Who do I hire to embrace a wall and put up a strange door on the subsequent wall? Is it General Contractor?
Answers: no, a general contractor oversees and organize your construction plans (i.e. putting on an addition, finishing a underground store, re-doing a kitchen). if you're only looking for that one specific wall project, hire a carpenter.
I am a Realtor and I own the number of several local handymen who do that. I frequently have folks ask me for name and numbers. I know that others in my organization have different guys that they use, too. You may want to christen around and ask Realtors, hardware stores, etc. for names. Always check reference. To answer your question, sure you can telephone call a general contractor. You may remuneration twice as much. I had a customer receive a similar service that you described (build a wall and insert a wall). She used a handyman contained by our area (Oklahoma) and it cost her $400. He cleaned up and removed driftwood afterwards, but she had to paint both sides of the unsullied wall herself.