Alcove in existing room

[Gazelle0304]

Hello!

I want to create a wooden alcove in a bedroom of our chalet built in northern pine.

Has anyone already done a work of this type, I had even considered getting (if possible) a granary?

The object of this message is to know the "rare pearl" who has self-built this kind of cozy nest !! and to explain the technique to me, we are a small family "addicted" to wood ...

Thank you for all your interesting answers. See you soon!