Light Switch & Dimmer Installation Cost in Seattle

How Much Does It Cost to Install a Light Switch or Dimmer?

Swapping out a light switch is one of the fastest jobs an electrician does. Whether you want a dimmer for your dining room, a smart switch for your porch lights, or need to fix a switch that stopped working, here is what homeowners in Seattle, Renton, Newcastle, and Bellevue can expect to pay.

Switch Replacement & Installation Pricing

• Replace a standard toggle switch: $75–$125. Direct swap, usually done in 15–20 minutes.
• Install a dimmer switch: $100–$175. Replaces a standard switch with a dimmer. Verify LED compatibility first.
• Install a smart switch (Lutron, TP-Link, etc.): $125–$200. Requires a neutral wire — most homes built after 1985 have one.
• Install a 3-way switch: $150–$275. Controls one light from two locations. Costs more if new wiring between switches is needed.
• Add a new switch where none exists: $200–$400. Requires cutting in a box, running wire, and patching drywall.

When to Call an Electrician for a Switch

You should call a licensed electrician if:

• The switch feels warm or hot to the touch
• You hear buzzing or crackling from the switch plate
• The switch sparks when flipped
• Lights flicker when using the switch
• You want to upgrade to a dimmer or smart switch and are unsure about wiring

Dimmer Switch Compatibility

Not all dimmers work with all bulbs. LED bulbs need an LED-rated dimmer. Using an old incandescent dimmer with LEDs causes flickering, buzzing, and premature bulb failure. A licensed electrician will install the correct dimmer type for your lighting setup.

Multiple Switches? We Offer Volume Pricing

If you need five or more switches replaced in the same visit, we offer per-switch pricing that brings the cost down significantly. Many homeowners in Renton and Newcastle bundle switch upgrades with outlet replacements to get the most value from a single service call.

Had all the switches in our living room and dining room upgraded to dimmers. The electrician was done in about an hour. The lighting in our home feels completely different now. Great value.

- Newcastle homeowner, March 2026

Get a Switch or Dimmer Installation Quote

Call 425-210-4791 or request a free estimate online. Same-day and next-day scheduling available throughout King County.