I did a similarly sized bath addition and the area seemed too big for just a bathroom but was also not quite big enough for both a good size closet and nice bath so we prioritized what were the items most important for us. Bathroom area trumped closet space for us and we ended up using nice reaching closet wardrobes instead of a proper closet. They stay so neat compared to my last walk in area and I will now always opt for this setup over a walk in closet with open shelves.

We also never use a bath tub so opted for a large shower with multiple heads instead of a tub and less roomy shower. What are your priorities and reasons for adding the bathroom and closets? I think you might need to figure out which features are most important for it is a bit small to fit it all without sacrificing both spaces.

Do you need a tub? Would you mind reach in closets? Can the door be move?

Honestly, with today's ventilation I see no issue with closets in bathrooms, honestly Do your tp rolls or towels get musty when stored in a bathroom? My mirror does not even get steamed when I take a twenty minute steamy shower using jets...

I have my wardrobes incorporated into my bathroom. Actually, when we realized 103 sq ft was not enough room for a walk in and a nice bathroom I went for an old fashion dressing room concept. Back when my house was built they did not have ensuites but the master bed room often had a side room with a sink and wardrobes so I designed my new bath after these rooms. I love showering and dressing in my large beautiful private from the yard new bathroom more than I would have liked two ok but tight and not great separate spaces....

That's a really great point. My towels, medicines, and toiletries are all just fine. Did you take 1 wall of your bathroom and make it into a wardrobe?

I've been playing with layouts again for the last few hours, using other threads as inspiration. Here are 2 other ideas that I think could work.

The first one creates 2 parallel rooms, each with a door into the master bedroom. The master bedroom would be to the left of the page. I know it's crazy to put the windows in the closet, but my husband insists that the not be over the tub, and I couldn't find a way to make it work without doing that. He does not believe me that this was a fairly common thing back in the day.

The second has you walking through the closet to get to the bathroom.

I forgot to note in my original post that the house was built in 1900, so we are looking at more traditional fixtures, like a console sink.

If the toilet can go under the small window, it opens up some options.

You need 3' for walking within a closet and 2' for hanging clothes. That means you need a minimum of 5' in width for the closet which you don't have and you certainly don't have room for cabinets on two walls like in your drawing.

Your space is 11' 1 1/2" wide.

Make the bathroom 5' 1 1/2" wide which is the minimum. That leaves you 6' for the closet. That allows for 2' of hanging on the long side, 3' of walkway and 1' of shelving on the opposite side.

Additionally you want the door into the closet and bathroom to be at the foot of the bed, not up at the person's head.

I would hate the door swing into the sink area in cpartists drawing. I also do not like to have a toilet so near my showering egress, this is just a silly idiosyncrasy of mine. Do you prefer a walkin closet to a decent master bath? If so cp's ideas with a pocket door would work for you. I prefer my breathing room in the bathroom rather than a closet.

my reach in pax wardrobes are not all lined up on one wall but rather we have his and her sides with mine flanking my side of a vanity and his flanking his side...it is unconventional but after realizing that fifty square ft was not enough for a good bathroom nor closet it was our best compromise.

after having very little closet space in my 1920 home I find my set up really nice. Here were my inspiration pics where I got my idea to incorporate a dressing room into a shower room. in the 20s,when my house was built, the master would not usually have a bath attached but many had dressing rooms with wardrobes and sinks. I did not want my bathroom to look like a bathroom but rather a dressing room from my bedroom.

From a Sears kit house plan.

although I did not copy this cool set up I emulated the idea of two closets flanking a sink dressing area.

Here is my sink flanked by 60" of wardrobes on each side. My room is 13x8 with Windows on all three exterior walls. 3x6 shower behind the bench could be a shower tub combo easily.

I like Cpartists's plan, but I suspect your husband will not since it has a window in the tub. Here are two more ideas. The first one is a smaller walk in closet, but 7 feet wide and gives you 9 feet 2 inches of hanging space. I put the door to the bathroom at the entry from the master bath so you do no loose wall space in the bathroom.

The second plan gives you more storage with a linen closet accessed from the hallway. You can do a reach in closet in the bedroom for yourself and another in the bathroom for your husband. For cost savings, use small doors in the closet that open into the room and take up less space. Instead of a closet in the bathroom, you could do an 18 inch deep cabinet on that wall to hold underwear, socks and other items.

If you flip Cpartist's plan and do an entry into each room separately, you would avoid windows in the shower. No window in the bathroom either though. You might want to do an out swing door that opens into the bedroom for the closet. I had that in one house and though I did not like it, it worked. I usually left it open unless company came over. That would allow more light into the bedroom and you would not block the window with the door and you could put a narrow shelf there under the window.

can you have multiple doors? I got the impression you did not want to add more than one door from the bedroom into new space.

if not maybe more like this.