Another option I'm not really a fan of but wanted to include in case you know a way to modify it to something better

Any way you could put the bathroom (and a walk in closet) in the addition itself and leave the bed in the existing room? You’d have less dead space, an actual closet, and a windowed bathroom. I know you’d lose your view/floor to
Ceiling windows and to run the plumbing would be more expensive (or if it’s even possible, yet most things are possible with $$$)
In both plans you have 30-50 sq ft of dead space.

Unfortunately I can't move the plumbing that far away from the stack. I've come up with a new design that has an open glass shower and vanity- no partition walls or toilet. You think this would work? and is it practical?

Who shares the bath next door? How will you use the master? I’d prefer a toilet and sink in the master if no other options.

Use a sliding door for the bathroom, otherwise it's going to be difficult to open the door and have room for the vanity.

In the third version, I don't believe there's enough room at the foot of the bed. The closet would be 2' internal depth. plus the depth of the wall. Plus, you'd need to think about opening closet doors. Is the bed in the way?

IMO you always need a toilet in a bathroom

We would certainly suggest putting a sliding door to save you space for both the closet and the bathroom. That way, you can utilize the surrounding areas and not have to worry about swing space and be able to have everything you need in each area.

We have professional designers here that can help you with whatever it is that you need during your planning. Our doors are completely customizable and we work with every budget to ensure you have the door you want for the price that you need!

You definitely want a toilet and sink over a sink and shower if you are calling this a master and are going to the expense of an addition. This project in Barcelona is much more spacious than yours but you may be inspired by how they did the en suite bathrooms.

tangerinedoor- I was going make the closet myself with 3/4" walnut veneer and have sliding doors to save space. I calculate the distance between end of bed and closet will be 42"- do you think this is enough clearance?

LK Boken- The main bathroom will be used by my two children.

thinkdesignlive- thanks very much for the link! The glass/open washroom idea is what I was thinking as it makes the room feel larger and not chopped up.

And I don’t know where you live but in the Netherlands it’s very common to have a shower room that is only about 3’x4’ - has a wet rated door with a curb threshold. So you go in, shut the door and shower and step out into the room when done. All outlets for lights and vent are on the outside of the room. Could do a skylight in there to bring natural light in. However, I think you should look at enlarging your one bath so that the toilet and shower are in one room with a vanity in the other. This will allow at least 2 people to use these spaces independently of each other. I grew up w a family of 5 with the one bathroom you show for your kids and would consider having the ability to shower in private while someone else grooms a luxury. Doing this would allow you to have better storage in the master. At some point you have to just realize your space constrictions. I think you are sacrificing too much in the master bedroom to cram in a really small en-suite.

Important to decide on bed size as a queen will work better in one vs the other. Also important to consider window treatments and the space they require. You may want to opt for motorized shades and plan for the electrical for those as part of the build.

Lastly, a third option would be a hybrid of these two which could be the single bath and rather than a walk in closet - the long run of closets as shown on the right sketch. Good luck and let us know what you decide!

I would personally like option one that has the shower/toilet space separated with a regular closet as drawn. This way the master bedroom feels more open. I like the small dresser on the right wall for extra storage. Notice how the closet does not go all the way to the doorway. That helps with the openness.

Exactly how much room do you have north to south for the master bedroom?

Are you planning on using a queen bed?

The distance north to south is 17'. I plan on using a king bed.

Thanks for all the advice Thinkdesignlive!! How wide should the walk-in closet be?