We don’t know of any building or electrical code requirement for a minimum height of electric receptacles above the floor of a garage. There is, however, a minimum height for any ignition source in a gas appliance like a water heater in a garage of eighteen inches, unless the appliance is FVIR (Flammable Vapor Ignition Resistant) rated; and we have heard this used as a rationale for an eighteen-inch requirement for electric outlets. 

    Also, it would make good sense to put any electric outlet that may create a spark when a corded appliance is unplugged from it high enough above a garage floor to be out of the bottom area where heavier-than-air gas fumes might settle from a car in the garage with a gasoline leak; but there is no specific code requirement. 

    Also, see our blog post What are the most common problems/defects found with electric receptacle outlets during a home inspection?

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  To learn more about electrical wiring, devices, and receptacles, see these other blog posts:

 • What is the difference between what trips a GFCI (ground fault) receptacle and a circuit breaker?

• What is the code requirement for GFCI protection for receptacles near a wet bar sink? 

• What is the requirement for a service receptacle outlet for heating, air conditioning, and refrigeration (HACR) equipment? 

• Why is an opening in the wall around the side of an electrical receptacle outlet a safety defect?  

• When was GFCI-protection for kitchen dishwasher receptacle outlet first required? 

• What is allowable voltage range at a wall receptacle outlet in a house?

• When should I replace electric receptacle outlets? 

• Does an electric receptacle outlet in a storage shed require GFCI protection? 

• What are "self-contained" electrical receptacle outlets and switches?

• What is the difference between an electrical receptacle, an outlet, and a plug?

• Does a washing machine receptacle outlet require GFCI protection?

• What is the building code requirement for receptacle outlets at stairs and stair landings?

• Can I remove a 240-volt range receptacle and hard-wire the range? 

• What is a "backstab" receptacle outlet? 

• When was the current receptacle/outlet spacing of 12-feet first required? 

• When was the three-slot (grounding) outlet/receptacle first required? 

• Why does painting an electric receptacle (outlet) make it unsafe?

• Why are electrical outlets and plugs polarized? 

• How many electrical receptacles (outlets) are required in a hallway?  

• What problems does having too many electric receptacle outlets on a single circuit cause? 

• Is a house required to have outdoor electric receptacle outlets?

• How I can tell if a receptacle outlet is tamper resistant?

• Why is there a GFCI breaker in the electric panel for the bathroom shower light and exhaust fan?

• What is a false ground, bootleg ground, or cheated ground receptacle? 

   Visit our ELECTRICAL page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.