I am in the midst of renovation 'process', ie awaiting submission of plans to local council which seem to be closed throughout this whole pkp, pkpb period. Not sure if my situation is the same as yours. I am extending back and sideways. I think for straightforward extensions to intermediate house, local council's do provide pelan setara, but I am not sure if relocating toilets/rooms would come under straightforward renovations. You may check at the local council office and ask them.
Mine doesn't come under standard, so I managed to get a draftsman to do the drawing of the plan. ID would cost a whole lot more, so since I have roughly an idea of what I want, the draftsmans drew up the plan and after many edits, we finally agreed on one. He would also ensure that it is within the council's requirements. Draftsman will also be submitting the plans to the local council for approval, after which the renovation can start. The draftsman will engage structural engineers etc if needed. Fees depend on complexity of the job. ID would reduce your headache to figure out flow/design but some contractors can do simple ID as well I think. Need to figure out your budget for it all. All the best.
Below is example of local council pelan setara.

http://www.mbsa.gov.my/ms-my/mbsa/perkhidm...m6rDQ1JHySEASNg


This post has been edited by Dfuzzy: May 29 2020, 05:18 PM