Gasoline is one of the most flammable liquids there is. Its vapors are completely invisible, very heavy, and will secretly travel like a snake from room to room. That's why you should never store gasoline inside your home or basement. Always keep gasoline cool, stored in a tightly sealed, approved safety gasoline container that is prominently labeled and out of reach of children. Keep this container in your garage (detached is preferred) or an outside storage building.
Adding a yard shed to your backyard not only provides a space for your yard and garden equipment, it gives you a welcomed bonus. With these items stored elsewhere, you will have gained valuable room in your garage for woodworking or other home projects.