Electrical Permit Process in Ontario: A Step-by-Step Guide

Whether you're renovating a storefront, building a new home, or upgrading commercial equipment " if it involves electrical work in Ontario, you need a permit. Here's everything you need to know about the process, who needs engineering drawings, and how to avoid costly delays.

Who Issues Electrical Permits in Ontario?

The Electrical Safety Authority (ESA) is the sole authority for electrical permits and inspections in Ontario. Unlike building permits (issued by municipalities), electrical permits are provincial and managed through ESA's online portal at esasafe.com.

Key facts:

• Only Licensed Electrical Contractors (LEC) can pull electrical permits
• Homeowners can pull permits for their own primary residence only
• Permits must be obtained before work begins
• Working without a permit is a violation of the Ontario Electrical Safety Code (OESC)

When Do You Need Electrical Engineering Drawings?

This is where most projects get delayed. ESA and municipal building departments require P.Eng stamped electrical drawings for:

Project Type	P.Eng Drawings Required?	Notes
Residential (single home)	Generally No	Unless complex or over 200A
Multi-unit residential	Yes	OBC Part 3 buildings require engineered drawings
Commercial tenant fit-out	Yes	Required by most municipalities
Restaurant / food service	Yes	Fire suppression interlocks require engineering
Industrial facility	Yes	600V systems, motor controls, arc flash
Service upgrade (> 200A)	Yes	Toronto Hydro requires engineered drawings
Fire alarm systems	Yes	CAN/ULC-S524 verification required

"If your project needs a building permit, it almost certainly needs engineered electrical drawings. Submitting without them is the most common reason for permit rejection in the GTA."

The Step-by-Step Process

Step 1: Engage an Electrical Engineer (P.Eng)

For commercial, industrial, and multi-residential projects, the first step is engaging a licensed Professional Engineer to prepare the electrical design. This typically includes:

• Site assessment and existing conditions review
• Load calculations per CEC Section 8
• Single-line diagrams and panel schedules
• Floor plans showing receptacle, lighting, and equipment layouts
• P.Eng stamp and signature

Step 2: Submit for Building Permit

Electrical drawings are submitted as part of the building permit application to the local municipality (City of Toronto, Mississauga, Brampton, etc.). The plans examiner reviews the electrical design for OBC compliance.

Step 3: Pull the Electrical Permit (ESA)

Once the building permit is approved, the electrical contractor pulls the ESA permit through the online portal. The contractor provides:

• ECRA/ESA licence number
• Project scope and estimated value
• Reference to the P.Eng drawings

Step 4: Construction & Rough-In Inspection

After the rough-in wiring is complete (before walls are closed), the contractor requests an ESA inspection. The inspector verifies:

• Wire sizes, circuit routing, and box fill comply with CEC
• Installation matches the engineered drawings
• Fire stopping and separation are maintained

Step 5: Final Inspection & Certificate

After all devices, fixtures, and equipment are installed, the contractor requests a final ESA inspection. Upon passing, ESA issues a Certificate of Inspection " this document is required before the local utility (Toronto Hydro, Alectra, etc.) will energize the service.

Common Causes of Permit Delays

• Missing P.Eng stamp " municipalities will reject submissions without engineering authorization
• Incomplete load calculations " fire alarm, HVAC, and emergency loads often omitted
• No utility coordination " service connection timelines not accounted for
• Architectural conflicts " electrical room too small or panel locations violating clearance codes
• Fire alarm not addressed " many projects trigger fire alarm requirements under OBC 3.2.4

Frequently Asked Questions