Trades & Contractors · 6 min read · Last updated
The Drain Layer licence is Toronto's person-level drainage credential. It covers the individual who does drain laying, installs weeping tile or septic tanks, rebuilds or repairs drains, clears tree roots and other obstructions, and works on private drain connections. If that is you — not just your company — this is the licence to hold.
The City of Toronto lists this under its “Trade” category: “A Drain Layer is a person who does drain laying, weeping tile installing, septic tank installing, drain reconstruction or repair or removing tree roots or other obstructions from drains, or private drain connections.”
Who needs this licence?
The City defines a Drain Layer as a person doing any of a long list of drainage activities: drain laying, weeping tile installing, septic tank installing, drain reconstruction or repair, removing tree roots or other obstructions from drains, and private drain connections. Notice how operational the list is — this licence follows the shovel and the auger, not the letterhead.
That is the difference from the Drain Contractor licence, which belongs to the business repairing, constructing, installing or cleaning drainage works. In many firms the two coexist: the company carries the contractor licence, the tradespeople in the excavation carry drain layer licences. And whichever licences are in place, the physical work of connecting or rebuilding a drain can still require its own permit — the credential never substitutes for it.
What documents do you need?
Because the licence attaches to a person, the package is personal:
- Two pieces of government-issued identification, one with a photo
- Evidence of qualifications or experience in drain work, per the City's checklist
- A police reference check where the City requests one
- Business registration details if you also operate as a business
Zoning and premises requirements
The licence attaches to you, not to an address. There is nothing to zone unless you run the business from home, in which case the office use has to fit the City's home-occupation rules. Every excavation you work on has its own approvals — those travel with the job, never with your licence.
Inspections and approvals
There are no premises inspections tied to the licence — the credential is you. Municipal Licensing & Standards investigates complaints and unlicensed work, while the drain work itself is inspected wherever a permit applies: a private drain connection or a rebuilt run is checked under its permit before backfill. Being the licensed person on site when the inspector arrives is much of the point.
How much does it cost?
There is an application fee and an annual renewal fee, both set in the City's licensing fee schedule. You confirm the current amounts during the application, and both are paid to the City directly.
How to apply
Applications go to Municipal Licensing & Standards under Chapter 545 of the Municipal Code. Use the City's online Business Licence & Permit portal — available since January 2026 — or apply in person. File identification, qualifications evidence and any requested police check together.
If you also run the business that contracts the work, plan the drain layer and drain contractor applications as a pair; Permits2Go's workspace keeps both packages straight.
Renewals and staying compliant
The licence renews annually, and continuity matters more for a personal credential than most: gaps in your licence history are awkward to explain to the contractor employing you. Renew ahead of expiry and keep your contact information current with the City.
Quick quiz: test what you learned
Three questions, all answered in this guide. Click an answer to check it.
1. Which of these activities falls under Toronto's Drain Layer licence?
Root and obstruction removal is named in the City's definition, alongside drain laying, weeping tile and septic tank installation.
2. Who exactly does the Drain Layer licence attach to?
It is a person-level credential — the business side of drainage work is covered by the Drain Contractor licence.
3. A licensed drain layer is hired to redo a private drain connection. What else may the job need?
The licence qualifies the person; permits authorize the specific work, and drain connections are classic permit territory.
Skip the paperwork
Tell Permits2Go about your business and it assembles the licence application for you — document checklists, e-signatures and a guided workspace for Toronto, with more cities on the way.
This guide is general information, not legal or professional advice. Licensing requirements, by-laws and fees change and vary by municipality — always confirm the current rules with the City before you apply.