A building permit is required for any project where you're planning to change the structure of your house and for most new structures on your property. This could include adding drywall or taking out a wall. If you're only ripping up carpet, adding a tile backsplash, or painting a room, you don't need one. As a homeowner, you're able to do basic building projects in your home with a permit. Many projects that include an electrical, mechanical, or plumbing permit will also require a building permit.