Hey all, am planning to do an extension of my new intermediate 22x70 residential lot backyard (for wet kitchen); extend by a further 5" width x 22" length x 12" height, fully covered with red brick wall and roof.

Looking for advice on the permit procedure under MPAJ guidelines.. if I plan to do the submissions on my own, do I need to engage a LAM draftsman to endorse my plan first then submit the endorsed plan to MPAJ for approval?

Already have a prospective contractor but not sure how the interaction between contractor and the draftsman will be like etc... contractor knows my exact plan but if i engage draftsman need to have another round of site visit and measuring by draftsman? What if draftsman has different technical advice vs contractor? Sorry total noob here and confused with different advice from multiple parties...