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Electrical Panel Upgrades in Toronto & the GTA

Electrical Panel Upgrades in Toronto & the GTA

100A to 200A panel and service upgrades, installed in as little as one day by licensed Toronto electricians.

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Your electrical panel is the heart of your home’s electrical system. In many Toronto homes it is also the hardest-working part – and in older homes, it may be working beyond what it was designed to handle. If your breakers trip regularly, your lights flicker, or you are planning an EV charger, a hot tub, or a major renovation, a panel upgrade may be the most important electrical project you take on this year. This guide covers the warning signs, 100A vs 200A service, what drives cost in Toronto, and exactly what happens on install day.

7 Signs You Need a Panel Upgrade

If any of these sound familiar, have a licensed electrician assess your panel before a minor issue becomes a major one.

1. Breakers that trip constantly.
An occasional trip is normal. Breakers that trip again and again are telling you the circuit – or the panel – is overloaded.
2. Flickering or dimming lights.
Lights that dim when the microwave, dryer, or air conditioner kicks in point to a panel struggling to keep up with demand.
3. A Federal Pioneer panel.
Federal Pioneer (Stab-Lok) panels have a documented history of breakers failing to trip when they should. Many insurance companies flag them, and replacement is usually recommended.
4. A fuse box instead of breakers.
Fuses are outdated and inconvenient, and they are a sign your service is decades behind modern demand. They can also complicate home insurance and resale.
5. A burning smell or scorch marks.
Any smell of burning plastic near the panel, or discoloration on breakers, means shut things down and call a licensed electrician right away.
6. A panel over 25 years old.
Panels do not last forever. Corrosion, worn breakers, and outdated designs make older panels less safe and less capable.
7. Plans for an EV charger, hot tub, or renovation.
Big new loads need real capacity. If your panel is full or you are still on 100A service, these projects usually require an upgrade first.

100 Amp vs 200 Amp: Which Do You Need?

Amps measure how much electricity your home can draw at once. Most older Toronto homes were built with 60A or 100A service – plenty in the 1970s, but tight for a modern household running central air, an electric dryer and range, a home office, and now an EV.

A 200A service is the modern standard for detached and semi-detached homes. It roughly doubles your available capacity and leaves headroom for the next twenty years of electrification: EV chargers, heat pumps, induction cooking, and basement suites.

The definitive answer comes from a load calculation. A licensed electrician totals up your home’s electrical demand according to the Ontario Electrical Safety Code and determines the service size you actually need. If you are adding any major load – or your panel is already full of tandem breakers – 200A is almost always the right call. A licensed electrical contractor will not guess at this: the load calculation comes first, and the recommendation follows from it.

Siemens electrical panels that are used for panel and service upgrades.

Panel Upgrade vs Service Upgrade

The two terms get mixed up, but they describe different jobs:

Panel replacement (panel upgrade)

Swapping your old panel for a new breaker panel at the same amperage – for example, replacing a fuse box with a modern 100A breaker panel. You get safer, more reliable breakers and more circuit spaces, but your home’s total capacity stays the same.

Service upgrade

Increasing your home’s amperage – typically from 100A to 200A. This is the bigger job: new service conductors, a new meter base, a new panel, coordination with Toronto Hydro, an ESA permit, and an ESA inspection.

A load calculation settles which one you need. If your demand fits your current service, a panel replacement may be enough. If you need more power, only a service upgrade will do.

What a Panel Upgrade Costs in Toronto

Every home is different, so be cautious of one-size-fits-all prices. These are the factors that determine the cost of a panel upgrade in Toronto:

Panel size and amperage
a 200A service upgrade involves more material and labour than a like-for-like panel swap.
Labour and job complexity
accessibility of the panel, the number of circuits, and how the existing wiring is run.
Permits and inspections
ESA permit and inspection fees are part of every compliant job.
Condition of existing wiring
older or damaged wiring, ungrounded circuits, or code issues found during the swap can add work.
Panel relocation
moving the panel to a new location means new conduit, longer wire runs, and more labour.

