How much for an AFCI breaker swap in a Saint John home?

Replacing an AFCI breaker in a Saint John home typically costs $150–$350 per breaker, including parts and labour.

The breaker itself runs $40–$100 depending on the brand and amperage, and most electricians will have the job done in under an hour. However, a few factors can push the cost higher — more on that below.

What affects the price

The biggest variable is your panel brand. AFCI breakers are manufacturer-specific, so a Square D panel needs a Square D AFCI breaker, a Siemens panel needs a Siemens breaker, and so on. Some brands are significantly more expensive than others, and if your panel is an older or less common brand, sourcing compatible AFCI breakers can take longer and cost more. If your home has a Federal Pacific or Zinsco panel, this is a different conversation entirely — those panels are fire hazards and should be replaced rather than upgraded with new breakers.

If you're adding AFCI protection to a circuit that didn't previously have it (rather than swapping a failed breaker), the electrician will also need to verify the wiring is compatible. Older wiring, particularly aluminum wiring or knob and tube, can complicate AFCI installation and may require additional work before the breaker can be safely installed.

TSANB and permit requirements in New Brunswick

Under the Canadian Electrical Code as adopted by New Brunswick, AFCI protection is required for bedroom circuits (CEC Rule 26-656), and newer construction extends this to additional living areas. A straight like-for-like breaker swap on an existing AFCI circuit typically doesn't require a TSANB permit, but if you're adding AFCI protection to a circuit that didn't have it — essentially a circuit modification — a permit may be required. Your electrician will know which category your job falls into. When in doubt, contact TSANB at 1-800-999-0813 or visit tsanb.ca.

A note on DIY

Swapping a breaker means working inside your electrical panel, which exposes you to live bus bars that remain energized even with the main breaker off. This work is dangerous and in New Brunswick, homeowners are not permitted to perform most electrical work themselves. This is a job for a licensed electrician.

New Brunswick Electrical can match you with a licensed Saint John electrician for a free estimate — it's a quick job for a pro and gives you peace of mind that it's done safely and to code.