In West Michigan, the fastest way an accepted offer on a beautiful pre-war home turns into a full-body stress response is three words from your inspector: knob-and-tube.
The obvious concern is safety. The less obvious, closing-critical concern is insurability. In 2026, you can do everything “right” on the purchase agreement, pass the appraisal, and still get stuck at the finish line because an insurance carrier will not bind coverage on a home with active knob-and-tube (K&T) wiring.
This guide is written for buyers and sellers in Greater Grand Rapids and West Michigan, where early-to-mid 20th century housing stock is common and electrical updates can be a patchwork of eras. The goal is not to panic you. It’s to help you identify when K&T is a manageable issue versus a transaction-killer, and to give you a plan that protects your timeline and your leverage.
First, the “Michigan reality”: what code and permits actually look like
Start with the property and the proposed work, not a blanket code label. Michigan LARA explains that electrical permits are required for installing, altering, changing or adding electrical conductors or equipment, subject to applicable exceptions. Confirm the permit and inspection requirements with the enforcing agency before work begins. (Michigan LARA: electrical permits)
As checked October 14, 2026, LARA lists the 2023 NEC, effective March 12, 2024, but explicitly states that residential requirements are contained in the Michigan Residential Code. Its current residential listing is the 2015 Michigan Residential Code, effective February 8, 2016. Do not assume the 2023 NEC governs every repair in an existing house. Ask the local enforcing agency, or the state where it has jurisdiction, which code, amendments and existing-building provisions apply to this property and scope of work. (Michigan LARA: current code books)
Two practical takeaways for real estate:
- “It’s an old house” is not a permit exemption. If electrical work was done without permits, it can become a negotiation and insurability issue later.
- Local enforcement varies. Michigan has a statewide code, but permitting and inspection are handled by the local enforcing agency or the state depending on jurisdiction. (michigan.gov)
Why knob-and-tube becomes a closing problem in 2026 (even when it “works”)
1) Insurance underwriting: some carriers will not write it
Many buyers learn about K&T for the first time when their insurance agent asks one blunt question during underwriting. Progressive, for example, notes that some insurance companies may not want to offer a policy if a home has wiring types with known issues, including knob-and-tube. (progressive.com)
That matters because your lender typically requires proof of insurance to close. If coverage cannot be bound, the deal can stall or collapse even if everyone “agrees” the wiring will be updated later.
2) Insulation contact: K&T was designed to shed heat in open air
A repeat pattern in older-home electrical fire research is overheating risk when older wiring is encapsulated or covered. A CPSC report on residential electrical distribution system fires notes instances where thermal insulation around knob-and-tube wiring contributed to overheating and ignition. (cpsc.gov)
This is also why weatherization programs treat K&T as a jobsite health and safety issue, not just an “electrical nerd detail.”
3) Financing and appraisal: not always a hard “no,” but safety issues still matter
There is persistent internet folklore that “FHA won’t allow knob-and-tube.” The truth is more nuanced.
- Historical FHA context, not current approval criteria: HUD’s HOC reference guide, archived November 2, 2012, discussed accepting knob-and-tube in good condition with at least 60-amp service. That archived statement does not establish current FHA eligibility or a universal lender rule. Ask the lender to identify the current program requirements, any additional lender conditions, and any property-specific repairs or professional evaluations required for this loan. An appraisal or electrician’s letter alone does not guarantee financing or insurance. (HUD archived electrical guidance)
- VA loans focus on Minimum Property Requirements tied to safety and habitability. VA has modernized its appraisal process and updated Chapter 12 as of mid-2026. (news.va.gov)
Translation: K&T might not automatically fail an appraisal, but visible hazards and missing repairs can still trigger conditions, and insurance can still stop the closing even if the loan program does not.
What West Michigan buyers should do (before you write the offer, not after inspection)
Step 1: Assume you need an insurance plan on older homes
If the home looks like 1900 to 1940 era construction, treat “insurance bindability” as a due diligence item, just like well and septic or floodplain research.
- Call your insurance agent before you submit the offer.
- Ask what they need to bind coverage if K&T is present: electrician letter, photos, proof it’s de-energized, proof of rewire, permit sign-off, or simply “we won’t insure it.”
- Build a realistic timeline. Electrical work and inspections are not instant, especially when electricians are booking weeks out.
Step 2: Spot the “most negotiable” version of knob-and-tube
In practice, K&T shows up in a few ways:
- Abandoned (de-energized) K&T still physically present. Often the easiest to live with from a transaction standpoint, if documented.
- Partially active K&T. Common: a few lighting circuits, attic runs, or a second-floor branch circuit.
- Active K&T that has been buried under attic insulation. This is where you see more “hard stop” reactions from inspectors, weatherization guidance, and underwriters.
If you can only remember one sentence: active + concealed + insulated is the version most likely to wreck your timeline.
