Making repairs and renovations to a home or business can be expensive. But if it's not done right, saving a few bucks up front could cost a lot more in the end.
The City of Bellmead requires licensed and registered contractors to apply for permits to do electrical, plumbing and mechanical work. The permits are reviewed before they are issued and the work is inspected to make sure it's done right. It's not worth the risk of fire or flood that could damage your property or harm your family! 
Watch out for the "My brother-in-law's cousin's nephew can do that cheap" approach to repairs and improvements. Hire licensed contractors. Pull the required permits. Get the required inspections.