If Condo, apply for permission from maintenance office. no necessary need to inform neighbours, unless you think the work will distrub the neighbours.
If landed, just inform the neighbours, no need to get permission from them.

that's for major renovation where you need local authorities' approval such as extension of your units or tear down rebuilt work.

For condo, usually getting permission from management office will do, and make sure you comply to the designated day and time allowed to do reno. Informing neighbor is based on good will if you feel that your reno is going to affect them

Putra Heights, i guess fall under MPSJ jurisdiction correct?
If so, then yes you need neighbour's consent. I did get my neighbour's consent when I started my renovation, as it is part and parcel of the process to get your renovation approval (the letter which you stick on the wall/doors during renovation duration).
Cheers...