Toronto vs Durham: How the Renovation Permit Process Works

If you are renovating in the GTA, the building-permit process follows the same provincial rulebook — the Ontario Building Code — whether your home is in Toronto or in Durham Region. What differs is which government you apply to, because the two are structured differently. Understanding that saves a common source of confusion: in Durham, the Region is not where your renovation permit comes from.

Same code, different government

The Ontario Building Code is provincial, so the technical standards a renovation must meet are the same across the GTA. But building permits are issued and inspected at the municipal level, and Toronto and Durham are organized differently:

Renovating in Toronto

• Toronto is a single-tier municipality, so the City of Toronto issues building permits and carries out inspections directly.
• You apply to the City's building division, which reviews the application and drawings against the Ontario Building Code and City requirements.
• Zoning is also administered by the City, so a project that does not meet zoning may need a minor variance through the City's committee of adjustment.

Renovating in Durham Region

• Durham is a two-tier region, and building permits come from your LOWER-tier local municipality — the Town of Whitby, City of Oshawa, Town of Ajax, City of Pickering, Municipality of Clarington, Township of Scugog, Township of Uxbridge, or Township of Brock.
• The Region of Durham handles regional servicing such as water and sewer, not your renovation's building permit.
• You apply to your town or city's building department, which reviews and inspects against the same Ontario Building Code.
• Zoning is administered by your local municipality, so variances go through that municipality's process.

The process is broadly the same

• Determine whether the work needs a permit — structural, plumbing, and electrical changes usually do; a like-for-like cosmetic refresh often does not.
• Prepare and submit an application with drawings to the correct municipality.
• The building department reviews it against the Ontario Building Code and zoning.
• The permit is issued, work proceeds, and inspections happen at defined stages.
• A final inspection closes the permit. Electrical work anywhere in Ontario is separately done by an ECRA/ESA-licensed electrician and inspected by the ESA.