Step 3: Make your inspection period do real work
A standard home inspection can identify the presence of K&T, but it typically does not map every circuit, confirm all splices, or validate load calculations. When K&T is in play, consider adding a licensed electrician evaluation during your due diligence window.
Ask for answers to these closing-relevant questions:
- What is still energized? Not “what is visible,” but what is actually carrying power.
- Where is it located? Attic, walls, basement, lighting circuits.
- Is any of it in contact with insulation? If yes, what is required to make it compliant and insurable?
- Is there evidence of DIY splices or mixed-era wiring problems?
- What is the service size and panel condition? (K&T conversations often come with fuse panels, undersized service, or messy subpanels. Each can become its own underwriting issue.)
- What permits will be pulled, and who is the enforcing agency? Michigan requires permits for most electrical alterations and additions. (michigan.gov)
The insulation problem: why weatherization guidance matters in real estate
Even if you are not doing a weatherization program, the guidance is useful because it’s written for crews who work in attics and wall cavities all day, where K&T surprises happen.
A web version of Michigan’s weatherization field guidance for attic work includes a direct instruction to maintain a minimum 3-inch clearance between attic insulation and knob-and-tube wiring, and it points readers to “Decommissioning Knob-and-Tube Wiring” in the Michigan Weatherization Field Guide. (wxfieldguide.com)
The same Michigan field guidance also tells crews not to insulate cavities containing knob-and-tube wiring. (wxfieldguide.com)
In a transaction, this shows up as a practical dilemma:
- Buyers want better insulation and lower operating costs.
- But insulation upgrades can force the K&T issue into the open, because you cannot reasonably promise clearance without knowing what is active and where it runs.
If you are negotiating repairs, treat “electrical safety and insurability” as the priority and “energy upgrade” as the follow-up project, unless your electrician can sequence both cleanly under permit.
Negotiation options that actually work (and the ones that often don’t)
Option A: Seller completes a permitted rewire before closing
This is the cleanest solution for underwriting and for a buyer’s peace of mind, but it is not always practical. It requires time, access, scheduling, and usually some drywall repair afterward.
If you go this route, the details matter:
- Define scope: full rewire versus targeted circuits.
- Require permits and final inspection sign-off from the enforcing agency, not just “a receipt.” Michigan requires permits for electrical alterations and additions. (michigan.gov)
- Confirm whether the work needs to be completed before appraisal re-inspection (if applicable) or simply before closing.
Option B: Buyer receives a credit or price reduction
Credits can be effective when the buyer has cash reserves and a willing insurer who will bind coverage temporarily. The trap is assuming you can close first and solve it later, only to learn the insurer will not issue the policy at all until K&T is removed or de-energized.
If you are a buyer considering a credit, pair it with an insurance plan in writing: quote first, negotiation second.
Option C: “We’ll just handle it after closing” with no documentation
This is the version that breaks deals. Not because the buyer is irresponsible, but because lenders and insurers need hard requirements met on a real timeline.
Seller strategy: how to list an older West Michigan home with K&T without inviting chaos
If you are selling an older home in Grand Rapids, East Grand Rapids, or any West Michigan neighborhood with early 1900s housing stock, assume buyers will ask about electrical permits and insurance sooner than they used to.
A pre-list plan that tends to reduce drama:
- Get an electrician evaluation before photos. Not because you must rewire, but because you want a clear, defensible description of what is active versus abandoned.
- Decide what “good enough to market” means. If active K&T is limited to a few circuits, you may choose to fix it pre-list to protect your buyer pool.
- Document permits for past electrical work when available. Michigan requires permits for most electrical alterations and additions. (michigan.gov)
- Be careful with insulation claims. If an attic was insulated at some point, be ready for buyers to ask whether K&T was present at that time and how clearance was maintained.
None of this guarantees an insurer’s decision. It simply makes your listing easier to underwrite, easier to negotiate, and harder for a deal to derail late.
A quick “walkthrough checklist” for spotting knob-and-tube in the wild
This is not a substitute for an electrician, but it helps buyers and sellers ask better questions early:
- Basement/crawl: look for ceramic knobs attached to framing and single conductors run separately.
- Attic: look for porcelain tubes through joists and older two-wire runs that disappear under insulation.
- Panel clues: older fuse panels or a mix of new breakers plus very old branch wiring often signals partial updates.
- Outlet clues: two-prong outlets do not prove K&T, but they do suggest ungrounded circuits and warrant deeper investigation.
What I’d do if you sent me an address (the calm, closing-first approach)
Every house is different, but the decision tree is consistent:
- Confirm what’s active (inspection plus electrician when warranted).
- Confirm you can insure it on your timeline, not on a hopeful timeline.
- Choose the negotiation tool that matches the underwriting reality: repair, credit, price, or walk-away.
- Write the agreement so it can be enforced: scope, permits, proof, deadlines.
If you’re buying or selling an older home anywhere in Greater Grand Rapids or along the lakeshore markets where vintage housing is common, I’m happy to help you think through the insurability and negotiation strategy before you commit to a path that only works in theory.