Getting permits for a house renovation in Maryland

[Jingmin Zhang]

Hi all, I just bought a new house in PG county, Maryland that needs lots of renovation. Particularly, I want to change a former morning room (which does not have foundation) to a master bedroom (which requires foundation). As far as I know, I need to get the following permits for the project: building, electric, plumbing, H-VAC. Is there any permit that I'm missing? I want to get the building permit myself and let the general contractor get the others. But I am concerned whether I would be held responsible for any aspects of the renovation if anything goes wrong. 

Thank you!