Check out the link for the website of garner NC:
http://www.ci.garner.nc.us/ and click on Departments tab then Planning. In the FAQ portion:
Is it necessary to get approval from the Planning Department before locating a business in your
home?
Yes. Request a Zoning Compliance Permit for Home Occupation. Included in the package is an information sheet, the application form, a form listing the General Requirements for a Home Occupation business, and a piece of graph paper for drawing your own house and/or house and yard plan. If you have any questions contact the Enforcement Planner.
Most likely it depends on the zoning of your home.