Is knob-and-tube wiring a dealbreaker in an older Saint John home?

Knob-and-tube wiring isn't automatically a dealbreaker, but it demands serious attention before you buy or renovate. Many older Saint John homes — particularly Victorian and Edwardian-era properties in the South End, Uptown, and the North End — still have knob-and-tube in some form, and how you handle it will significantly affect your budget and insurability.

Here's the core issue: knob-and-tube (K&T) was designed for a world with far fewer electrical loads. The system has no ground wire, relies on open-air cooling to dissipate heat, and becomes genuinely dangerous when insulation is packed around it (which is exactly what you'd want to do in a cold Saint John home). The wiring itself may be 80-100+ years old at this point. Deteriorated insulation on the conductors, improper splices done over the decades, and overloaded circuits are the real hazards — not necessarily the original installation.

The insurance problem is often the bigger immediate headache. Many New Brunswick insurers either refuse to cover homes with active knob-and-tube, charge significantly higher premiums, or require a licensed electrical inspection before issuing a policy. Get clarity on this before you firm up any purchase offer — call your insurer with the address and ask directly. This can make or break financing too.

From a cost standpoint, a full electrical panel upgrade and rewire of a Saint John Victorian or Edwardian home typically runs $12,000–$25,000+, depending on the size of the house, how much of the original wiring is being replaced, and whether the panel is being upgraded at the same time. Partial rewires (replacing K&T in specific areas like the kitchen, bathrooms, or attic) cost less but may not satisfy insurers. All electrical work in New Brunswick must be done by a licensed electrical contractor — licences are issued by NB Dept. of Justice and Public Safety — Technical Inspection Services (TIS) at 1-888-659-3222. A wiring permit from NB Power (1-800-615-0522) is required before work begins, and TIS does the final inspection.

What to do right now if you're buying: Make your offer conditional on a thorough home inspection by an inspector experienced with older Saint John homes, and specifically request an electrical assessment. If K&T is found, get a licensed electrician to do a separate evaluation — a home inspector can flag it, but an electrician can tell you how much is active, how much has already been replaced, and what the realistic remediation scope looks like.

If you already own the home, the practical approach is to prioritize: replace K&T in the attic first (insulation contact is the biggest fire risk), then kitchens and bathrooms, then work through the rest over time. A phased rewire over a few years is manageable for most budgets.

The bottom line: K&T is a cost and a complication, not necessarily a reason to walk away from an otherwise solid Saint John home. The bones of those older houses — brick construction, old-growth lumber framing, solid plaster walls — are often exceptional. Just go in with eyes open and a realistic electrical budget.

Browse licensed electricians in our directory at New Brunswick Construction Network to get quotes from contractors familiar with older Saint John properties.