Whether you’re renovating an older home in North York, adding a home office in Markham, or upgrading your electrical system in Vaughan, custom home wiring and rewiring services are critical investments that ensure safety, efficiency, and compliance with Ontario’s Electrical Safety Code.
At North York Electricians, our team of 30+ licensed electricians has completed thousands of custom wiring and rewiring projects across Toronto and the GTA over the past 20+ years. In this guide, we’ll explain what these services involve, when you need them, and what to expect in terms of cost and timelines.
What is Custom Home Wiring?
Custom home wiring refers to the design and installation of electrical systems tailored to your specific needs. Unlike standard electrical installations, custom wiring projects address unique requirements such as:
- New home construction in Richmond Hill, Thornhill, or other GTA cities
- Home additions (finished basements, second-storey additions, garage conversions)
- Kitchen and bathroom renovations requiring additional circuits
- Home automation systems and smart home integration
- Home theatre wiring with dedicated circuits for audio/visual equipment
- Workshop or studio spaces requiring 240V outlets and higher amperage
- EV charger installation with dedicated 240V circuits
A certified electrician in Toronto will assess your electrical panel capacity, calculate load requirements, and design a system that meets both your current needs and future expansion plans.
When Do You Need Rewiring Services in Toronto?
Rewiring involves replacing outdated or unsafe electrical wiring throughout your home. Many Toronto-area homes built before 1980 still have aluminum wiring, knob-and-tube wiring, or insufficient circuits for modern electrical demands.
Signs Your Toronto Home Needs Rewiring
- Frequent circuit breaker trips or blown fuses
- Flickering or dimming lights when appliances are running
- Discoloured or warm outlets and switches (fire hazard)
- Burning smell from outlets or the electrical panel
- Two-prong outlets throughout the home (no grounding)
- Aluminum wiring (common in 1960s–1970s homes)
- Knob-and-tube wiring (pre-1950s construction)
- Home insurance requirements (many insurers in Ontario require rewiring for older homes)
- Renovations or additions that expose outdated wiring
If your home shows any of these signs, contact a licensed electrician in the GTA immediately. Outdated wiring is one of the leading causes of electrical fires in Ontario.
The Rewiring Process: What to Expect
Rewiring a home is a significant project, but working with experienced electricians in Toronto makes the process straightforward and minimally disruptive.
Step 1: Electrical Assessment and Design
Our licensed electricians conduct a thorough inspection of your existing electrical system, including:
- Current panel capacity and condition
- Wire types and conditions throughout the home
- Load calculations for current and future needs
- Required upgrades to meet the Ontario Electrical Safety Code
We provide a detailed quote and timeline, including any necessary electrical panel upgrades (many older Toronto homes need to upgrade from 100 amp to 200 amp service).
Step 2: Permits and ESA Compliance
All rewiring work in Ontario requires an electrical permit from the Electrical Safety Authority (ESA). As a certified electrical contractor, North York Electricians handles all permit applications and ESA inspections on your behalf.
Step 3: Rewiring Installation
Depending on your home’s construction and whether walls are open (during renovations) or closed, our electricians will:
- Install new copper wiring (minimum 14-gauge for lighting, 12-gauge for outlets)
- Replace the electrical panel if necessary
- Install GFCI outlets in bathrooms, kitchens, and outdoor locations
- Install AFCI breakers for bedroom circuits (Ontario code requirement)
- Ground all circuits properly
- Label the electrical panel clearly
For occupied homes, we work room by room to minimize disruption. Most rewiring projects in Toronto take 3–7 days depending on home size.
Step 4: ESA Inspection and Final Approval
Once rewiring is complete, an ESA inspector verifies that all work meets Ontario Electrical Safety Code requirements. After passing inspection, you receive an ESA certificate—essential for home insurance and resale value.
How Much Does Rewiring Cost in Toronto?
Rewiring costs vary based on home size, accessibility, and the extent of work required. Here are typical ranges for Toronto and the GTA in 2026:
- 1,000 sq ft home: $8,000–$12,000
- 1,500 sq ft home: $12,000–$18,000
- 2,000 sq ft home: $16,000–$25,000
- 2,500+ sq ft home: $25,000–$35,000+
These estimates include labour, materials, permits, and ESA inspection fees. Costs increase if you need an electrical panel upgrade (add $2,500–$4,500 for a 200 amp panel upgrade in Toronto) or if walls need to be opened and repaired.
Tip: Many homeowners in Mississauga, Brampton, and Oakville combine rewiring with renovation projects to reduce overall costs, since walls are already open.
