Plumbing Contractors in Ontario

Hiring a Plumbing in Ontario

Frequently Asked Questions — Plumbing Contractors

How many plumbing contractors are in the directory?

Our directory lists 100 verified plumbing contractors across 38 cities in Ontario.

What is the average rating for plumbing contractors?

The average Google rating for plumbing contractors is 4.8 stars based on 40,803 combined reviews.

Do plumbing contractors need a licence in Ontario?

Ontario College of Trades — Licensed Plumber (306A). Plumbing is a compulsory trade in Ontario — must be licensed.

How much does plumbing work cost in Ontario?

Costs vary by project and location. Water Heater: $1,200-$3,500 (installed). Bathroom Rough In: $3,000-$8,000 (complete). Drain Cleaning: $150-$500 (per service). Get at least 3 quotes.

How do I find a good plumbing contractor?

Check Google reviews, verify WSIB coverage at wsib.ca, confirm they pull required permits, get 3 written quotes, and never pay more than 10-15% deposit upfront.

How much does a plumber charge per hour in Ontario?

Licensed plumbers in Ontario typically charge $110-$145/hour, with rates of $200-$350/hour for emergency calls (evenings, weekends, holidays). Always get a flat-rate quote for specific jobs rather than agreeing to hourly billing.

Do I need a permit for plumbing work in Ontario?

Most plumbing work that alters your water supply or drainage system requires a permit from your local building department. This includes new bathrooms, kitchen relocations, and water heater installations. Your licensed plumber should handle the permit.

Should I repair or replace my water heater?

Tank water heaters last 10-15 years. If yours is over 10 and needs a major repair ($500+), replacement is usually more cost-effective. A new tank water heater costs $1,200-$1,800 installed; tankless units run $2,500-$4,000 but last 20+ years.

What is the average plumbing cost in Ontario in 2026?

Average plumbing costs in Ontario in 2026: service call $150-$250, drain clearing $150-$400, faucet installation $200-$450, toilet installation $250-$500, water heater installation $1,200-$4,000, bathroom rough-in $3,000-$6,000. Prices vary by region — GTA is 15-20% higher than Niagara.

How much does it cost to unclog a drain in Ontario?

Drain unclogging in Ontario costs $150-$400 for standard snaking. Camera inspection runs $200-$400 extra. Hydro-jetting (for severe blockages) costs $350-$600. Main sewer line clogs can run $300-$800. Emergency or after-hours calls add $150-$250.

How much does toilet installation cost in Ontario?

Toilet installation in Ontario costs $250-$500 for a standard replacement (labour + materials). Upgrading to a low-flow toilet may qualify for municipal rebates ($50-$100). If the flange or subfloor needs repair, add $200-$500. Rough-in for a new toilet location costs $1,500-$3,000.

How do I find a licensed plumber in Ontario?

Licensed plumbers in Ontario hold a Certificate of Qualification (C of Q) from the Ontario College of Trades. Ask for their licence number and verify at ontario.ca/skilled-trades. Also check for liability insurance ($2M+), WSIB coverage, and positive Google reviews.

What plumbing work requires a licensed plumber in Ontario?

Ontario law requires a licensed plumber for: water supply line installation/repair, drainage system modifications, water heater installation, gas line connections, backflow prevention, and any work requiring a building permit. Homeowners can do basic repairs (faucet washers, toilet flappers).

How much does a kitchen or bathroom renovation plumbing cost?

Plumbing for a kitchen renovation in Ontario costs $2,000-$5,000 (new sink, dishwasher, gas line). A bathroom renovation runs $3,000-$8,000 depending on scope. Moving fixtures to new locations adds significantly — expect $1,000-$2,000 per fixture relocation.

What causes frozen pipes in Ontario and how do I prevent them?

Pipes freeze when exposed to prolonged temperatures below -7°C, common in Ontario winters. Prevent by insulating exterior pipes, keeping cabinet doors open on cold nights, maintaining minimum 13°C heat, and ensuring proper air sealing. If pipes freeze, call a plumber — never use a torch.

How much does sump pump installation cost in Ontario?

Sump pump installation in Ontario costs $800-$2,500 for a standard pit and pump. Battery backup systems add $500-$1,000 (essential for Ontario storm power outages). Annual maintenance ($100-$200) extends pump life. Replace every 7-10 years.

Does my Ontario home need a backflow prevention device?

Many Ontario municipalities (including Niagara, Hamilton, and Toronto) require backflow prevention devices to protect the water supply. Installation costs $300-$1,500 depending on type. Annual testing ($100-$200) is mandatory. Check your municipal bylaws.

How much does a tankless water heater cost in Ontario?

A tankless water heater installed in Ontario costs $2,500-$5,000. They use 30-50% less energy than tank heaters, last 20+ years, and never run out of hot water. Larger homes may need multiple units. Gas models require proper venting — ensure your plumber sizes it correctly.

What is the best time to schedule plumbing work in Ontario?

Fall (September-November) is the best time for non-emergency plumbing in Ontario — contractors are less busy after summer renovation season, and you can prepare pipes for winter. Avoid January-February (emergency season) and May-June (peak renovation demand) for the best rates.

Should I get a plumbing inspection before buying a home in Ontario?

Absolutely. A plumbing inspection ($200-$500) can reveal hidden issues like polybutylene pipes (common in 1980s Ontario homes, prone to failure), galvanized steel pipes (corrosion), foundation leaks, and sewer line damage. This can save $5,000-$30,000 in surprise repairs.

How much does emergency plumbing cost in Ontario?

Emergency plumbing in Ontario costs $250-$600+ for the call, plus parts. After-hours rates (evenings, weekends, holidays) are typically 1.5-2x standard rates. Common emergencies: burst pipe repair ($300-$800), sewage backup ($400-$1,200), water heater failure ($300-$600 for repair).

What is the Ontario Building Code requirement for plumbing?

The Ontario Building Code (OBC) Part 7 covers plumbing requirements including pipe sizing, venting, drainage, fixture counts, and water conservation. All plumbing work requiring a permit must comply with OBC and be inspected. Your licensed plumber should handle code compliance.

Can I install a water softener myself in Ontario?

While not strictly requiring a licence for basic installation, connecting a water softener to your plumbing system is best done by a licensed plumber to ensure code compliance, proper bypass valve installation, and warranty coverage. Professional installation costs $200-$500 plus the unit ($800-$2,500).