Is it possible to change the standard HDB switch to those nice flat/big button ones? Without doing damaging the wall, etc. Is it expensive?

Hi,

Its possible to change to the new flat/big buttons but you would still need to have the backing on the switch.

If you are choosing other colors instead of white, it might look pretty ugly.

If you do not want the backings, you might want to ask your installer to hack into the wall to hide the cablings but i think its not legal.

Cheers!

Change to big buttons is just changing the front plate.

The box behind still remains, you can't fix it flat to the wall unless you can do hidden wiring?