The only way to get an exact number is an assessment. We inspect your panel, run a load calculation, and give you a firm written quote.

The Install-Day Process

Most residential panel upgrades are completed in one day. Here is the typical sequence:

  1. Assessment and load calculation – we confirm the right panel and service size for your home.
  2. ESA permit – we pull the required permit before any work begins.
  3. Power shutdown – we coordinate a safe shutdown; for service upgrades this includes the utility.
Generac GP2500i portable inverter generator used to provide temporary backup power during a panel upgrade

WHAT WE DO DIFFERENTLY

Stay connected while your panel is replaced.

For an additional charge, we can set up temporary backup power for selected 15- or 20-amp circuits during the shutdown, so your modem, computers and office lighting keep running while the rest of your home is safely powered down.

  1. Old panel out – the existing panel is disconnected and removed.
  2. New panel in – the new panel is installed, circuits are reconnected, labeled, and tested.
  3. ESA inspection and power restored – the installation is inspected, then your power is back on.

You will be without power for part of the day. We tell you in advance exactly when the outage starts and ends so you can plan around it.

EV Chargers, Hot Tubs & Renovations

These are the projects that most often trigger a call for more capacity:

EV charger installation
a Level 2 charger typically needs a dedicated 40-60A circuit.
Hot tubs and saunas
another 40-60A of continuous load.
Basement apartments and laneway suites
essentially a second household on your service.
Kitchen renovations
induction ranges, double wall ovens, and additional circuits.
Heat pumps and electric heating
switching from gas to electric heat is a major new load.
Home additions
more square footage means more lighting, heating, and receptacle load.

If your panel is already full or you are on 100A service, plan the panel upgrade before – not after – the renovation.

ESA Permits & Safety

In Ontario, panel and service upgrades legally require an ESA (Electrical Safety Authority) permit, and the finished work must pass an ESA inspection. This is not paperwork for its own sake – it is the independent check that your installation is safe.

Never hire anyone to do this work without a permit. Unpermitted electrical work can void your home insurance, cause problems when you sell, and most importantly, put your household at risk. Our upgrades are performed by licensed electricians, permitted with the ESA, and inspected on completion.

Ready for More Power?

Get a firm, written quote for your panel or service upgrade. We will assess your panel, calculate your load, and recommend the right size – no guesswork. That is how an electrical contractor should work: assess first, quote in writing, then do the job once and do it right. We are among the best in the business.

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FAQ

How much does an electrical panel upgrade cost in Toronto?
It depends on the panel size, labour, ESA permit and inspection fees, the condition of your existing wiring, and whether the panel needs to be relocated. Because every home is different, the honest answer is: get an assessment. We will inspect your panel, run a load calculation, and give you a firm written quote.
How long does a panel upgrade take?
Most residential panel upgrades are completed in one day. The assessment and ESA permit happen beforehand; on install day the old panel comes out, the new panel goes in, and the ESA inspection wraps it up.
Do I need 100A or 200A service?
It depends on your home’s calculated load. 200A is the modern standard for detached and semi-detached homes, especially if you are adding an EV charger, a hot tub, electric heat, or a secondary suite. A licensed electrician’s load calculation gives you the definitive answer.
Is my Federal Pioneer panel dangerous?
Federal Pioneer (Stab-Lok) panels are widely considered a safety concern because their breakers have a documented history of failing to trip during overloads. Many insurers ask about them specifically. If you have one, have it assessed promptly – replacement is usually the recommendation.
Do I need a permit for a panel upgrade?
Yes. In Ontario, panel and service upgrades require an ESA permit and a passed ESA inspection. We handle the permit and coordinate the inspection as part of the job.
Will my power be off all day?
Your power will be off for part of install day while the panel is swapped. Most upgrades finish the same day, and we will tell you in advance exactly when to expect the outage.

FREE GUIDE

The Complete Guide to Panel Upgrades in Ontario

Your home’s power, explained — 100A vs 200A sizing.

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