New investor in Hosuton tx

[Dalton N Green]

Hello I am 21 years old and am buying a 4 bed 3 bath home to house hack, I plan on converting the garage into a bedroom where I will stay and rent the other 4 bed rooms out. I don't know where to look to see if I need a permit or anything in order to convert the garage, also if any one can tell me where to find fair housing laws to see if I can even have that many people under the same roof