How much does it cost to replace a 100 amp panel with a 200 amp panel in a Scarborough semi-detached home?

A 100A to 200A panel upgrade in a Scarborough semi-detached home typically costs $2,000-$5,000, with most projects falling in the $2,500-$3,500 range. The final cost depends primarily on whether your existing service entrance cable and meter base can support 200A or need replacement as well.

Panel-Only Upgrade ($2,000-$3,000)
If your home already has 200A-rated service entrance cable running from Toronto Hydro's transformer to your meter base, and the meter base itself is rated for 200A, your electrician can simply replace the panel box and main breaker. This scenario is common in Scarborough homes built in the 1970s-80s where the original installation included 200A service entrance infrastructure but only a 100A panel. The work involves disconnecting power at the meter (coordinated with Toronto Hydro), removing the old panel, installing the new 200A panel box, transferring all existing circuits to appropriately-sized breakers, and reconnecting the main feed.

Full Service Upgrade ($3,500-$5,000)
Many Scarborough semi-detached homes from the 1950s-70s have 100A service entrance cable that cannot safely carry 200A. In these cases, Toronto Hydro must install new service entrance cable from the street transformer to your meter base, your electrician installs a new 200A-rated meter base and panel, and the entire service entrance gets upgraded. This work requires Toronto Hydro coordination for disconnection and reconnection, which can add 2-4 weeks to the project timeline and $500-$1,000 to the cost.

GTA-Specific Considerations for Semi-Detached Homes
Scarborough's semi-detached housing stock presents unique challenges that can affect pricing. Many of these homes share a service entrance location with the adjacent unit, requiring careful coordination with neighbors and sometimes shared costs for utility upgrades. The narrow side yards typical in Scarborough semis can make meter base access challenging, potentially requiring additional conduit work or service entrance relocation. Winter scheduling is particularly important — Toronto Hydro prioritizes emergency service calls during ice storms, so non-emergency service upgrades can face delays from December through March.

What's Included in the Cost
The quoted range includes the 200A panel box ($300-$800 depending on brand and number of circuits), all necessary breakers including AFCI breakers for bedroom circuits as required by current Ontario Electrical Safety Code ($200-$600 for a typical home), ESA permit and inspection ($150-$300), labour for panel installation and circuit transfer (6-10 hours), and basic circuit labeling. If your home has knob-and-tube wiring or aluminum branch circuits, expect additional costs for bringing those circuits up to current code standards.

Additional Costs to Consider
GFCI outlets may need installation in bathrooms, kitchens, and outdoor locations if not already present ($200-$350 per outlet). Smoke detector circuits might require upgrading to hardwired interconnected units ($300-$800 for a typical semi). If you're planning an EV charger installation, discuss the wiring route during the panel upgrade to potentially save on future installation costs.

ESA Permit and Timeline
Your licensed electrician will pull the ESA permit before starting work. The upgrade typically takes one full day, with power restored the same day in most cases. ESA inspection occurs within 3-7 business days of completion. Keep the ESA certificate permanently with your home records — it's required documentation for insurance and resale.

Why 200A Makes Sense in Scarborough
Most Scarborough semis are 1,200-1,800 square feet with electric heating, central air conditioning, and modern appliance loads. A 200A panel provides capacity for EV charger installation (40-50A), hot tub addition (40-60A), basement suite electrical (60-100A sub-panel), and future electrical expansion without overloading. Given Toronto's ice storm history, many homeowners also add generator transfer switches, which require adequate panel capacity.

Need help finding a licensed electrician for your panel upgrade? Toronto Electrical Repair can match you with local professionals who specialize in service upgrades in Scarborough's semi-detached housing stock.