A Development Permit and a Building Permit will typically be required for accessory structures over 10 m2. Depending on your project Plumbing, Gas, and/or Electrical Permits may also be required.
There are many considerations to every project such as:
Hinton's Land Use Bylaw describes rules and requirements for building accessory structures in town.
Check out the Inspections Group reference guide for guidelines on applying for Building, Electrical, Gas, and Plumbing Permits.