Locate the circuit breaker or fuse that controls the outlet you plan to replace and shut off the power to the circuit. Plug a lamp, radio or the GFCI tester into the outlet to test for power and make ...
According to Angi, the typical range for changing outlets to GFCI costs between $130 to $300, depending on the number of outlets, installation location, hourly labor rates, and any additional fees. On ...