new bathroom

Bought a house built in 1955. It had 3 small bedrooms upstairs and 1 full community bathroom, so decided to make a master suite using one of bedrooms and converting it into a walk-in closet and bathroom. Working on the plumbing for it. Toilet, tile shower and double vanity. I’m pretty handy, but...

I'm adding a small bathroom addition to my house and I'm not sure the best way to set it up. Here is a rough sketch on what I came up with but I'm not 100% sure if it will work. Any advice would be greatly appreciated.