# Basement Suite Electrical Upgrade Toronto | Toronto Panel Upgrade URL: https://electricalpanelupgradetoronto.ca/basement-suite-electrical-upgrades/ ![Crew installing a 100A subpanel on a four-wire feeder for a legal basement suite](/images/misc/two-electricians-seen-from-behind-installing-a-100.webp) # Basement Suite & Second-Suite Electrical Upgrades in Toronto Last updated: September 12, 2026 Add the subpanel, submetering and separate disconnect a legal Toronto second suite requires, with ESA sign-off. - ECRA/ESA Licensed - ESA Permit Included - Utility Coordination Handled - Written Itemised Quote Get a Free On-Site Estimate [/free-estimate/ →](/free-estimate/) +1-647-577-6113 [tel:+16475776113 →](tel:+16475776113) Written itemised quote $ 800 to $3,000 CAD - ESA permit filed and inspection booked - Utility disconnect and reconnect coordinated - Same-Week Scheduling View Pricing Detail [#pricing →](#pricing) - ECRA/ESA Licensed - ESA Permit Included on Every Job - Same-Week Scheduling - WSIB Certified - Free Written Itemised Quote ## What Is a Basement Suite Electrical Upgrade? A basement suite electrical upgrade gives a second dwelling unit its own electrical identity: a dedicated subpanel fed from the main service on a four-wire feeder, isolated neutral and ground bars inside that subpanel, circuits that belong only to the suite, and a disconnect the occupant can operate without entering the main dwelling. The City of Toronto expects a documented load calculation with a secondary-suite application, which is where most projects start. A split-load calculation covers the main dwelling and the suite together, and it either confirms the existing service carries both or shows that a service upgrade has to come first. The other half of the job is separation. Suites converted without a permit routinely share neutrals between units, feed suite circuits off the main dwelling panel, or have no separate disconnect at all. All three fail inspection, and all three are safety issues rather than paperwork issues. Where the calculation calls for more capacity, see 100A to 200A service upgrades [/100a-to-200a-service-upgrades/ →](/100a-to-200a-service-upgrades/) . For the wider residential range, see residential electrical panel upgrades [/residential-electrical-panel-upgrades/ →](/residential-electrical-panel-upgrades/) . ### Subpanel Configurations - **60A suite subpanel.** Suits a smaller suite with gas heating and cooking. The most common configuration in older Toronto semis. - **100A suite subpanel.** Needed where the suite has electric heating, its own range, or laundry. - **Subpanel with submetering provision.** A socket provision installed at the same time so hydro can be billed separately to a tenant later. - **Subpanel following a service upgrade.** Where the split-load calculation exceeds the existing service, the 200A upgrade and the suite subpanel are installed as one project. ## When You Need Suite Electrical Work - **You are applying for a secondary-suite permit.** The calculation and the ESA sign-off are part of the file. - **The suite has no separate panel.** Circuits running off the main dwelling panel cannot be isolated by the occupant. - **You want to bill hydro separately.** Submetering needs the socket provision and a subpanel that only serves the suite. - **The suite was built without a permit.** Bringing it into compliance means correcting the panel and feeder arrangement and having it inspected. - **You are adding suite laundry or electric heating.** Both change the calculation materially and often trigger a service upgrade. - **A duplex or triplex conversion.** Each unit needs its own subpanel, disconnect and separation, which is the same work repeated per unit. ## What Drives the Cost Between $800 and $3,000 **Subpanel size** is the first factor, since a 100A subpanel needs a heavier feeder than a 60A one. **Feeder route and length** is second, because a finished basement ceiling or a long run from the main panel means conduit, drilling and fire-stopping. **Submetering provision** adds material and labour. **Circuit count in the suite** is the fourth, as every suite circuit terminating in the new panel is hands-on work. What sits outside this range is a service upgrade. If the split-load calculation exceeds the existing service, that is a separate project and a separate line in the quote, not a hidden add-on. ## What to Expect During the Work We normally attend twice. At rough-in, before insulation and drywall, the four-wire feeder is run from the main panel, the subpanel is mounted, and the suite circuits are pulled and terminated. The subpanel’s neutral and ground bars are isolated as required, and the separate disconnect is set where the occupant can reach it. At final, devices are terminated, the panel schedule for the suite is written and fixed inside the door, interconnected alarms are commissioned where your permit file requires them, and everything is tested. The ESA inspector attends and issues the Certificate of Inspection. That