Is Your Kansas City Home Still Running on Knob-and-Tube Wiring?

Kansas City has a lot of housing stock built before 1950, Brookside, Waldo, Roanoke, Volker, Pendleton Heights. A good share of it still has some original knob-and-tube wiring behind the walls. Here's how to tell, and why it matters.

What Knob-and-Tube Wiring Actually Is

It's an early wiring method, common in homes built before the 1950s, that runs individual wires through ceramic knobs and tubes instead of the sheathed cable used today. It wasn't a poor design for its time. It just wasn't built for how much electricity a modern home actually uses.

How to Tell If You Have It

A few signs worth checking:

• Your home was built before 1950. Not a guarantee either way, but the biggest predictor.
• Ceramic knobs or tubes visible in an unfinished basement or attic, where wiring often runs exposed.
• Cloth-covered wiring instead of the plastic-sheathed cable used in newer construction.
• No ground wire on your outlets. Knob-and-tube systems don't include grounding, so two-prong outlets (or three-prong outlets without an actual ground) are a common tell.

If you're not sure, this is a quick thing for an electrician to confirm during any other visit. No need to open up walls to find out.

Why It's a Real Concern, Not Just an Old-House Quirk

• It wasn't designed for modern electrical loads. Today's homes run far more devices and appliances than a 1930s or 1940s house was wired to handle.
• The insulation degrades over time. Cloth insulation becomes brittle with age, which raises fire risk, especially if the wiring has been covered by modern insulation (it needs airflow to dissipate heat, and blown-in insulation over knob-and-tube is a known hazard).
• No grounding means no protection for sensitive electronics, and it limits what safety devices (like GFCI outlets) can actually do for you.
• Insurance. Many homeowners insurance carriers either won't write a new policy on a home with active knob-and-tube wiring, or require it be replaced within a set window after the policy starts. If you're planning to sell, refinance, or switch carriers, this comes up fast.

What Rewiring Actually Involves

Full replacement means running new, properly grounded wiring throughout the affected areas and updating the panel to match. Scope varies a lot by home: some houses have small isolated knob-and-tube sections from a past partial upgrade, others still have most of the original system intact.

Cost depends heavily on how much of the home is affected and how accessible the wiring is (finished walls cost more to work in than an open attic or basement). If a panel upgrade is part of the picture too, our panel upgrade cost guide breaks down what drives that piece of the cost separately.

Our Approach

Every wiring job is done by a licensed master electrician, with an upfront, written quote before work starts. No scare tactics, no pressure to redo more than your home actually needs. If a full rewire isn't necessary yet, we'll tell you that too.

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A-Team Electric is a licensed, master-electrician-led shop serving Kansas City, Gladstone, Liberty, Independence, and Lee's Summit. Upfront pricing, same-day service.