Garage floor constructed of non-absorbent, non-flammable construction.
No source of flame or glow-spark within 18" of floor.
All outlets GFCI protected.
If concrete, slab min 3.5" thick.
One hour separation from house, including scuttle.
Smoke detector required, hard-wired with battery backup.
Building Permit is required. (For more information, see "When do I need a building permit?")