Electricians in Markham, ON
For over three decades, Langstaff & Sloan has been Markham’s choice for local electricians who deliver precise, code-compliant home electrical repair for occupied family dwellings, resolving decades of DIY fixes, and restoring full function to overloaded circuits.Â
Electrical Problems in Markham Homes Solved By Professional Electricians
Our Residential Electrical Services in Markham That Fix the Root Cause
Whole-Home Electrical Repair and Troubleshooting
Electrical Panel Repairs and Upgrades
Wiring Replacement and System Corrections
Electrical Installation and System Upgrades
Service Calls and Emergency Repairs
Our Commercial Electrical Repairs and Contracting Services
Lighting and Retrofit Upgrades
Troubleshooting and Service Calls
Electrical Construction and Design-Build
Power Systems and Infrastructure
Panel Upgrades and Renovation Wiring
A growing household or a major renovation quickly pushes an older panel past its limits. When you work with a home renovation electrician who understands what your Markham home actually needs, you avoid costly rework later.
Our electrical installation and repair for renovations covers new circuits, pot lights, dedicated appliance runs, and EV charger readiness. If you’re researching local licensed electricians for a whole-home transformation, our portfolio stretches from century-home gut renovations to modern additions.
Why Choose Us As Your Electrical Contractors in Markham
Since 1991, Langstaff & Sloan has built our reputation on code-compliant precision, safe execution, and dependable results across Markham and the GTA.
ESA Authorized Contractor
One of the original ESA-authorized contractors for Toronto Hydro, delivering electrical repairs that meet strict code standards and pass inspection the first time.
Proven Experience Since 1991
Over three decades providing local electricians services across Markham and the GTA, with hands-on experience in both older homes and modern electrical systems.
Licensed & Fully Insured
Our team of certified professionals delivers residential electrical repair with full insurance coverage, safety-first practices, and compliance with Ontario Electrical Code.
Knob & Tube Specialists
We follow a structured process for replacing outdated wiring, making us a trusted choice for complex home electrical repair projects in older homes.
Transparent Communication
You get clear diagnostics, upfront pricing, and scheduled service for every electrical service repair, so there are no surprises from start to finish.
A+ Local Reputation
Backed by an A+ BBB rating and strong local reviews, we’re known as reliable local electrical contractors who show up on time and get the job done right.
A Team That’s Grown with Markham
Hiring a local electrician in your area means hiring someone who already understands your home’s wiring era. Our crews have opened walls in 1950s bungalows near Unionville, traced circuits through 1980s split-levels in Milliken, and wired the newer infill townhomes in Cornell and Box Grove. We know what each generation of construction tends to hide.
Our electrician repair service hasn’t changed its standards in 30 years: show up on time, diagnose the actual fault, quote honestly, and finish clean. Because we run a stocked fleet as an electric repair company built for the GTA, we complete most electrician repairs in a single visit—no waiting on parts.
When the job is larger—a full electrical service and repair with a panel swap or a rewire—you get one dedicated project lead who owns the schedule from permit to final ESA sign-off.
Our Electrical Repair Process in Markham
Langstaff & Sloan follows a clear, step-by-step approach to delivering safe, code-compliant electrical repairs across Markham without guesswork or delays.
Licensed Inspection & Diagnosis
Every home electrical repair begins with a detailed on-site inspection by a licensed electrician to identify code violations, safety risks, and root causes.
Clear Scope, Pricing & Recommendations
You receive a written scope outlining required electrical service repair, upgrade recommendations, and transparent pricing so you can make an informed decision before any work begins.
ESA Notification & Permit Handling
For applicable work, we file ESA notifications and manage permits to ensure all residential electrical repair complies with Ontario Electrical Code and inspection requirements.
Code-Compliant Repairs & Installations
All repairs are completed by licensed professionals using approved materials and methods, whether addressing faults, upgrading panels, or replacing outdated wiring systems.
Inspection, Testing & Certification
Once work is complete, ESA inspection is coordinated when required, and all systems are tested to confirm safety, performance, and full compliance.
Testimonials
excellent
Google rating score: 4.7 of 5,based on 43+ reviews
Partnering With A Licensed Electrician In Markham
Your electrical system affects how safely and efficiently your home operates every day. When issues are diagnosed correctly and repaired properly, you avoid recurring problems, reduce risk, and improve long-term reliability.
Langstaff & Sloan delivers structured, code-compliant home electrical repair designed to solve problems at the source. From small fixes to full system upgrades, every project is completed with precision, safety, and accountability.
Call 647-492-8193 or book your appointment online to schedule your local electrical service. Whether you need an electrician for outlet repairs, a panel upgrade, or a whole-home rewire, we arrive on time, work cleanly, and leave your home safer than we found it.
Frequently Asked Questions
Langstaff & Sloan handles a full range of electrical repairs in Markham, including outlet and switch issues, breaker trips, panel upgrades, rewiring, and troubleshooting faults. Our licensed team focuses on identifying root causes, not just symptoms, ensuring your system is safe, reliable, and compliant with Ontario Electrical Code requirements for long-term performance.
Yes, we manage ESA notifications and inspections for all applicable electrical service repair projects in Markham. As a licensed electrical contractor, we ensure all work meets Ontario Electrical Code standards and coordinate inspections directly with ESA. Once approved, you receive a Certificate of Acceptance confirming your system is safe and compliant.
The cost of home electrical repair in Markham depends on the issue, system condition, and scope of work. Minor repairs may cost a few hundred dollars, while panel upgrades or rewiring projects can range into the thousands. A proper diagnosis is required to provide accurate pricing based on safety requirements and code compliance.
You should repair or replace your panel when you notice frequent breaker trips, limited capacity, or outdated equipment. A failing panel often cannot safely support modern electrical loads, making upgrades necessary. A licensed electrician will assess whether a repair or full replacement is required for safe and compliant operation.
Yes, Ontario law requires a licensed electrical contractor for most house electrical repair work to ensure safety and compliance. Licensed electricians are authorized to file ESA notifications, complete work to code, and arrange inspections. Hiring unlicensed workers can lead to safety risks, failed inspections, and insurance complications.
Yes, faulty wiring, overloaded circuits, and outdated panels can increase energy consumption and damage appliances. Inefficient electrical systems often struggle to distribute power correctly, leading to wasted energy and inconsistent performance. Addressing these issues with proper repairs improves efficiency, protects equipment, and reduces long-term operating costs.