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.

Electrical Problems in Markham Homes Solved By Professional Electricians

In many Markham homes, electrical issues don’t start as emergencies. A flickering light, a warm outlet, or a breaker that trips occasionally often signals a deeper problem within aging wiring or overloaded circuits. Left unresolved, these small faults can escalate into safety risks or costly failures.

The best next step is to diagnose the issue properly before it spreads.

At Langstaff & Sloan, our team of local electrical contractors performs structured, code-compliant inspections that identify root causes (not just surface symptoms) so you can fix the problem once and avoid repeat issues.

Our Residential Electrical Services in Markham That Fix the Root Cause

Many of the homes we care for in Markham were built decades ago, and their electrical systems weren’t designed for today’s demands. We handle a wide range of residential electrical repair, from flickering lights to full rewires, with the same methodical approach every time.

Whole-Home Electrical Repair and Troubleshooting

We handle house electrical repair for overloaded circuits, dead outlets, flickering lighting, and intermittent faults, restoring safe and consistent power throughout your home.

Electrical Panel Repairs and Upgrades

We repair electrical panel systems and perform full panel upgrades to support modern electrical loads, improving safety and reducing breaker failures.

Wiring Replacement and System Corrections

We replace aluminum wiring, knob-and-tube, and cloth or rubber wiring, bringing older homes up to current code standards while eliminating hidden risks.

Electrical Installation and System Upgrades

We complete electrical service repair projects, including EV chargers, generators, solar integration, and full electrical system design and build for renovations.

Service Calls and Emergency Repairs

Our team responds to urgent household electrical repairs, diagnosing faults quickly and completing most repairs in a single visit with stocked service vehicles.

Our Commercial Electrical Repairs and Contracting Services

Langstaff & Sloan also supports commercial properties across Markham with structured, code-compliant electrical services.

Lighting and Retrofit Upgrades

We handle new and retrofit lighting systems designed to improve efficiency and performance in commercial environments.

Troubleshooting and Service Calls

Our team provides fast-response electrician repair services to resolve faults and minimize downtime.

Electrical Construction and Design-Build

We manage full electrical installation and repair for new construction, leasehold improvements, and system upgrades.

Power Systems and Infrastructure

We install and upgrade panels, sub-metering systems, EV chargers, generators, and solar systems to support business operations.

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

    
 
 
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   Top Tier Tails 
 
 
 
 Trustindex verifies that the original source of the review is Google. Wonderful company and staff.   Always helpful and knowledgeable.  I highly recommend langstaff!
  
 
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   D S 
 
 
 
 Trustindex verifies that the original source of the review is Google. From initial contact with Rob to on-site service from Phil the experience with Langstaff and Sloan has been exemplary. Highly recommend
  
 
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   Alec Rae 
 
 
 
 Trustindex verifies that the original source of the review is Google. First time using this company. The owner Rob and his employees were very fast, professional and helpful. I had scheduled morning of and they had an electrician out to my location within an hour. I then needed additional work done the next day and they were able to help immediately and were very easy to work with. I will definitely continue to use them in the future. 10/10 service and very friendly. They took the time to explain things to someone who knows nothing about electrical work, something most electricians will not do.
  
 
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   Kristoph Thellimi 
 
 
 
 Trustindex verifies that the original source of the review is Google. After finding a major issue with our electrical panel, Langstaff & Sloan diagnosed the problem for us and seamlessly guided us through an electrical upgrade and repair with minimal disruption in the dead of winter.

Rob, Phil, Arsh, and the crew were professional, responsive, and  have a commitment to high-quality work at a reasonable price. They'll work within your budget and won't ever be opportunistic and drive you towards the more expensive result, just the one that makes the most sense for you and your home. Very happy with the service, and can't recommend them enough for any residential work.
  
 
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   Thibisan B 
 
 
 
 Trustindex verifies that the original source of the review is Google. L&S should be your go-to electrical contractor for both residential and commercial work.

They upgraded my electrical panel, installed a Tesla EV charger, set up wired security cameras, and more — all at a great price!

They have a great team and quality work !
  
 
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   jste91 
 
 
 
 Trustindex verifies that the original source of the review is Google. The crew was shockingly good, and living through a week long knob & tube upgrade with a newborn baby at home was a breeze, not the dreaded nightmare we had anticipated. The guys were very communicative and conscientious, minimally disruptive, efficient, and of course the quality of the work was top notch.
Thank you to Rob, Colin, and the rest of the guys.
  
 
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   Brad 
 
 
 
 Trustindex verifies that the original source of the review is Google. They did an excellent job on my home for Knob and Removal.  On time and within budget. Price was also very reasonable.
  
 
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   Taylor Hough 
 
 
 
 Trustindex verifies that the original source of the review is Google. The team came out and did a massive job for us. Extremely thorough and honest. Another Toronto peer quoted us $15k for the same work (which came to $4500). We will use them again.
  
 
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   Tarek Taleb 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can’t thank Rob enough for his incredible support in diagnosing and solving an electrical issue in my kitchen. I had been struggling with a frustrating problem—every time I used my microwave, it would trip the breaker and shut off power to my fridge as well. I was genuinely concerned, especially living in a condo where access to wiring can be tricky.

Rob quickly and confidently identified the root cause of the issue: both the fridge and microwave were on the same circuit, overloading the breaker. Not only did he walk me through the technical side in a way that made perfect sense, but he also guided me step-by-step on how to test the outlets, identify the GFCI and breaker panel, and safely work around the issue until a long-term fix could be arranged.

What really stood out was his patience, professionalism, and ability to explain complex electrical details in a simple, reassuring way. Thanks to Rob, I now fully understand how to avoid overloading circuits, and I feel much safer in my home.

If you’re looking for someone who’s knowledgeable, reliable, and genuinely cares about solving your problem the right way — Rob is the one. Highly recommended!
  
 
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   CiNdY LiN 
 
 
 
 Trustindex verifies that the original source of the review is Google. Detailed and quality service. I required electrician due to cable length too short and not sufficient to replace led podlights. The lines are inspected in detail and reorganized to gain more clearance to cable length. Work is done neatly, tidy and professionally.

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

What types of electrical repairs do you handle in Markham?

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.

Do you handle the ESA permits and inspections?

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.

How much do home electrical repair services cost in Markham?

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.

When should I repair or replace my electrical panel?

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.

Do I need a licensed electrician for house electrical repair?

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.

Can electrical issues cause higher energy bills or appliance damage?

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.