Tools and Materials
Selecting a Light Switch Replacement
The easiest way to replace an old light switch is to choose a new one of the same model. Before purchasing a new switch, make sure it'll fit in the same switch box as the old one. See our Outlets and Switches Guide for help. If you want to update to a dimmer switch, see Install a Dimmer Switch for instructions.
Changing a Single-Pole Switch
Here’s how to remove an existing light switch and install a new one. For this project we're replacing a single-pole light switch. This is one of the most common light switch replacement projects for a typical home.
Follow the manufacturer's instructions for installation and safety. Check to see if you need a permit. Observe applicable building and electrical codes. Contact a licensed electrician if you have any doubts or questions about the connections or if your home's wiring doesn't appear compatible with the changes you're making.
How to Remove and Install a Light Switch
Frequently Asked Questions About Replacing a Light Switch
The answers to these common questions on replacing a light switch can help you plan your project or decide if it's a job for a professional.
Do I Need an Electrician to Replace a Light Switch?
Depending on where you live and the specific project, you may not need an electrician to replace a light switch. While it's a project that many intermediate do-it-yourselfers can take on, you must follow any building or electrical codes that apply to the work. You may need to get a permit and have the work inspected. If you have any concerns about the work or if codes require a licensed electrician, don't try to do it yourself.
Can You Replace a Light Switch Without Turning Off the Power?
No , always turn off the power to the switch at the breaker box and use a voltage tester to verify that the power's off before beginning work. At your breaker box, switch off the breaker for the circuit the switch is on. If you're not able to turn off the power or if you have any concern about turning off breakers, contact a licensed electrician.
Is It Safe to Replace a Light Switch Yourself?
If you follow proper safety precautions and any applicable building or electrical codes, it's possible for an intermediate DIYer to replace a light switch safely. Safety procedures include turning off the breaker for the circuit the switch is on and using a voltage tester to verify that it's off. The switch wiring must be in good shape and the new switch must be compatible with it. If you're unsure of any of the work, let a licensed electrician replace the switch.