you're always welcome

[vost]

You're welcome is used as an answer to Thank you.
May as say You're always welcome to a friend to tell them that they may come home whenever they want?

- May I visit you on Sunday?
- Of course, You're always welcome!

 

[GreenWhiteBlue]

Yes, that is entirely natural and common.

 

[rcottere]

You should note the difference between "you're welcome" <...>, the idiomatic expression, and "welcome" <...> as an adjective.

e.g.
Friends are also welcome