What is a grounding electrode and what does a typical home need?
NationwideReviewed October 2026
A grounding electrode is the metal connection between your electrical system and the earth, such as a ground rod or rebar in the foundation. Inspection checklists from the City of Austin and Washington State list common options: a concrete-encased electrode (often called a Ufer ground) using at least 20 feet of 1/2-inch rebar or #4 bare copper in the footing; two 8-foot ground rods driven at least 6 feet apart; or ground plates buried 30 inches. Rods must be driven flush or below grade. Washington requires the concrete-encased type on new buildings with permanent foundations. Which electrodes are required depends on your foundation and local rules, so confirm with your inspector before pouring concrete.
Check your local rule. This varies by state, county or city. Your permitting office has the final word; the official lookup pages below show you who that is.