Well, if you can afford that setup, I would plan on the girls each having their own clothes, and simply borrowing if the other sister is ok with it. Having five daughters, I know all about sharing rooms, closets, clothes, bathrooms, etc. For example, my first two were fifteen months apart and were best friends through high school (in the same grade.) However, the younger one was a slob and older onewasn't, and they had different tastes in clothes. The younger was careless with the other's clothes. Her sister would have hated to have to share everything with her. My point is that I would give them each their own closet, since they will likely want to have their own clothes, anyway. Then, they can learn to ask to borrow an item. I also wonder why you are including a tub and shower in a children's bath? Even though the bathroom is a nice size, I believe it will feel cramped. I think I would give each child her own vanity and toilet, and include a shower/tub combination in a separate middle room. And, when your kids are teens, you might regret giving them their own doors to the outside! :)

I like my first idea best as far as use of space. I know people say not to put toilets on an outside wall. We had one in our last house in Iowa, but we had 2X6 construction. I don't know how high your window is, but I'm guessing the toilet would fit under there. The shower would be 5 feet long or shorter if you want a wider space to get to the toilet. (kind of tight the way I have drawn). You could do a 5 and half foot long shower and do an angled door at the left end to allow room between the shower and toilet. The vanity would be about 7 feet long, unless you do a 60 inch vanity with a linen cabinet at the door. I would reverse entry door swing if you do that.. The second top right could work and you would still have a small closet. The bottom left plan would require waterproofing your front window. Hopefully someone will give you other ideas. The bottom right plan is bigger, but no closet. Each square equals 1 foot.

Thanks again for taking your time on this. Extending the wall out to line up with the kitchen adds another 3'5" to the room. I've considered this. It would look about like this: My hesitation is what it does to the dining space. I've actually set up my sideboard/dining table as if there was a wall there and it just messes with things enough for me to not love it. It causes the dining table to be pushed towards the living area so it no longer lines up with the middle of the kitchen/ island and it cramps the space a bit horizontally (in the floor plan photo) which feels weird since there is so much space vertically. At the end of the day I'm sure it would be fine but maybe there is a better option. The bedroom door I put on the closet side because I thought it would mess with potential furniture placement too much if placed on the master side. I also have considered putting a door at the end of the new hallway to separate the bedrooms from the rest of the unit, but I think that might be odd since the 2nd bathroom/powder room is within that space. This is not a forever home for us I'd be shocked if we still lived here in 10 years. The second master as drawn is about the minimum width I would want for a walk in. It's 6'2" wide which for me is good for a hanging on one side and shelving/some drawers on the other side. Putting a reach in closet for the kids in the space I have allocated for the 2nd master closet is an option. But it seems to limit our options for more master bedroom closet space in ways that I do not really like. The first master is 7'2" x 8'8". So not really enough width to do as you suggested. We could put a 7' wall of wardrobes on the current wall just outside the closet but won't that look bad when entering the room? Alternatively, as you say, if we split the proposed master into a kids closet and a master closet (or wardrobes), the master side will be facing the foot of the bed, which I don't love in general + we do watch the tv some in bed and it makes that quite awkward. I don't think the dual walk in closet option is doable. There just isn't enough space. I guess we need to figure out what compromise is the best for us. I had thought the smaller bedroom would be fine but thank you for making me really analyze it.

Eric, If you search Mudroom here on Houzz, you will see all sorts of pictures. The one that I dream about has cubbies with hooks and shelves for each member of the family. A lot of mudrooms incorporate the laundry in this area as well. This is great for when your child plays sports and comes home from a game in their uniform that is muddy. You can have him/her strip down in the mudroom and the uniform can go straight into the wash. With the cubbies, all of the regularly used items, jackets, backpacks, sport equipment can be stored there out of the way and out of view. I am not a pro, but I took the pic of your floor plan and played with it a little. I have no idea if all of this is possible, but hopefully it helps you look at it from a different perspective. I re-arranged the bedroom and laundry area to incorporate a large laundry and mud room and a wider hallway. By removing the laundry from its current location, it expanded that bedroom and makes better use of the space in my opinion. I also re-arranged your kitchen to give you a better casual dining area. With kids, you need a space where the family can sit and eat on weeknights. Sure you could use your formal dining, but the kids just get everything messy, so I think it is better to have an area where it is easy to clean and lessen the chance of them ruining good linens or area rugs. I also opened up that wall to allow quick access to the Master. It doesn't make sense to me to have such a long walk from the kitchen to the Master. I don't know how you feel about that hallway, but by adding that opening in the kitchen wall, you could eliminate it altogether and expand the kitchen and/or that bedroom even more. I also did a few other tweaks that I would want to see if it were my house. One being the powder room, there are several other bathrooms including one right next to it, so I would rather that be the coat closet serving the main entry. I did lose the walk in pantry, but am guessing that a talented kitchen designer could configure cabinets with pull out drawers that would serve that function for you. I also removed the door to the toilet room. If that wall is load bearing, just make it open. I think it is unsanitary to have to open a door before washing your hands. This is not perfect by any means, it is an awkward layout because so much needs to go on one side of the house. If it were possible to move plumbing, it would really expand your possibilities. Hope this was helpful to you!