146 reviews
Electrical Panel Upgrades
75/100 Home Generator Index Score
- Says it is licensed
- Says it is insured
- Says it is bonded
Says on its own site it does backup power work
Mapped to MarkhamHours not stated
Best Electrical Panel Upgrade Contractors in Markham (2026)
Last updated:ByStandby Power Desk
5 electrical panel upgrade contractors serving Markham, compiled August 2026.
243 reviews on the 4 with 3+ · median 5★ of those · typical $1,500–$4,000 per project (CAD) (RenoHouse) · availability year-round
Which electrical panel upgrade contractors rank highest in Markham?
All 5 electrical panel upgrade contractors Home Generator Index tracks in Markham, in rank order. Placement cannot be bought. How the score is built.
- 58 reviews
Electrical Panel Upgrades
70/100 Home Generator Index Score
- Says it is licensed
- Says it is an ECRA/ESA licensed electrical contractor
Says on its own site it does backup power work
Mapped to MarkhamHours not stated - Mapped to MarkhamOpen 7 days
- 7 reviews
Electrical Panel Upgrades
58/100 Home Generator Index Score
- Says it has been going since 1991
- Says it is licensed
Mapped to MarkhamOpen Mon to Fri - 2 reviews
Electrical Panel Upgrades
55/100 Home Generator Index Score
- Says it is licensed
- Says it is insured
Says on its own site it does backup power work
Mapped to MarkhamOpen Mon to Sat 24 hours
5 electrical panel upgrade contractors cover Markham in the August 2026 Home Generator Index dataset. The 4 with three or more reviews average 4.8★ on Google across 243 of those reviews. 75% of the rated companies here sit at 4.8★ or better, so the gap between positions is narrow.
What a Markham electrical panel upgrades job is quoted at
Quotes follow the job, not the postcode.
Frequently asked questions
Are there enough electrical panel upgrade contractors in Markham to compare?
- Home Generator Index's August 2026 dataset lists 5 electrical panel upgrade contractors working in Markham, averaging 4.8★ on Google, the middle company sitting on 58 reviews. Call three of them and put the written quotes side by side. On backup power the differences hide in the line items: sizing method, who runs the gas, and whether the permit and inspection are included.
Questions to ask your contractor
- Can you show me the load calculation behind this recommendation? Panel upgrade cost breakdown
- Does the quote include the meter, the mast and the service conductors?
- Who books the utility disconnect and reconnect?
- How many jobs like mine have you finished in this area in the last year?
- Is the Electrical Safety Authority inspection fee in the price?
- Can the panel work and the generator tie in run under one inspection?
- What do you charge for a site visit if I do not go ahead?