Hi, hiring an Interior designer might help on visualize ur house before it built..
and knowing all the detail of your house~

by hiring site supervisor will help on time saving and problems solving...

Different charges from Interior depends on their works too...

A famous ID will cost lots compare to contractor' ID

depends on you need a drawing or not~
if you got basic idea/ magazine, just show it to contractor, they will do similar to ur ref~
But if anythings happen, there is no proof, since there is no proper drawing

If you need a designer to help you visualize and detailthe drawing, then will help up to do 3D visual drawing like:-


and detail like:-

to give you exact dimension on that

ikea is not using plywood

anywhere...trend keep chaging

normal package will include
furniture layout
3D visualize
and
2D drafting as i mention


the material will make a huge different of pricing