GARAGE ATTIC LIFT STORAGE - AN OVERVIEW

I suspect this is the signifies to collect more taxes from me for the "concluded" garage (residing House) , and never a "lawful"code necessity. I'm a mechanic and I make use of the exposed studs to put in shelving & equipment. The permit I used for & obtained was for "lights & storage". There is not any plumbing or HVAC. Would I be Improper to "pus