What's the timeline for rewiring a three-storey Victorian in Cabbagetown from knob-and-tube to modern wiring?

A full rewire of a three-storey Victorian in Cabbagetown typically takes 2 to 4 weeks of active work, but the complete project timeline from first call to ESA certificate runs 6 to 12 weeks when you account for planning, permitting, utility coordination, and inspection scheduling.

The active work duration depends heavily on how much of the home is finished versus open, how accessible the existing knob-and-tube runs are, and whether the panel and service entrance are being upgraded at the same time (they almost always are in these homes). A 2,000–2,500 sq ft Victorian with three finished floors, plaster walls, and a century of added wiring layers is one of the most complex residential rewire scenarios in the GTA.

Phase 1: Assessment and Planning (1–3 Weeks Before Work Starts)

Before a single wire is touched, a licensed electrician needs to do a thorough assessment of the existing system. In a Cabbagetown Victorian, this means mapping out the original knob-and-tube circuits, identifying every splice, junction, and amateur addition that's been layered on over the decades — and there will be many. These homes routinely have three or four generations of electrical work: original K&T from the 1910s or 1920s, a 60A fuse box added in the 1940s or 1950s, a partial circuit upgrade from the 1970s, and whatever the previous owners did themselves in the basement.

The electrician will also assess whether the service entrance — the cable running from Toronto Hydro's connection at the street to your meter base — is rated for modern loads. Most of these homes came with 60A service, and upgrading to 200A requires coordinating a disconnect and reconnect with Toronto Hydro, which adds scheduling complexity. Toronto Hydro typically needs 5–10 business days' notice for a planned disconnect, and their scheduling windows can stretch to 2–3 weeks during busy seasons (spring renovation season and post-ice-storm recovery periods are the worst).

The ESA permit application should be filed before work begins. Your electrician handles this, and permit fees for a full rewire of a home this size typically run $300–$600 depending on the number of circuits and devices being installed. Budget for 15–20 circuits in a three-storey Victorian: kitchen circuits (at least two 20A small appliance circuits plus dedicated circuits for the dishwasher and refrigerator), bathroom GFCI circuits on each floor, bedroom circuits with AFCI protection, living and dining room circuits, basement circuits, and outdoor GFCI circuits front and rear.

Phase 2: Active Rewiring (10–20 Working Days)

The rewire itself on a three-storey Victorian typically runs 2–4 weeks of active work with a crew of 2–3 electricians. The biggest variable is wall access. Plaster walls — which are standard in pre-war Cabbagetown homes — are far more difficult to fish wire through than drywall. Electricians use fish tapes, drill bits up to 6 feet long, and inspection cameras to route NMD90 cable through wall cavities, but plaster is brittle, lath boards block cable paths, and fire blocking in the walls (common in these homes) requires creative routing.

Expect some degree of wall opening. A skilled crew minimises this, but a complete rewire without any drywall or plaster repair is rarely realistic in a fully finished Victorian. Discuss upfront whether the electrician's quote includes patching, or whether you'll need a separate plasterer or drywaller — this is a common source of budget surprises. Patching historic plaster properly is a specialty trade, and in Cabbagetown where heritage character matters, it's worth hiring someone who knows the difference between a skim coat and a proper three-coat plaster repair.

The new panel — almost certainly a 200A Siemens, Square D, or Eaton unit — goes in during this phase, along with the new meter base if needed. All bedroom circuits get AFCI breakers ($30–$50 each) per the Ontario Electrical Safety Code. Bathrooms, kitchen countertop circuits, the garage if there is one, and all outdoor outlets get GFCI protection. Every outlet throughout the home must be tamper-resistant under current code. Smoke alarms need to be hardwired and interconnected on every level and outside sleeping areas — this is an Ontario Fire Code requirement, not optional.

Phase 3: Inspection and Close-Out (1–2 Weeks After Work Completes)

Once the electrician notifies the ESA that work is complete, an inspector is assigned. In Toronto, ESA inspection scheduling typically runs 3–7 business days in slower periods and up to 2 weeks during spring and fall peak seasons. The inspector will verify that all circuits are correctly sized, all required GFCI and AFCI protection is in place, the panel is properly labelled, junction boxes are accessible, and the service entrance meets current standards.

If deficiencies are noted — a missed GFCI location, an unlabelled circuit, a junction box buried in a wall — the electrician corrects them and schedules a re-inspection, adding another week to the timeline. A well-prepared crew doing thorough work passes on the first inspection the majority of the time.

Keep your ESA certificate of inspection permanently. It is one of the most valuable documents associated with your home, and buyers, insurers, and future electricians will want to see it.

Practical Cost Context

A full rewire of a three-storey Victorian in the 2,000–2,500 sq ft range, including panel upgrade to 200A and Toronto Hydro coordination, runs $20,000–$35,000 in the current GTA market. The wide range reflects wall accessibility, whether the service entrance needs full replacement, crew size, and the complexity of the existing wiring situation. Get at least three quotes from licensed electricians, and be cautious of any quote significantly below this range — a Victorian rewire done properly takes time, and low quotes often mean corners are being cut or the scope isn't fully understood.

One more thing worth knowing: many Ontario home insurers now require proof of knob-and-tube removal as a condition of coverage, or charge significant premium surcharges for homes with active K&T. Getting the ESA certificate in hand often results in meaningful insurance savings that partially offset the project cost — worth a call to your broker once the work is complete.

Need help finding a licensed electrician experienced with heritage home rewiring in the Cabbagetown area? Toronto Electrical Repair can match you with local professionals through the Toronto Construction Network — browse the directory at torontoconstructionnetwork.com/directory?trade=electrical.