How much do contractors charge for garage electrical upgrade in Ottawa?

Garage electrical upgrades in Ottawa typically range from $800 to $4,500+, depending on the scope of work, panel capacity, and distance from your main electrical panel.

Most homeowners are looking at one of two scenarios: adding a few outlets and better lighting to an existing circuit, or running a dedicated subpanel to the garage for heavier loads like EV chargers, compressors, or workshop equipment. The scope makes a huge difference in cost, so it's worth being clear about what you actually need before getting quotes.

For a basic upgrade — adding 2-4 outlets, a couple of LED shop lights, and a dedicated circuit — you're typically looking at $800 to $1,500. This assumes your main panel has capacity and the garage is attached or close to the house. If you're adding a dedicated 240V circuit for a welder, EV charger, or air compressor, budget $1,200 to $2,500 depending on wire run length and panel access.

The bigger job is installing a garage subpanel, which gives you flexibility for multiple heavy loads and future-proofing. A 60-amp or 100-amp subpanel run to a detached garage in Ottawa typically costs $2,500 to $4,500+. Detached garages add cost because of the underground conduit run — Ottawa's frost line is 4 feet deep, so trenching needs to account for that, and you may need to cross a driveway or landscaping.

Ottawa-specific considerations matter here. If you're in an older home (pre-1980s) in areas like Alta Vista, Carlington, or Centretown, your main panel may already be at capacity or may need an upgrade itself — that can add $2,000 to $4,000 to the project. EV charger installations are increasingly common in newer suburban builds in Kanata, Barrhaven, and Orleans, and some Ottawa Hydro incentive programs may apply depending on your charger type.

On the permit and inspection side, all electrical work in Ontario requires an ESA (Electrical Safety Authority) permit — no exceptions. Only a Licensed Electrical Contractor (LEC) can pull that permit on your behalf. The ESA inspection fee is typically included in your contractor's quote, but confirm this upfront. You can verify a contractor's license at esasafe.com/contractor-locator before hiring.

This is not a DIY project to skip permits on. Unpermitted electrical work can void your home insurance, create liability issues if you sell, and — most importantly — is a genuine fire and safety risk in a garage environment where flammable materials are often stored.

Your next steps:

• Get 2-3 quotes from Licensed Electrical Contractors — make sure each quote specifies amperage, number of circuits, and whether the ESA permit and inspection are included
• Check your main panel capacity before quotes (a contractor can assess this on-site)
• Browse verified electricians in the Ottawa Construction Network directory to find ESA-verified professionals in your area