Do I need a separate electrical permit from ESA for my addition in Ottawa?

Yes. If your addition includes new wiring, circuits or electrical equipment, that work needs an Electrical Safety Authority (ESA) notification or permit, and it is separate from the building permit you get from the City of Ottawa. The City's own FAQ notes that a building permit is not required for work that is exclusively electrical, because electrical work goes through ESA instead. A building permit covers the structure; it does not cover the wiring.

In practice, the electrical side of an addition is done by an electrical contractor licensed by ESA, who files the notification and arranges ESA inspection. Electricians are a compulsory trade in Ontario, so anyone doing the work on site must be authorized. You can check an individual's authorization on the Skilled Trades Ontario Public Register, and you can ask the electrical contractor for their ESA licence details. Homeowner rules for doing your own electrical work are set by ESA, so ask ESA directly if you are considering it.

The timing of ESA inspections typically lines up with construction: wiring is inspected before walls are closed in, and the finished installation is checked at the end. Your general contractor should schedule the electrical rough-in so the inspection happens before insulation and drywall. Ask ESA or your electrician what inspections your specific scope needs and what the current fees are.

Electrical cost depends heavily on scope. A bedroom with outlets and lights is very different from a kitchen with dedicated appliance circuits or a space heated with electric baseboards or a heat pump. Ask for an itemized electrical line in each quote rather than relying on a rate per hour.

Load is the other big question. An addition adds lighting, outlets and possibly heating or cooling, and your existing service may or may not have room for it. An electrician can do a load calculation on your panel and tell you whether a service upgrade is needed, which is better to know before construction starts than halfway through. Heating equipment in an addition should be sized from a heat-loss calculation, not a rule of thumb.

If the addition includes gas appliances such as a furnace, water heater or fireplace, that work is done by a TSSA-certified gas technician. For contractors who coordinate all of these trades, browse addition contractors in the Ottawa Construction Network directory and compare itemized quotes.

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