I'm currently almost done with a full bathroom remodel/rebuild. The old toilet was leaking, and caused the floor to get soft, and we hadn't used the tub in ages.
I tore everything out down to the studs on the floor, walls, and ceiling, replaced all the electrical, and plumbing. I hung, mudded, taped, sanded all of the drywall, and installed a new floor that was 2 layers of 3/4" plywood, and then laid down new lino. There are new LED can lights in the ceiling, and a 4 bulb fixture on the wall over the new mirror. I put a 5'x3' shower base, with surround walls, and mounted all the new fixtures with PEX line that had to be connected to our old copper water lines. I replaced all the drains, and traps in the basement all the way to the septic tank, ran new supply lines for the toilet, sink, and shower, and had to strategically drill new holes in the new floor to route them in the proper places. My wife painted the whole room, and I still have a barn style sliding door to build in the next month or so for privacy.