Slab damage

Yes, any damage is an issue in new build.
Yes, because reinforcing steel is exposed

Im trying to figure out what's going on in that first photo. Am I correct that it's an alfreso? if it is why does it look like there is a rebate underneath it?

The fix will depend on what the slab is being used for ie in that second photo if that is just a corner chipped of a porch then the fix is pretty basic. The reo can be painted to protect from rust and the slab patched with structural grout and then it will be screeded and tiled.

For the first photo I need more information. It may be just a cosmetic clean up needed, but I could be wrong without context

I think it's fixable. Most things are in construction


It will need some engineering advice but my guess is that they might be able to drill some reo into the end form it up and pour that section cause it looks like a massive chunk. pretty poor work but my opinion won't help you solve it.

What has your builder told you?

You might also want to raise the issue of the rear wall frame (structural element), as it's non-compliant the bearing on to the slab is a problem with that much overhang of the slab.

Angle brackets to support overhang.

Geez tips? How long is a piece of string?

Do much of planning (know what you want and needs) things are usually not as easy as you first thought, and ask the question's early, no dumb questions and even ask what hurdles they foresee.

You have to understand, its just a job for them and its your everything, so you have to take the reigns.

Good luck.