Construction - DIY - Basement Floor?

I don't understand the dirt under the tile. Tile should of been laved on concrete. The old tile shold be scraped off the concrete and any cracks patched. Once this is done get a free estimate form a carpet company. They can fix the unevenness when they lay new carpet.

Call your homeowners insurence company before doing any work.

well those tiles are most probobly asbestos but i wouldnt worry so much about that. like you said there are alot of techniques used, depending on how much experience you have with masonry you might be able to do it yourself. but the easiest way to do it (just happens to be the most expensive) is to use self leveling cement its expensive i think like 15 bucks a back and you'll need alot of bags and you gotta mix it and pour it its a big job i would hire a contractor cuz you should also put in a sub pump to make sure you dont get water again cuz there is a good chance you will, you should probobly hire a contractor it might cost a little but if you want it done right thats your best bet!

In this case, leveling the tile really takes lot of time on you really earn cash from it, but this will successfully made your basement floor looks better and yes you can do DIY if you start leveling it just look for some steps and instruction on how to do it well.

If, you have enough ceiling height, lay 6mil plastic, install leveled sleepers and plywood for a new subfloor, then lay your new flooring on top. Weekend warrior project.

Any water will run under the plastic towards your sump pump.

Not the cheapest way, but the best way.

Otherwise, flatten your slab, by using subfloor compound, make sure it's pitched towards your sump pump. Then install a quality plastic type laminate flooring.