I would place the washer and dryer pair on the wall that is 80" deep. Most front loaders are smaller than 30" wide, so I would purchase a 18" wide base cabinet from sekton to store all my laundry products and other supplies. It could also house tools. I would find a countertop to go on top of the washer and cabinet. The wood counter from ikea for an island should be deep enough or you could use the laminates depending on your style. I would use two 39", 15" high sekton wall cabinets on top of the washer dryer and base cabinet. Check with the plumber to see if you can place the water outlet and shutoff valves on the side of the wall. For the other wall in the closet, I would look at Elfa for their 12" deep wall units. This could hold the vacuum cleaner, cleaning items like brooms, etc.. You could also put some drying hooks on the back all in the laundry closet. I will try and post a picture later. Laundry hampers and baskets can also live on this wall. Good luck!

Would something like this work? More closet space. Shower length might be 54 inches depending on exact measurements.