Knob-and-tube wiring and your insurance

A 1912 house on the near west side prices well, inspects reasonably, and then the insurance quote arrives and the deal stops making sense. Almost always the same cause: someone found knob-and-tube in the attic.

The wiring itself is rarely the expensive problem. The insurance treatment of it is, and it is the part operators discover last — usually after the inspection period has closed.

What it is, and what actually worries people

Knob-and-tube is the original residential wiring method: individual conductors run through ceramic tubes where they pass through framing, supported on ceramic knobs, with no ground conductor. In a house of this era on this side of town, it is not a surprise. It is the default.

Intact, undisturbed, correctly loaded knob-and-tube is not a fire waiting to happen. Three things are:

It has no ground. Every modern appliance assumes one. So do the receptacles somebody has probably already swapped to three-prong without adding one, which is a real hazard and a common inspection finding.

It has been modified. Ninety years of owners have extended circuits, spliced into it, added receptacles, and run it to loads it was never sized for. The original installation is not usually the problem; the 1978 addition to it is.

It has been buried. Knob-and-tube was designed to shed heat into open air. Blown-in attic insulation over the top of it removes that, and a previous owner's energy upgrade quietly became a heat problem.

That is what an inspector reacts to, and it is what an underwriter is pricing.

What carriers actually do

Here is the part worth knowing before you write an offer, not after.

Most standard carriers will either decline the risk or write it with conditions — restrictions, higher premiums, and a mandatory upgrade timeline. Standard-market pricing on a knob-and-tube house is frequently just not available.

Surplus lines carriers will generally write it. That is the fallback, and it is not free: commonly two to three times standard premium, deductibles of $2,500–$5,000 or more, and sometimes an explicit condition that the wiring is replaced within six to twelve months. Read that last one carefully. It converts a "someday" capital item into a dated obligation attached to your policy.

Where a FAIR Plan exists, it will typically cover basic fire perils. That is usually enough to satisfy a mortgage lender while you arrange a rewire, and it is a bridge rather than a destination.

The operator mistake is treating insurance as a formality to be sorted after closing. On a pre-1940 house, get a real bindable quote during diligence, not an agent's estimate over the phone. The difference between standard and surplus lines premium is an annual carrying cost, and it belongs in your model the same way taxes do.

What a rewire costs

Plan on a wide band, because the driver is not electrical at all.

Item	Typical range
Full rewire	$8,000 – $60,000+
200-amp panel replacement, standalone	from ~$5,800

The spread is about access, not wire. A gutted unit is cheap to rewire because the walls are already open. A finished, occupied, plaster-walled house is expensive because every circuit is a demolition and repair job wearing an electrician's hat.

Which brings us to the line that ends more rewire jobs in an argument than any other:

Most rewire quotes cover the electrical work only. Opening and patching drywall or plaster afterward can add thousands, and it is frequently not in the number you were given. On a plaster house on the near west side, the patching can approach the wiring.

So the question to ask every electrician bidding a rewire, in writing:

Does this number include closing the walls back up — and if so, to what finish? Patched, primed, or painted?

"Patched" and "painted" are three different bids. Get the word in the scope.

The permit is not optional

Electrical work in Cleveland requires a permit, and the contractor performing it must be licensed by the State of Ohio and registered with the City of Cleveland. The contractor pulls the permit. You cannot pull it for them, and the guy who offers to skip it is not saving you money.

An unpermitted rewire is the worst outcome available here. You will have spent the money and still be unable to prove the work to a carrier, a lender, or a buyer — which were the three reasons to do it. The permit and the final inspection are the asset. The copper is just what it cost to get them.

How to price it before you close

Treat knob-and-tube as a known line item, not a discovery:

• Get the attic and basement looked at properly. You are looking for original conductors, splices into modern cable, and insulation packed over the top of live runs.
• Get one real rewire bid, with the wall-repair question answered in writing.
• Get one bindable insurance quote on the property as it stands today.
• Decide the sequence. If a carrier is going to impose a six-to-twelve month rewire condition, the rewire is happening on their clock. Better to plan it into your first turn, when the unit is empty and the walls are the cheapest they will ever be to open.

A house that needs a $22,000 rewire is not unbuyable. It is a house that costs $22,000 more than the listing says. The deals that go wrong are the ones where that number showed up after closing, and the deals that go well are the ones where it was a line in the offer.

Put it on the record

Whatever you decide, the paper is the point. The rewire scope with the wall repair spelled out, the permit number, the final inspection, the updated insurance binder — those four documents are what turn "we redid the wiring" into something a buyer's underwriter will accept in four years.

Scope it in writing. Keep the permit and the inspection attached to the property. The next person to ask about this wiring will not take your word for it, and they should not have to.

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Verify before you rely on this. Underwriting appetite varies by carrier and changes constantly, cost ranges move, and nothing here is insurance advice — your agent and the specific carrier are the only authority on what your policy will do. Figures are drawn from published 2026 sources on knob-and-tube insurability and rewire pricing. Confirm permit requirements and contractor registration with the City of Cleveland Division of Building & Housing — 601 Lakeside Avenue, Room 505; 216-664-2910 — before committing to a schedule.