Anyone Converted a Garage Into a Metal Practice Room?

I've been thinking about setting up a small practice space for guitar and drums at home, but I'm not sure what issues I should look for before changing a garage or basement into a louder music room. Things like wiring, ventilation, soundproofing, and structural concerns seem important. Has anyone here built their own rehearsal space? I was also looking into Building inspection services Citrus Heights, CA to understand what should be checked before starting a bigger renovation.