This beginner-friendly guide walks you through every step: the tools you'll need, how to wire a smart switch and installation costs. For more device-specific guidance, see our related guides on smart dimmer switches and Zigbee smart switches. Learning how to install a smart switch can save you over $100 per switch compared to hiring an electrician, while giving you voice-controlled and energy-efficient lighting that adds value to your home. Whether you're adding a TP-Link Kasa switch, a Lutron Caséta dimmer, or another brand, installing. Replacing a switch with a smart switch is safe and easy if you do it right. Next, remove the wall plate, exposing the existing 3-way switch. Test the switches with a non-contact tester to ensure nothing is energized.
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