What decides the cost of a panel upgrade in a North York home

Why there's no single price

People often ask what a panel upgrade costs before we've seen the house. It's a fair question, and the honest answer is that it depends on a handful of things you can't see from the street. A bungalow on a quiet crescent and a two-storey next door can need very different work behind the meter.

That's why we don't publish prices. We look at the house first, then give you a fixed, written price after a site visit. The rest of this guide explains what we're looking at during that visit, so you know why one job is bigger than another.

Overhead or underground service

The single biggest factor is how power reaches your house. Plenty of older North York streets still have wires on poles. A line runs from the pole to a mast on your roof or wall. Many newer homes, and a lot of custom rebuilds, are fed by a cable buried in the yard instead.

An overhead service is usually the simpler upgrade. The new mast and meter base go on the outside wall, and Toronto Hydro reconnects its drop to them. An underground service can mean trenching, new conduit and heavier cable work at the point where the service enters the house. Who is responsible for each part of an underground run depends on how it was installed, so we confirm that early.

Your street can have either kind, even within one neighbourhood. A quick look at where the wires come in tells us which one you have.

Where you're starting from: 60, 100 or 200 amps

Much of North York was built after the war, and many of those houses were wired with 60 or 100 amp service. That made sense for a household with a fridge, a stove and a few lamps. It leaves very little room for central air, an induction range, a basement suite or an electric car.

Going from 60 amps to 200 amps usually means changing more parts than going from 100 to 200. The older the service, the more likely the mast, meter base, main cable and panel all need replacing together. A fuse panel is its own case: everything in it is replaced, and each circuit is landed on a new breaker.

In postwar areas like Bathurst Manor and Parkwoods, the original service is often still in place, or it was replaced once decades ago. A large custom home can sit at the other end of the range, with a service bigger than 200 amps planned from the start.

The meter base and service mast

On an overhead service, the mast is the pipe that carries the wires up to where Toronto Hydro attaches its line. The meter base is the socket the meter plugs into. The meter itself belongs to Toronto Hydro, but the mast and meter base belong to the house.

Older masts and meter bases are often sized for the original service. Some are rusted, bent by ice or a fallen branch, or mounted at a height that no longer works. When the service size goes up, these parts usually go up with it.

The meter location also matters. If the meter is on the far side of the house from the panel, the cable between them is longer. If a deck, an addition or a fence now blocks the meter, it may need to move so the utility can reach it.

Grounding and bonding

Every service needs a reliable path to earth. In many older homes, the original ground was a clamp on the metal water pipe where it enters the basement. If the water service has since been replaced with plastic pipe, that path can be gone without anyone noticing.

A panel upgrade brings the grounding up to current requirements. That can mean new ground rods or plates outside, a new grounding conductor, and bonding to the water and gas piping inside. In most houses it's a modest part of the work. It grows where access is awkward or the yard is paved right up to the wall.

Where the panel sits, and whether it moves

A panel needs clear working space in front of it and has to be reachable. In a lot of finished basements, the original panel ended up inside a closet, behind shelving or under a stairway that was built later. Some of those spots no longer meet the rules for a new installation.

If the panel can stay where it is, the existing circuits are reconnected to the new one in the same spot. If it has to move, every circuit is extended to the new location, which takes more time and material. Moving a panel can also be a chance to put it somewhere more practical, such as a utility room you're already renovating.

What we find inside the old panel

The condition of the circuits feeding the panel affects the work too. A few things we look for:

• Doubled-up breakers

  Two circuits squeezed onto one breaker usually means the panel ran out of space years ago. The new panel needs enough spaces to separate them.

• Undersized or damaged wiring

  Scorched insulation, brittle cable or wire too small for its breaker has to be dealt with before it goes into a new panel.

• Mixed wiring types

  Older ungrounded cable or aluminum branch circuits need the right connections and devices when they move to new breakers.

• Missing labels

  Circuits are traced and labelled as part of the job, which takes longer when nothing is marked.

None of these change the basic job. They change how long it takes to reconnect everything properly, which is why we open the panel cover during the site visit.

The ESA permit and Toronto Hydro

Every panel or service upgrade needs a notification of work filed with the Electrical Safety Authority (ESA). We file it, and ESA inspects the work. A Certificate of Acceptance is issued once it passes.

North York is served by Toronto Hydro, so the utility side runs through them. Toronto Hydro disconnects the power before the work and reconnects it afterwards, and it charges a fee for that disconnect and reconnect. If the service size is increasing, Toronto Hydro also decides whether its own equipment needs changing. Your written quote should be clear about which of these items it includes.

The permit, the inspection and the utility booking happen on every upgrade, large or small. What varies is how much work sits between the disconnect and the reconnect.

Planning for an EV charger or heat pump

Many North York upgrades start with a new load: a Level 2 charger, a heat pump replacing a gas furnace, or a basement apartment. These are large, steady loads, and they're the reason a 100 amp service that seemed fine suddenly isn't.

We start with a load calculation that includes what you have now and what you're planning. Sometimes the answer is that the existing service has room. Sometimes a load management device can let a charger share capacity. Often, in a postwar house, the right answer is 200 amps, sized once for everything on your list. If a charger is the reason for the upgrade, our North York EV charger page covers that side.

It's usually less work overall to upgrade once with the whole plan in mind than to upgrade, then add, then upgrade again.

What happens at the site visit

The visit is short and practical. We look at the service entrance and meter, open the panel and check the grounding. We also ask what you plan to add. Then you get a fixed, written price that lists what's included.

You can speed things up by sending photos of the panel with the door open and the meter outside. Start on our North York panel upgrade page or send a request.