Advice on dealing with uneven concrete bathroom floor

Choppit

Hi,

A few weeks ago I decided to replace the vinyl floor tiles in my downstairs bathroom. They were pretty well stuck and on removing them, the tiles they were fixed to (the original 1950s tiles) started to come loose, so I decided to remove those too. Around two thirds of the way across the bathroom, the concrete floor started to lift in places and then on reaching the toilet I discovered that the pan is set on a base of newer concrete which is raised approx 1/4" above the original floor. The holes in the floor are not such an issue, however, the raised and uneven toilet base means that I can't lay vinyl tiles as is. A number of options spring to mind;

1) Have the pan removed, lift the uneven floor, lay new concrete, reset the pan.
2) Use SLC to raise the exposed part of the floor (it's only around 3m sq)
3) Fill the holes, lay vinyl
4) Have the entire bathroom refitted

#4 is a last resort. I'd likely replace the bathroom anyway in a few years, but I'd intended to deal with other more needing rooms until this happened.
#2 prefer not to raise the floor, knowing that I'd likely need to have the entire floor levelled again when the bathroom is replaced.
#1 carries the risk of breaking the pan I would think, incurring hassle
#3 would likely lead to the vinyl splitting around the pan as its quite a pronounced step

With the exception of #3 I'd be paying someone else to do the job, but if possible I'd like to avoid throwing too much money at the problem knowing that the entire bathroom will be ripped out in a few years. Anyone have any other ideas/advice?

Thanks

FreeBear

Option 2 - SLC to level the floor and provide a flat, smooth base for the tiles. I'd recommend the click-loc tiles (LVT) as they don't require gluing down so won't cause any damage if/when you lift them.

LVT tiles are expensive, but for such a small area, you'd get away with two, maybe three boxes.