Thinking about becoming a plumber in Ontario but unsure how much time it’ll take? You’re not alone. Many aspiring tradespeople ask: “How long is a plumbing apprenticeship in Ontario?” The good news? It’s a clear, structured path—but it does require commitment. In this guide, we’ll walk you through the exact timeline, key milestones, and insider tips to help you succeed—whether you’re just starting out or already enrolled.
How Long Does a Plumbing Apprenticeship Take in Ontario?
In Ontario, a plumbing apprenticeship typically takes about 4 to 5 years to complete. This includes a combination of on-the-job training and in-school learning.
Here’s the official breakdown from Skilled Trades Ontario (STO), the provincial regulatory body:
On-the-job training: 7,200–8,280 hours (approx. 4–5 years full-time)
You must complete all hours and pass all in-school sessions plus the Certificate of Qualification exam to become a licensed journeyperson plumber in Ontario.
💡 Pro Tip: You can start working under a licensed plumber as soon as you register your apprenticeship—even before your first in-school block!
What’s the Exact Breakdown of Hours and Training?
Ontario’s plumbing apprenticeship follows a competency-based model, meaning progress depends on logged hours and demonstrated skills—not just time. Below is the standard structure:
Component
Hours Required
Details
On-the-Job Training
7,200–8,280 hours
Paid work under a certified journeyperson
Basic Level (Level 1)
8 weeks
After ~1,800 hours
Intermediate Level (Level 2)
8 weeks
After ~3,600 hours
Advanced Level (Level 3)
8 weeks
After ~5,400 hours
Final Exam
1 exam
After completing all hours and levels
Most apprentices work full-time (35–40 hours/week), so the timeline averages 48–60 months. Part-time work extends this.
According to a 2023 report by the Ontario Ministry of Labour, 72% of plumbing apprentices complete their training within 5 years.
How to Start a Plumbing Apprenticeship in Ontario: Step-by-Step
Ready to begin? Here’s your roadmap:
Meet Basic Eligibility
Be at least 16 years old
Have a valid Social Insurance Number (SIN)
Hold an Ontario Secondary School Diploma (OSSD) or equivalent (Grade 12 with math and English preferred)
Find an Employer
Secure a job with a licensed plumbing contractor who agrees to train you
Use job boards like Job Bank Canada or the Ontario Youth Apprenticeship Program (OYAP) if you’re still in school
Submit your training agreement signed by you and your employer
Begin On-the-Job Training
Start logging your hours immediately
Track progress via the My Workplace Safety and Insurance Board (WSIB) portal
Attend In-School Training (When Called)
STO will notify you when you’re eligible for each level
Classes are offered at public colleges like George Brown, Humber, or Fanshawe
Write the Certification Exam
After completing all requirements, apply to write the Plumbing Certificate of Qualification (306A)
Pass with 70% or higher to become a certified journeyperson
⚠️ Note: Unlike some provinces, Ontario does not require pre-apprenticeship training—but taking a pre-apprenticeship course can improve your hiring chances.
What Are the Costs Involved?
One of the biggest advantages of a plumbing apprenticeship in Ontario? It’s largely paid training.
Tuition: In-school blocks cost $300–$600 per level (often reimbursed by employers or grants)
Books & Tools: ~$500–$1,000 upfront
Exam Fee: ~$150 for the 306A certification
Many apprentices receive full wages during on-the-job training—starting at $18–$22/hour, rising to $35+/hour by final year.
📊 Stat: According to Job Bank Canada (2024), the median hourly wage for journeyperson plumbers in Ontario is $38.50, with top earners making over $50/hour.
Pros and Cons of a Plumbing Apprenticeship in Ontario
Pros
Cons
✅ Earn while you learn (no student debt)
❌ Physically demanding work
✅ High job demand (plumbers are in short supply)
❌ Irregular hours (emergencies, weekends)
✅ Clear path to self-employment
❌ Must pass provincial exam to work independently
✅ Strong union & non-union opportunities
❌ Finding an employer can be competitive in some regions
“Plumbing is recession-proof. People will always need clean water and working drains,” says Maria Chen, Master Plumber and Trainer at UA Local 46 Toronto.
Is Plumbing Apprenticeship Worth It in Ontario?
Absolutely—if you enjoy hands-on problem-solving and want job security.
Ontario faces a critical shortage of skilled tradespeople, with over 10,000 plumbing job openings projected by 2028 (Source: Ontario Construction Secretariat). Plus, as a certified plumber, you can:
Work for a company
Start your own business
Specialize in areas like gas fitting, medical gas, or green plumbing
Become a trainer or inspector
And thanks to Red Seal endorsement (which Ontario plumbers qualify for), your license is recognized across Canada.
🌐 Learn more about the Red Seal Program on Wikipedia.
FAQ: Plumbing Apprenticeship in Ontario
Q1: Can I complete a plumbing apprenticeship faster than 4 years? A: Yes—if you work full-time year-round and attend in-school training on schedule, you can finish in as little as 48 months. However, delays in finding an employer or scheduling school can extend it.
Q2: Do I need a high school diploma to start? A: Officially, no—but most employers prefer candidates with Grade 12 English and Math. If you don’t have a diploma, you can still apply through STO’s “mature student” pathway.
Q3: Can I transfer plumbing hours from another province? A: Yes! Ontario recognizes apprenticeship hours from other Canadian provinces. Submit your documentation to STO for evaluation.
Q4: What’s the difference between a plumber and a plumbing apprentice? A: An apprentice works under supervision and is training toward certification. A licensed plumber (306A) can work independently, pull permits, and supervise others.
Q5: Are there grants or financial help for apprentices? A: Yes! Programs like the Apprenticeship Incentive Grant (AIG) and Ontario Skilled Trades Grant offer up to $2,000–$4,000 in non-repayable funding.
Q6: Can I become a plumber without an apprenticeship? A: No. In Ontario, you must complete a registered apprenticeship and pass the 306A exam to legally work as a plumber. Skipping this path means you can’t get licensed.
Conclusion
So, how long is a plumbing apprenticeship in Ontario? Typically 4 to 5 years—but it’s a smart investment in a stable, well-paid, and in-demand career. With Ontario’s aging workforce and growing infrastructure needs, now is an excellent time to enter the trade.
If you’ve found this guide helpful, share it with someone considering the skilled trades! And don’t forget to follow Skilled Trades Ontario on social media for updates on training, grants, and exam dates.
🔧 Your future in plumbing starts with one pipe—and one decision. Make it count.
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