Can I replace a fuse box with a breaker panel myself?

Replacing a fuse box with a breaker panel is not legal DIY work in Ontario — this job must be done by a licensed electrical contractor, and it requires an ESA permit.

This is one of the most significant electrical upgrades a homeowner can undertake, and for good reason. A panel replacement involves working directly with your home's main service entrance, which connects to Hydro Ottawa's lines. Even with your main breaker off, the wires coming into your panel from the street remain live and carry enough current to kill instantly. This isn't a scare tactic — it's the reality of working at the service entrance level.

Beyond the immediate danger, Ontario law requires that panel replacements be performed by an ESA-licensed electrical contractor. The work also requires an ESA permit, meaning an inspector must visit and sign off before the job is considered complete. If you do this work yourself and something goes wrong — a fire, an injury, or even just a failed home inspection when you sell — your insurance company will almost certainly deny the claim. Unpermitted electrical work is a serious liability that follows the home.

What the professional process looks like is fairly straightforward when you hire the right contractor. Your electrician pulls the permit, coordinates a temporary power disconnect with Hydro Ottawa (they need to pull the meter), installs the new breaker panel, and schedules the ESA inspection. The inspector typically visits within 3–5 business days and issues a Certificate of Inspection once everything passes. The whole job is usually completed in a single day.

In the Ottawa market, expect to pay $1,500–$2,500 for a straight panel replacement at the same amperage. If you're also upgrading from 100A to 200A service (which is often worth doing at the same time), budget $2,000–$3,500. If you have a Federal Pacific or Zinsco panel — both known fire hazards — prioritize this immediately and budget $2,500–$4,000 for the replacement.

The good news is that this is a well-understood job for any licensed Ottawa electrician, and the process is smooth when done properly. For a free estimate on your panel replacement, reach out to Electrical Ottawa — we'll assess your current setup and let you know exactly what's involved for your specific home.