Which building code applies to plumbing in Ontario?

The 2024 Ontario Building Code, in effect since January 1, 2025, with all permit applications using it from April 1, 2025. Part 7 covers plumbing. The province's pages and your municipal building department are the authorities.

Do plumbers need TSSA registration?

TSSA regulates fuels work. Only TSSA-registered fuels contractors, using certified gas technicians, may do fuels-related work, which matters for plumbers who install gas water heaters. Check with TSSA for your situation.

Is lead service replacement worth marketing?

In cities with older housing and active programs, yes. Toronto estimated about 13,664 city-side lead services left at the end of 2025. Market it factually, linking the city's program pages.

Plumbing News and Marketing in Ontario

Ontario is the country's largest plumbing market by almost any measure. Statistics Canada reported $5.1 billion in Ontario building permits in August 2026, more than any other province, with housing in the Greater Toronto Area ranging from pre-war houses to new towers. The province's 2024 Building Code has governed new permits since 2025, and municipal programs, such as Toronto's lead service replacement, create steady private-side work.

The Ontario plumbing market and its buyers

The direct answer: crowded metro markets, strong regional cities and a vast north.

Toronto. Older homes with lead services in some neighbourhoods, a huge condo stock and intense search competition.
Peel and York. Mississauga, Brampton, Markham and Vaughan mix newer subdivisions with large condo and townhouse developments, and many property managers.
Ottawa. A separate market from the GTA, with its own competitors and suburbs.
Hamilton and London. Regional centres with large older housing stocks.
Northern Ontario. Longer, colder winters, long distances and fewer competitors.

August permits were up 9.4% on the month in Ontario, per our permits story.

Climate and seasonality

Southern Ontario's winters are cold but moderated near the Great Lakes; the north has longer, colder heating seasons. For plumbers:

Winter: frozen pipes in cold snaps, water heater failures and heating-related plumbing.
Spring and summer storms: basement flooding, sump pumps and backwater valves, especially in older neighbourhoods.
Fall: outdoor shut-offs and winter preparation.

Natural gas heated 58% of Ontario homes in 2023, electricity 18% and propane 4%, according to Statistics Canada. Propane matters in rural areas for water heaters and heating.

Regulators and bodies to know

Building code: the province's 2024 Ontario Building Code page; our summary is in the Ontario code story. Permits and inspections run through municipal building departments.
TSSA regulates fuels, boilers and pressure vessels. A plumber connecting a gas water heater needs to know that TSSA allows fuels work only through registered fuels contractors whose technicians hold gas certificates.
Skilled Trades Ontario for apprenticeship and certification. Ontario certifications across all trades dipped 0.9% in 2024, per our apprentice story.
WSIB for workers' compensation.
Consumer Protection Ontario for consumer rules.

We link and summarise only; ask the authority about your obligations.

Programs and municipal work, as of October 2026

Lead service replacement. Toronto's 2025 lead report estimated about 13,664 public-side lead services left and described a priority program in which the City replaces its side when owners commit to replacing theirs. Our Toronto lead story has the details. Other Ontario municipalities run their own programs; check each one.
Save on Energy's Home Renovation Savings Program was open with no closure notice on official pages as of 2026-10-22. It is mainly about energy upgrades; mention it only where your work qualifies.
As of 2026-10-22, Ontario had not signed on to the federal Canada Greener Homes Affordability Program.

What to publish first in Ontario

For an Ontario plumbing company, three pages usually come first:

Private-side lead service replacement for each city you serve that has an active program, built from that city's own pages and dated.
Basement flooding and backwater valves, with links to municipal subsidy programs where they exist, checked before publishing.
A permit FAQ that reflects the 2024 Building Code and your municipality's process, without promising inspection outcomes.

In the GTA, each of these may need a separate version per municipality, because programs and processes differ between Toronto, Mississauga, Brampton and York Region.

How we approach plumbing marketing in Ontario

Neighbourhood-level pages in Toronto and the GTA, built around housing age and real local issues such as lead services and basement flooding.
Property-manager and condo pages for multi-unit service work in Peel, York and downtown Toronto.
Careful ad budgets. GTA plumbing clicks are expensive, so campaigns are split by job type and area, with tight negatives; see the ads service.
Code and program content with dates and links, through industry content.

See the coverage hub, or contact us about your Ontario market.

Plumbing industry news and marketing in Ontario