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Make sure the fee belongs to your project.
For a house with one or two dwelling units, Toronto uses a stand-alone drain permit. The City states that no plans are required for those houses, although the application form and related program documents can still apply.
Toronto lists backwater-valve installation as permit-required work.
The dedicated City guide says no plans are required for one- and two-unit houses.
Program and inspection requirements can affect when the installation may be covered or enclosed.
Need the broader Toronto fee schedule?
Use the BuildRules fee guide and calculator for supported categories, then confirm the final classification with Toronto Building.
Open permit fee calculatorOfficial sources behind this page
Toronto lists backwater-valve installation as permit-required work.
The dedicated City guide says no plans are required for one- and two-unit houses.
Program and inspection requirements can affect when the installation may be covered or enclosed.
Need the full project answer?
The main guide keeps the permit trigger, zoning questions, documents, fees, timing and next steps together.
Open the backwater valve guide