Budget and structure are pertinent when moving toilets. What is under the bath, specifically where your new tiolet stacks would go, presently? The proposed plan could cost well over 75k to construct two new full baths depending on fixtures and structure. Have you consider the love it or list it question?

Is the tub really necessary? Most older children and teens prefer showers, that would save you a lot of room. roarah is absolutly correct about spacing for toilets and drain stacks. This is an expensive project so consult both a bath designer and general contractor to aave money and headaches in the long run.

Have to make assumptions since you don't have the rest of house shown. But typically a Powder Room is used for the rest of house (guests, easy access from outside, etc). You have changed the Powder to a wet room, or forcing use of the other bathroom instead for that function (but both baths still open to the hall or whatever).

If you now have two full baths, one should probably be made an ensuite to a bedroom. And a wet room is probably not the best decision without knowing any other information.

Converting a 1.5 bathroom into two separate bathrooms is a great idea to provide your teenage kids with their own personal spaces. If you would like one of the bathrooms to have a bathtub, here are a few alternative suggestions to consider. First, you can expand the existing bathroom by utilizing adjacent space. This option would provide enough room to accommodate both a bathtub and other essential fixtures. Another option is to combine the current bathroom with an adjacent room, such as a small bedroom or a walk-in closet. This would create a larger, more functional bathroom that can accommodate a bathtub. If you're open to alternative options, you could also convert the existing bathroom into a three-quarter bath. This involves removing the bathtub and creating a larger shower area. With the additional space gained, you can then create a separate, smaller bathroom with a bathtub. Lastly, if having a separate bathtub is not a strict requirement, you can consider installing a shower-tub combo in one of the bathrooms. This would provide both showering and bathing capabilities in the same space, saving room. It's important to consider the layout of your home, the available space, and your budget when deciding which option is best for you. Consulting with a professional contractor or designer can also provide valuable insights and help you make an informed decision.

If you have any other questions or need further assistance, feel free to let me know!

I think the only way to do this would be to take down both walls--the one that separates the two baths and the other that separates the tub/toilet from the vanity to make the current full bath smaller and convert both bathrooms to showers, only. It can probably be done, but it won't be inexpensive. Get a professional consultation on this to make sure that wall can be moved. I'd also do pocket doors vs. swing doors to save space.

By the way, I have a 17yo daughter and nearly-16yo son, so I understand your situation. And my daughter only takes baths, as she finds it nearly impossible to wash her thick long hair in the shower!

Could you take the top bathroom with 6x12 measurement and move toilet and sink to where door is create an en-suite there?

I would love to hear if you are still working on this project! Here is another option, very budget-friendly, just moving the sink, installing a shower, and changing the swing of the door on the current powder room. No changes to the existing full bathroom, unless you want to tackle installing a pocket door to the tub/toilet room (a barn door would be a simpler option with the same space-saving effect). This is a shallow-depth vanity and 36" corner shower unit.