certificate is the electrical sign-off your secondary-suite file needs. We hand it over with the split-load calculation and the itemised invoice so your permit submission is complete in one go. ## How Much Does Basement Suite Cost in Toronto? Subpanel and disconnect scope. Where the main service also has to be upgraded to carry the suite, that project runs $2,500 to $8,000 CAD. Typical range $ 800 to $3,000 per subpanel (CAD) - ESA permit fee included - Final ESA inspection included - Utility coordination itemised, never hidden Get an Itemised Quote [/free-estimate/ →](/free-estimate/) ### What Moves the Price #### Overhead mast or underground lateral An underground service entrance needs trenching and civil work, so it sits higher in the range than a mast and weatherhead replacement. #### Panel brand and circuit count Siemens, Square D / Schneider Electric and Eaton load centres price differently, and a 42-circuit panel costs more than a small enclosure. #### Service entrance length and routing Conductor length from the meter base to the panel, plus any wall penetration or conduit work, changes the material and labour line. #### Scope flagged by the load calculation An OESC Section 8 result can add a subpanel, a grounding electrode conductor or a meter base that was not in the original plan. | Scope | Low | High | | --- | --- | --- | | 60A suite subpanel on a four-wire feeder | $ 800 | $ 1,800 | | 100A suite subpanel with separate disconnect | $ 1,400 | $ 2,400 | | Subpanel with submetering socket provision | $ 2,000 | $ 3,000 | ## Why Choose Us for Basement Suite? ECRA/ESA licensed, permit filed, utility coordinated, quote itemised. - ### Built for the City permit file Secondary-suite applications need documented electrical sign-off. We produce the calculation and the certificate your file requires. - ### Circuit separation done properly Suite circuits genuinely separated from the main dwelling, not a shared neutral running between units, which is a routine inspection failure. - ### Submetering provision Where you intend to bill utilities separately, the socket provision goes in at install rather than being retrofitted later. - ### Coordinated with your build We work to the contractor's rough-in and final schedule so the ESA inspection lands with the rest of the trades, not after them. ## How Does Basement Suite Work? The sequence every job follows, from the first load calculation to the utility reconnect. 1. 01 ### Split-load calculation An OESC Section 8 calculation for the main dwelling and the suite together, which is what the City expects to see on a secondary-suite application. 2. 02 ### Service capacity check Whether the existing service carries both units or a 200A upgrade has to happen first. 3. 03 ### Permit filing ESA Notification of Work filed covering the subpanel, feeder and suite circuits. 4. 04 ### Subpanel and circuit separation Four-wire feeder run, subpanel mounted with isolated neutral and ground, suite circuits separated from the main dwelling and labelled. 5. 05 ### Inspection and sign-off ESA inspection and Certificate of Inspection, which is the electrical sign-off your City permit file needs. ## How Toronto Electrical Panel Upgrade Compares | Feature | Typical provider | Toronto Electrical Panel Upgrade | | --- | --- | --- | | Load calculation | Main dwelling only | Split-load calculation covering both units | | Neutral and ground | Shared between units | Isolated neutral and ground in the subpanel | | Suite disconnect | Shared main only | Separate disconnect for the suite | | Permit documentation | Invoice | ESA certificate for the secondary-suite file | ## Need Basement Suite in Toronto or the GTA? Free on-site estimate, written itemised quote, ESA permit filed before the work starts. +1-647-577-6113 [tel:+16475776113 →](tel:+16475776113) Free On-Site Estimate [/free-estimate/ →](/free-estimate/) ## Our Basement Suite Work Documentary photos from panel jobs across Toronto and the GTA. Select any image to enlarge it. ## What Customers Say About Our Basement Suite Work Real Toronto and GTA neighbourhoods, real panel jobs. > Our secondary-suite permit needed electrical sign-off and the split-load calculation. Both were handled and the file was accepted without a second submission. Fiona M.Danforth Village > They installed a 100A subpanel with its own disconnect and separated the suite circuits properly. The inspector had nothing to flag. Ovidiu P.Junction Triangle > We plan to bill hydro separately, so they put the submetering socket in during the install rather than making it a second job. Danielle K.East York ## Basement Suite FAQs ### What electrical does a legal basement suite in Toronto need? Adequate service capacity proven by a split-load calculation, a dedicated subpanel for the suite on a four-wire feeder with isolated neutral and ground, circuit separation between the suite and the main dwelling, a separate disconnect for the suite, and ESA sign-off for the secondary-suite permit file. Submetering is optional but common