Custom Wiring for Specific Projects
Kitchen and Bathroom Renovations
Modern kitchens in Toronto require multiple dedicated circuits for:
- Refrigerator (dedicated 20A circuit)
- Microwave (dedicated 20A circuit)
- Dishwasher (dedicated 15A circuit)
- Range/oven (240V, 40–50A circuit)
- Two 20A small appliance circuits for countertop outlets
- GFCI protection for all countertop outlets
Bathrooms require GFCI outlets within 1.5 metres of water sources and dedicated circuits for heated floors or towel warmers.
Home Automation and Smart Home Wiring
Integrating smart home technology requires proper electrical planning. Our home automation electricians in Toronto install:
- Smart switches with neutral wires (many older homes lack these)
- Low-voltage wiring for smart thermostats
- Dedicated circuits for smart home hubs and networking equipment
- Wiring for motorised blinds and smart lighting systems
- Cat6 ethernet cabling for reliable smart device connectivity
EV Charger Installation Wiring
Installing a Level 2 EV charger in North York, Vaughan, or anywhere in the GTA requires a dedicated 240V, 40–60A circuit. This often necessitates an electrical panel upgrade if you have an older 100 amp service.
Our electricians design EV charger installations that accommodate future needs—many homeowners plan for multiple EVs or higher-powered chargers as technology evolves.
Why Hire a Licensed Electrician for Wiring Projects in Toronto?
Ontario law requires that all electrical work be performed by a licensed electrician and inspected by the ESA. Here’s why this matters:
Safety and Code Compliance
The Ontario Electrical Safety Code is updated regularly to reflect new safety standards. Licensed electricians stay current with these requirements, ensuring your home is safe and compliant.
Insurance and Liability
DIY electrical work or hiring unlicensed contractors can:
- Void your home insurance policy
- Create liability issues if there’s a fire or injury
- Complicate home sales (buyers’ inspectors will flag unpermitted work)
- Result in costly repairs to correct code violations
Quality and Warranty
At North York Electricians, we warranty all our wiring and rewiring work. Our 20+ years of experience means we’ve seen every type of electrical challenge in Toronto-area homes—from century homes in downtown Toronto to new builds in Richmond Hill.
Homeowner Tips for Wiring and Rewiring Projects
- Plan for future needs: Adding extra circuits now is far cheaper than running them later through finished walls.
- Combine projects: If you’re renovating, rewire at the same time while walls are open.
- Consider a panel upgrade: Many rewiring projects benefit from upgrading to 200 amp service for future capacity.
- Document everything: Keep all permits, inspection certificates, and contractor invoices for insurance and resale purposes.
- Use LED-compatible dimmers: If installing new switches, specify LED/CFL-compatible dimmers to avoid flickering.
Serving Toronto and the GTA Since 2003
North York Electricians has been providing custom home wiring and rewiring services throughout Toronto, North York, Vaughan, Markham, Brampton, Mississauga, Oakville, Richmond Hill, and Thornhill for over 20 years. Our team of 30+ certified electricians is available for:
- Free on-site estimates and electrical assessments
- Emergency electrical repairs (24/7 service available)
- Complete project management from permits to final ESA inspection
- Flexible scheduling to accommodate your renovation timeline
Ready to upgrade your home’s electrical system? Call us at +1 (647) 832-3800 for a free estimate. Our licensed electricians serve all of Toronto and the GTA with professional, code-compliant wiring services.
Frequently Asked Questions
How long does it take to rewire a house in Toronto?
Most rewiring projects take 3–7 days for an average-sized home (1,500–2,000 sq ft). Larger homes or those requiring significant panel upgrades may take 1–2 weeks. If walls are already open due to renovations, the timeline is shorter. Our electricians work efficiently to minimize disruption to your daily routine.
Can I stay in my home during rewiring?
Yes, in most cases. We work room by room and can maintain power to essential areas. However, there will be 4–8 hours without power when we replace the electrical panel. We coordinate this with you in advance. Many Toronto homeowners choose to stay with family during panel replacement day.
Do I need to upgrade my electrical panel when rewiring?
Not always, but it’s common. If your home has a 100 amp panel and you’re adding modern loads (EV charger, home automation, additional circuits), upgrading to 200 amp service is recommended. Our licensed electricians will assess your panel capacity during the initial inspection and advise whether an upgrade is necessary for safety and future needs.
Will rewiring damage my walls and ceilings?
Some access holes are necessary when rewiring through finished walls, but experienced electricians minimize damage. We often fish wires through existing cavities and make strategic access points that are easy to patch. If you’re already renovating, rewiring is far easier since walls are open. We can recommend drywall contractors in the GTA if repairs are needed.
How much does custom wiring cost for a basement renovation in Toronto?
Basement electrical wiring typically costs $3,000–$8,000 depending on size and complexity. This includes lighting circuits, outlet circuits, dedicated circuits for entertainment systems, and any 240V circuits for electric heat or future EV charger access. GFCI protection is required for basement outlets under Ontario electrical code. Contact us at +1 (647) 832-3800 for a free estimate specific to your basement project.