Knob & tube replacement in Markham: what to expect
Markham still has houses running on knob and tube — mostly pre-1950 homes. Many insurers now decline or surcharge them, and the wiring was never designed for modern loads.
We rewire room by room while you live there: home-run circuits from the basement and attic, small planned openings elsewhere, power restored to occupied rooms at the end of each day.
When it's done you get the ESA Certificate of Acceptance and a completion letter for your insurer. Pairing the rewire with a 200 A upgrade saves a second permit and a second visit from Alectra Utilities.
Local notes: Markham
Offices and tech campuses. Tenant fit-outs, lighting controls and maintenance for office and tech buildings along Highway 7 and the 404.
Alectra Utilities. Markham is served by Alectra; we book any disconnect/reconnect for service work.
Typical costs
| Scope | Typical range |
|---|---|
| Toronto semi or row house, full rewire | $12,000 – $22,000 |
| Detached 2-storey, full rewire | $18,000 – $35,000 |
| Partial (remaining live K&T circuits only) | $3,500 – $9,000 |
| Aluminum pigtailing, whole house | $1,800 – $4,000 |
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: Knob & tube / rewiring · Electrician in Markham
Questions from Markham
How much does knob and tube replacement cost in Markham?
Typically $12,000–$22,000 for a semi or row house and $18,000–$35,000 for a detached two-storey; partial jobs cost less.
Can we stay in the house?
Usually yes — power is restored to occupied rooms each day.
Will my insurer accept the work?
You receive the ESA Certificate of Acceptance and a completion letter, which is what insurers ask for.
Knob & tube replacement nearby
Toronto · Etobicoke · East York · Whitby · Oshawa · Oakville
