House building plan

Hello! With the help of Google SketchUp, I have drawn a plan of my future house. Should I order an official project, or can I use this plan for the construction of the house? Thank you!

Uh ... what do you mean by ordering a project? Of course, you need someone who is authorized to submit building applications. And then you need someone who, with expertise, designs structural calculations, wiring plans, connection details, roof details, execution details. And so on.

Joker

Can I do all of this myself or DO I always HAVE to hire this someone?

As a doctor, you certainly do not have the authorization to submit building applications. So yes, you have to hire someone!

Commission and NOT hire.

EDIT: I already wrote ... expertise is necessary. Regarding your further questions, I doubt that you have it for house construction ;)