Do I need permission for this?

A fall and broken leg has precipitated my mum's move out of her unit, which I own, and into aged care. I now need to do some renovating in a hurry, to make the unit rentable. I want to rip out the old bath and replace it with a shower alcove and fittings for a washing machine and dryer. This will probably mean retiling the whole bathroom, possibly including the floor.

It's a strata unit. Do I need to inform the body corporate? If so, is this just a matter of courtesy, or do I need their approval to do the work and, if so, what do I have to submit to them?

I've also ripped the carpet out and intend polishing the floor. Same story?

Thanks in advance,

Steve = : ^ )