How much does an ESA electrical permit cost for wiring a garage in Ottawa?

An Electrical Safety Authority (ESA) permit for garage electrical work in Ottawa typically costs between $100 and $400, depending on the scope of the work. The ESA uses a fee schedule based on the type and quantity of electrical installations, so a simple garage with basic lighting and a few outlets will be at the lower end, while a fully wired workshop with a sub-panel, EV charger circuit, and 240-volt outlets will be at the higher end.

For a basic garage electrical installation — a dedicated circuit from your house panel, overhead lighting, a few duplex outlets, and a garage door opener connection — the ESA permit fee runs approximately $100 to $150. A more comprehensive installation that includes a sub-panel in the garage, multiple dedicated circuits, 240-volt receptacles for welders or compressors, and exterior lighting typically costs $200 to $300 for the permit. If you are adding an electric vehicle charger (Level 2, 240-volt), that adds to the permit scope and may push the fee toward $250 to $400 depending on the amperage and whether a panel upgrade is involved.

The ESA permit is separate from and in addition to the City of Ottawa building permit. Even if your garage project does not require a building permit (for example, you are adding electrical to an existing garage without structural changes), the electrical work still requires an ESA permit. All electrical work in Ontario must be performed by a licensed electrician who is registered with the ESA, and the electrician typically handles the permit application as part of their scope of work.

The process works like this: your electrician submits the permit application to the ESA, describing the planned work. The ESA issues the permit, and the electrician proceeds with the rough-in wiring. Before the walls are closed up with insulation and drywall, the ESA sends an inspector to verify that the wiring meets the Ontario Electrical Safety Code. The inspector checks wire gauge, circuit protection, box fill calculations, grounding and bonding, and the overall quality of the installation. After the rough-in passes inspection, the walls can be closed, and a final inspection occurs once all devices (outlets, switches, fixtures) are installed and energized.

Common items the ESA inspector checks in a garage installation include: proper GFCI (ground fault circuit interrupter) protection on all outlets within 1.5 metres of a sink or at grade level, adequate circuit capacity for the planned loads, proper wire routing and protection (especially where wiring is exposed below 1.5 metres in a garage, it must be in conduit or armoured cable), and correct bonding of metal garage door tracks to the grounding system.

One cost that homeowners sometimes overlook is the electrical service capacity. If your home's existing electrical panel is already near capacity — common in older Ottawa homes with 100-amp or 125-amp service — adding a garage with significant electrical loads may require a panel upgrade or service upgrade. A panel upgrade from 100-amp to 200-amp service costs $2,500 to $4,500 in Ottawa, including the ESA permit, Hydro Ottawa coordination, and the electrician's labour. This is a separate project from the garage wiring itself and needs to be identified early in the planning process.

Electricians connected through Ottawa Garages can assess your existing panel capacity and provide a complete quote for garage wiring including all ESA permit fees.

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