Which Ontario electricians handle electrical service upgrades?
Ontario homeowners upgrading from a 60A or 100A service to a modern 200A system need a contractor who holds ESA/ECRA licensing, carries WSIB compliance, and can coordinate the mandatory municipal permit and Electrical Safety Authority inspection. The five contractors below cover the province’s major service areas and represent the range of specializations available.
| Contractor | Service Area | Specializations | Key Certifications | Availability | Rating |
|---|---|---|---|---|---|
| 24/7 Electrical Service Inc | Ontario-wide | Residential, Commercial, Industrial, Smart Home | ESA licensed | 24/7 emergency | 4.7★ (172 reviews) |
| SNG Electrical Services | Cambridge, Kitchener, Waterloo | Residential, Commercial, EV Chargers (L1–L3) | Fully insured, WSIB compliant | Standard hours | 4.9★ (100 reviews) |
| Superior Power Electric | Brampton, GTA | Residential, Commercial, Panel Upgrades, Rewiring | ESA/ECRA License #7014710, WSIB | 24/7 emergency | 5★ (58 reviews) |
| [OEG | Ontario Electrical Group Inc.](http://www.oeginc.ca/) | Toronto area | Residential, Commercial, Industrial, Places of Worship | ESA Certified, Ontario Electrical League, LOC, CDAO, Skilled Trades Alliance | Standard hours |
| Southern Ontario Electric | Southern Ontario | Residential, Commercial, Industrial (smaller) | ECRA/ESA licensed, WSIB, Master Electrician | Standard hours | 5★ (8 reviews) |
24/7 Electrical Service Inc operates across Ontario with a service scope that extends beyond panel work to include safety inspections, home automation, and smart security installations. Homeowners who need a service upgrade and want to address smart home integration in the same visit will find this electrical safety inspection checklist breadth useful.
SNG Electrical Services brings over 25 years’ experience to residential and commercial upgrades in the Cambridge-Kitchener-Waterloo corridor, with particular depth in EV charger installations at all three charge levels. For homeowners in that region planning a 200A upgrade alongside Level 2 EV charging infrastructure, SNG’s combined expertise reduces the number of contractors required.
Superior Power Electric is the most specialized panel upgrade contractor on this list. The firm has completed 500+ upgrade projects and offers a $49 project assessment credited toward the final cost, which gives homeowners a written scope and quote before committing. Their ESA/ECRA License #7014710 is publicly listed, and their 24/7 emergency availability covers urgent situations such as a failed Federal Pacific or Zinsco panel.
OEG | Ontario Electrical Group Inc. holds membership in the Ontario Electrical League, the LOC, the CDAO, and the Skilled Trades Alliance, a combination of trade affiliations that reflects active engagement with provincial code updates. Their service scope covers fuse-to-breaker modernization, electrical design/build, and places of worship, making them the strongest fit for clients with non-standard building types in the Toronto area.
Southern Ontario Electric, operated by Master Electrician Cameron Brandle, is a fully insured, ECRA/ESA licensed contractor suited to homeowners who prefer working directly with a licensed master electrician on residential upgrades and safety inspections across Southern Ontario.
Pro Tip: A licensed electrician is legally required for any service upgrade in Ontario. Utility companies will only reconnect the meter for contractors holding valid permits and ESA authorization.
How does the Ontario inspection and approval process work?
An electrical service upgrade modifies the service entrance, the point where utility power enters the home, which triggers a mandatory permit and ESA inspection under the Ontario Electrical Safety Code. The permit is pulled in the licensed contractor’s name before work begins. Skipping this step voids homeowner’s insurance and creates disclosure obligations at the time of property sale.
The physical work typically takes 4–8 hours with power off across the entire home. After installation, the ESA inspector verifies panel wiring, breaker sizing, grounding, and code compliance before authorizing the utility reconnection. Scheduling the utility disconnect and the ESA inspector are the two variables that most often extend the total project timeline to 1–3 weeks. Retaining the inspection certificate is advisable, as insurers and future buyers routinely request it.
Why complex upgrades benefit from engineering consultation
When an upgrade involves load calculations for multiple high-demand circuits, EV charging infrastructure, solar integration, or a 200A service designed to support future all-electric loads, the scope exceeds what a standard contractor quote typically addresses. Futuregenconsulting, a Canadian MEP engineering firm with over 30 years of experience in Ontario power distribution and code compliance, provides engineer-stamped, permit-ready drawings and detailed load assessments that satisfy both municipal building departments and the ESA. For homeowners planning a home renovation that integrates electrical, HVAC, and fire safety systems, coordinating those disciplines through a single engineering consultant reduces the risk of costly rework and failed inspections. Contact Futuregenconsulting for a project assessment tailored to your upgrade scope.
Key Takeaways
Ontario homeowners require an ESA/ECRA-licensed, WSIB-compliant contractor and a municipal permit with mandatory ESA inspection for any electrical service upgrade.
| Point | Details |
|---|---|
| Licensing is mandatory | All Ontario service upgrades require ESA/ECRA-licensed contractors; utilities reconnect meters only for permitted work. |
| 200A is the current standard | Upgrading to 200A supports EV chargers, heat pumps, and all-electric appliances, as required by current electrical codes. |
| Inspection timeline | The full project from permit to final inspection typically runs 1–3 weeks, with 4–8 hours of power-off for the physical swap. |
| Contractor selection | Choose based on service area, ESA/ECRA credentials, and specialization; Superior Power Electric and SNG Electrical Services lead on panel upgrade depth. |
| Futuregenconsulting | For complex upgrades requiring load calculations and permit-ready engineering drawings, Futuregenconsulting provides MEP consulting services across Ontario. |