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Drawings for new bathroom.

The bathroom is being built in a completely new place so needs drawings for a building permit. It is in two adjacent rooms one of 2.6 x 1.5 meters containing laundry and HWC. The other 2.6 x 2 containing toilet, shower and vanity. The drains need to run behind false walls or in the case of the shower under a raised plinth. The floor is concrete and cannot be dug into. I will be doing all carpentry myself. I have a registered plumber lined up to do the plumbing. It is the drawings that I need, with the associated plumbing specifications. I have attached my attempt at the drawing.