Panel upgrades in Markham: what to expect
Most homes we open up in Markham are heritage homes in Unionville and Markham Village alongside 1990s–2010s subdivisions. Older houses here are often still on 60 or 100 A services — fine when they were built, tight once you add central air, an EV and an induction range.
Service upgrades in Markham need a disconnect and reconnect from Alectra Utilities. We file the ESA notification, book the utility, and on the day swap the panel, re-terminate every circuit and test before Alectra Utilities restores power — usually the same afternoon.
Adding a basement apartment is one of the most common reasons Markham homeowners call us about their panel: a second household means a second set of loads, and often a dedicated sub-panel.
Local notes: Markham
Heritage districts. Older homes along Main Street Unionville and Markham Village can still have original wiring. We rewire carefully, with minimal openings in original plaster.
Basement suites. Second units are popular across Markham. A legal suite needs the electrical side designed with the fire separation and alarm rules in mind.
Typical costs
| Scope | Typical range |
|---|---|
| 100 A → 200 A, panel and meter base in same location | $3,500 – $5,500 |
| Includes new mast / service entrance or panel relocation | $5,500 – $8,000 |
| Fuse panel replacement (keeping 100 A) | $2,000 – $3,200 |
| Sub-panel for a basement, garage or addition | $1,200 – $2,500 |
Where we work in Markham
We cover all of Markham, including Unionville, Markham Village, Cornell, Cathedraltown, Berczy Village, Milliken, Thornhill, Box Grove. Every job starts the same way: a site visit, a written fixed quote, then the work — permit included.
More on this service: Panel & service upgrades · Electrician in Markham
Questions from Markham
How long does a panel upgrade take in Markham?
Usually one day on site with four to eight hours without power. Booking the Alectra Utilities disconnect typically takes one to three weeks.
Who handles the Alectra Utilities side?
We do. We book the disconnect and reconnect with Alectra Utilities and file the ESA permit — you don't need to call either.
Do all Markham homes need 200 A?
No. If you're only adding an EV charger, load management can often avoid an upgrade. We'll calculate your actual load first.
Panel upgrades nearby
Vaughan · Thornhill · Richmond Hill · Aurora · Newmarket · Toronto · Etobicoke · North York