Knob and Tube Wiring Replacement in Portland, Oregon

If your home was built before 1950, it may still have knob and tube wiring. Many homes in Portland neighborhoods like Sellwood, Laurelhurst, Irvington, Alberta Arts District, and St. Johns were originally wired using this early electrical system.

Smiley Electric provides professional inspections, partial upgrades, and full rewiring services throughout Portland, Beaverton, and Hillsboro.

What Is Knob and Tube Wiring?

• Ceramic knobs secure wires along framing members
• Ceramic tubes protect wires passing through wood
• Cloth-insulated copper conductors
• No ground wire

Why Knob and Tube Wiring Is a Concern Today

• Deteriorating insulation
• Overloaded circuits from modern electrical demands
• Improper splices added over time
• No equipment grounding conductor
• Insurance limitations or denial of coverage

Your Replacement Options

Option 1: Targeted Circuit Replacement – Replace specific circuits and abandon old wiring where accessible.

Option 2: Full Home Rewire – Replace all knob and tube wiring with modern grounded NM-B wiring, upgrade panel if needed, and complete permitting and inspections.

Typical Investment in Portland

• Partial replacement: $3,000 – $8,000
• Full home rewire: $12,000 – $25,000+
• Final cost depends on size, access, panel condition, and number of circuits

Why Portland Homeowners Choose Smiley Electric

• Licensed and insured Oregon electricians
• Experienced with older Portland homes
• Clean, respectful crews
• Upfront pricing and clear communication
• $95 electrical evaluation option

Not Sure If You Have Knob & Tube Wiring?

Book a $95 evaluation today to receive a clear plan for safe upgrades. Serving Portland, Beaverton, Hillsboro, Lake Oswego, Tigard, and surrounding Oregon communities.

Or call: 503-484-7556