Whats this kind of job called?

like, when you make the deign for inside the the house.

idk how to explain it.Like you say where rooms and the front door and stuff are going to be.

like you make the blueprint.








Artech
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Interior designer. But since you say where the rooms are going to be & blueprint, then architect. It's two completely different things although I've known one or two people who do both, but this is an exception rather than the norm.
Interior Designer.
archetect/ building designer
residential architecture hope i helped :)