Question:
If one is “somech on shulchan aviv” – financially dependent on his father, and lives in his fathers house but occasionally buys his own chametz must he do a bedikah in his fathers house.
Answer:
If in fact he owns his own chmaetz he would be obligated in bedikas chametz.
Sources:
Shulchan Aruch Harav 432:8 [who exempts household members only on account they they don’t own the chametz], Chovas Hadar pg. 121.