where the owner intends to bill utilities separately. ### How much does basement suite electrical work cost? A 60A subpanel on a four-wire feeder runs $800 to $1,800 CAD. A 100A subpanel with a separate disconnect runs $1,400 to $2,400 CAD. Adding submetering socket provision takes it to $2,000 to $3,000 CAD. Where the main service also needs upgrading to carry both units, that is a separate project in the $2,500 to $8,000 CAD range. ### Do I need a 200A service for a basement suite? Often yes, though not always. The split-load calculation decides it. A modest suite added to a house with gas heating and cooking can sometimes sit on an existing 100A service. A suite with electric heating, its own range and laundry, on top of a main dwelling with a charger or heat pump, needs 200A. We run the numbers before quoting either way. ### Why does the subpanel need a four-wire feeder? A four-wire feeder carries two hot conductors, a neutral and a separate ground. That allows the subpanel's neutral bar to be isolated from its ground bar, which is required in a subpanel and prevents neutral current flowing on the grounding path between units. A three-wire feeder with a bonded neutral is a common older arrangement and a routine inspection failure. ### What is circuit separation and why does the City care? Each dwelling unit's circuits must originate from its own panel, so a tenant can isolate their unit and a fault in one unit does not disable the other. Shared neutrals running between units are the most common defect we find in suites converted without a permit. Separation is also a fire-separation and life-safety consideration in the City's secondary-suite requirements. ### Do I need submetering? Not legally for the suite to be approved, but it is the only clean way to bill hydro separately to a tenant. The socket provision is cheap while the subpanel is being installed and expensive to retrofit afterwards, so if separate billing is even a possibility, put the provision in now. ### Can you work around my contractor's schedule? Yes. We normally attend twice: once at rough-in for the feeder, subpanel and suite circuits before insulation and drywall, and once at final for devices, testing and the ESA inspection. Tell us the build schedule and we fit the inspection into it. ### Does the suite need its own smoke and carbon monoxide interconnection? Secondary-suite requirements include interconnected alarms across both units in most cases. That is part of the electrical scope at rough-in, and we include it where your permit file requires it. Confirm the exact requirement with your building department, since it varies with the suite configuration. ### What if the suite was built without a permit? It can usually be brought into compliance, but the panel and feeder arrangement has to be corrected and inspected, and hidden work sometimes has to be opened up for the inspector to see. We assess what is visible, tell you what we cannot see, and scope accordingly. ### Do you handle the whole suite electrical or just the panel side? We are panel specialists, so the subpanel, feeder, service capacity, disconnect and circuit separation are our scope. Where a suite needs extensive branch-circuit and device work throughout, we tell you plainly and stay in our lane on the panel and service side. ### Still have a question? Ask the crew directly. We answer load calculation, permit and utility coordination questions before you commit to anything. Send a Message [/contact/ →](/contact/) Book a Free Estimate [/free-estimate/ →](/free-estimate/) ## Related Services ### 100A to 200A Service Upgrades Upgrade an undersized 100A service to a 200A, 42-circuit panel with Toronto Hydro disconnect and reconnect coordinated on the day. View service [100A to 200A Service Upgrades →](/100a-to-200a-service-upgrades/) ### 200A Service Upgrades Upgrade to a 200A service with a 42-circuit panel and new service entrance, sized for full home electrification. View service [200A Service Upgrades →](/200a-service-upgrades/) ### Hot Tub Electrical Upgrades Add the dedicated 240V GFCI circuit or subpanel a hot tub needs, with a load check and ESA inspection. View service [Hot Tub Electrical Upgrades →](/hot-tub-electrical-upgrades/) ![](/images/hero/two-electricians-in-plain-workwear-seen-from-behin.webp) Same-Week Scheduling ## Book Your Basement Suite Estimate Add the subpanel, submetering and separate disconnect a legal Toronto second suite requires, with ESA sign-off. Free on-site assessment across Toronto and the GTA. Get a Free On-Site Estimate [/free-estimate/ →](/free-estimate/) +1-647-577-6113 [tel:+16475776113 →](tel:+16475776113) - ESA permit and final inspection included - Toronto Hydro coordination handled - No hidden fees on the written quote ## Thanks, we have your request. A licensed crew member will be in touch to book the on-site estimate. ## Request a Written Itemised Quote Four fields. We reply with a free on-site estimate date and the ESA permit and coordination fees broken out separately.