Do you mean the maids space? IMO that is the place where the powder room needs to be and then the maids space reconfigured which BTW should have its own bathroom

I think your idea of moving the door to the powder room so that it faces a relocated door into the second bedroom is a good solution. Is that a cabinet/closet at the end of that access hall to the second bedroom? That would have to be relocated, no? But to keep the door to the powder room out of the dining room, your idea is a good one.

You actually have 4 bathrooms in that small apartment? Wow.

I'm not sure what you mean by "pre-build apartment". Do you mean that you can modify the layout because it's not built yet? Or do you mean, is was pre-built and then you bought it?

If it's already built, solve the problem by just keeping the door to the bathroom shut.

If it's not already built, then I would solve the problem by combining the 2 adjoining bathrooms into one space, accessible from the bedroom. That's what I would do.

The closet for this bedroom would be in the hall so you would need to address that either by wardrobes in there or a new closet build. This closet in the hall outside the bath could stay as a closet or be converted to a console table with art or a mirror.

Is this in Philippines? Will you have a maid?

Building on thinkdesign's idea, can you turn the closet to open from the ensuite bathroom? Or is that a freestanding wardrobe?

@Mrs. S Quite a different idea from what I've thought of - but very good; I realize it'll cost more than the other solutions, but an idea of combining those 2 bathrooms into a single bathroom (and add perhaps a tub). Then @Patricia Colwell Consulting is also right in saying that the the Maid's T&B is where the powder room needs to be. I don't have a maid and only 2 of us living in the apartment so it might be workable.

@bpath Yes, this is in the Philippines and I will have several years (till 2026) to figure this out before I can move into it.