What Toronto Homebuyers Need to Know About Open Building Permits

Toronto's real estate market moves fast. Offers go in within days, conditions get waived, and buyers close on properties without ever checking what the municipal record actually shows. One of the most consequential — and most overlooked — items in that record is the open building permit.

What Is an Open Building Permit in Toronto?

An open building permit means a permit was issued by the City of Toronto for construction or renovation work, but a final inspection was never completed. The work itself may have been done properly — but without a final sign-off from the city's building department, there is no official confirmation that it meets the Ontario Building Code.

The City of Toronto maintains over 232,000 building permit records dating back to 2000. These records include both active permits (currently in progress) and cleared permits (completed or cancelled). When a permit appears in the active records without a completion date, it is classified as open.

Why Open Permits Are Common in Older Toronto Homes

Toronto's older neighbourhoods have seen decades of renovation activity — basement underpinning, kitchen expansions, third-floor additions, secondary suite conversions. In areas like The Annex, Roncesvalles, Leslieville, and East York, it is not unusual to find permits pulled in the early 2000s that were never finaled.

Common reasons include contractors who completed the work but never scheduled the final inspection, homeowners who moved before the permit was closed, or renovations done in phases where the last stage was never formally signed off. In a city where pre-war housing stock dominates many of the most desirable neighbourhoods, this pattern is widespread.

What Happens If You Buy a Home With an Open Permit?

In Ontario, liability for an open building permit transfers to the new owner at closing. Unlike Alberta — where Property Proof also covers cities like Edmonton and Calgary — Ontario has no title insurance requirement that forces permit disclosure. Buyers are largely on their own when it comes to discovering open permits before closing.

The consequences can be significant. An open permit on a basement underpinning, for example, may mean the city has no record that the structural work was inspected. If you later apply for a renovation permit on the same property, the city may require the earlier work to be inspected — or in some cases, opened up for review — before issuing a new permit.

Insurance implications are also real. Some insurers may flag open permits as an underwriting concern, particularly for work that affects the building envelope or structural integrity. Mortgage lenders may raise it as a condition of financing.

How to Check for Open Permits Before You Offer

Toronto's official permit records are extensive but structured for municipal use, not for homebuyers. Interpreting permit status, distinguishing active from cleared records, and understanding what each classification means requires significant context.

Property Proof Toronto reports aggregate this data and classify each permit as Closed, Open, or Unknown. The report flags open permits prominently, so buyers can see at a glance whether a property has unresolved permit history — before drafting an offer.

Open Permits and Toronto's Pre-War Housing Stock

Toronto has one of the largest inventories of pre-war residential housing in Canada. Homes built in the 1900s through 1940s have often been renovated multiple times over their lifetime. Each renovation that required a permit creates a record — and if that record was never closed, it remains open indefinitely.

For buyers evaluating a century home in neighbourhoods like Cabbagetown, High Park, or Riverdale, checking permit history is not optional. It is a fundamental part of understanding what you are actually buying.

The tone here is not alarmist. Many open permits are benign — a deck permit from 2005 that was never formally closed, for instance. But some are not. A third-floor addition with no final inspection is a different conversation entirely. The point is to know before you offer, not after you close.