Basement Underpinning Cost in Old Toronto / York

For the Old Toronto / York permit sample, the median declared construction value was $60,000 across 310 qualifying permits. Half of declarations fell between $40,000 and $147,500. These values were declared on City of Toronto building permits filed between 2024 and 2026; project scope varies, and they are not contractor quotes or final spending. The area is grouped by postal code rather than an exact municipal boundary, and the sample covers permits that mention underpinning or lowering a basement floor.

This page covers Old Toronto / York only. See basement underpinning costs across all of Toronto for the citywide median and the full sample.

Explore underpinning permit values for your property type

Property type and an optional postal code can narrow the permit sample. The result is not a quote or a prediction of final spending.

What kind of property is it?

Postal code optional

Only the first three characters are used.

Pick a property type to see the range. Across all 310 permits the median declared construction value is $60,000. Scope varies between declarations, and the record does not contain final spending.

What affects basement underpinning cost?

Depth, site access and the condition of the existing foundation can change the work a contractor proposes. These permit records do not consistently give the lowering depth or itemized scope, so they cannot establish a typical depth or a cost multiplier for lowering further.

Questions to compare in written quotes

What finished ceiling height is proposed, and what engineering review is included?
Which structural work, excavation, new slab and drainage are included?
Who handles permits, inspections, waterproofing and finishing?

What the permit record does not tell us

The record provides one applicant-declared construction value, not an itemized scope or final invoice. For underpinning, it does not consistently show whether engineering, fees, waterproofing or finishing are included. Confirm each item in a written quote.

Compare with declared permit values

Enter a quote to place it on the full Old Toronto / York sample of 310 basement underpinning permits. This does not use the property selection above or judge whether the quote is high or low.

Based on 310 permits issued in 2024–2026. The declarations do not consistently itemize scope and are not records of final spending.

25th percentile declared value

$40,000

Median declared construction value

$60,000

75th percentile declared value

$147,500

Half of these permit declarations fell between the 25th and 75th percentile values. Treat this as a description of the records rather than a price for your property.

Get a real quote for your property

We pass your details to a single vetted contractor who works your postal code. You will not be called by five companies, because we only ever sell a request once.

See how this compares across all categories. The Toronto Renovation Cost Report puts basement underpinning next to every other renovation category we publish — median declared value, sample size and the change against the previous two years, in one table.