I'm a 24 year old male and I have grown an inch taller in the last 6 months and my chest and facial hair is only just coming in. Am I still pubescent?

One inch. Growing one inch taller at age 24 is uncommon but does happen in some people. It is possible that your pituitary gland is making too much growth hormone. You MUST see your doctor about this as soon as you can. Please keep me posted.