A son wishes to move out of his father’s house with his wife to live separately, is this allowed? ―Shaikh Ibn Bāz

A son who lives with his wife in his father’s home, and cannot settle down properly and achieve a comfortable life under the same roof―then there is no sin upon the son to live separately with his wife away from his father’s home in a house of his own so that he can attain comfort and settle down. And this must be alongside fulfilling the rights of his parents, maintaining family ties and not severing them.

(See Al-Jāmi’ fī Fiqhil-‘Allāmah Ibn Bāz, p. 1169)