Underpinning vs Bench Footing: Lowering a Toronto Basement
Last updated: By Below-Grade Records Desk
Benching is the cheaper way to gain height, at $35 to $60 per square foot of basement floor against $50 to $80 for underpinning, which Nusite Group measures as roughly 30 to 40 per cent less. It is paid for in floor width: Strong Basements records 24 inches lost around the perimeter to a regular bench, or 12 inches to an engineered one. Underpinning loses none.
Once you have picked, WaterproofingIndex's own dataset holds 59 underpinning contractors across the Greater Toronto Area at an average Google rating of 4.91★ over 3,183 reviews (August 2026), so you can move straight from this verdict to a ranked shortlist of pros who do the work.
WaterproofingIndex reconciles conflicting contractor quotes by widening the range rather than picking a favourite, and reviews every figure before publishing.
Comparison
Underpinning or Bench footing: what actually differs?
Every price in this table names the Canadian source that published it, in the cell itself. Rows that carry no price are statements about how the two methods work, not claims about cost.
| Criterion | Underpinning | Bench footing |
|---|---|---|
| Cost per square foot of basement floor | $50–$80 (Nusite Group). On 1,000 sq ft lowered 2 ft that is $50,000–$80,000. | $35–$60 (Nusite Group). The same 1,000 sq ft works out to $35,000–$60,000. |
| Cost per linear foot at a 2 ft gain | $350–$480 for the structural work (Strong Basements); $200–$450 priced by depth gained, with $300 the average for the common 2 ft (Toronto Basement Underpinning) | From $300 for a regular bench and from $420 for an engineered bench (Strong Basements) |
| What happens to the footing | The existing footing is extended downward in sections, below the current floor. | A new footing is built inside the existing one, sitting on the basement side of the wall. |
| Floor area kept | All of it. The finished wall stays flush with the old one. | A ledge runs around the perimeter: 24 inches wide for a regular bench, 12 inches for an engineered bench (Strong Basements) |
| Whole-house project | Three worked Toronto quotes with HST: $88,132 for a semi at 107.5 linear ft, $117,859 for a Cabbagetown row house at 130 ft, $120,571 for an Etobicoke bungalow at 160 ft (Strong Basements) | No equivalent worked quote is published. Price it from the $35–$60 per sq ft or from-$300 per linear ft rates. |
| Engineering and permit | Structural drawings $2,000–$5,000 (Strong Basements); City of Toronto permit at $12.37 per linear metre with a $214.79 minimum fee, effective January 1, 2026 | Same permit class and the same fee. An engineered bench is by definition drawn by an engineer. |
| Usually priced with it | Waterproofing at $80–$120 per linear ft while the trench is open, against $150–$250 standalone later (Toronto Basement Underpinning); sump system $1,900–$2,500 (Strong Basements) | The same waterproofing and sump items apply; the floor slab is repoured either way. |
| All-in to an unfinished shell | $80–$100 per sq ft of basement floor, including engineering, permits, waterproofing, new plumbing and a new concrete floor (Strong Basements) | Not published as a separate all-in rate. The same scope applies minus the underpinning line. |
Contact
Which basements call for underpinning?
Underpin when the finished room has to be a full rectangle. It is the more expensive route at $50 to $80 per square foot of floor, but nothing is given back at the perimeter, which matters most in the narrow basements common in Toronto's older housing stock.
- The basement is narrow enough that losing 24 inches around the wall would make rooms unusable.
- You are finishing the space as living area and want full-height walls with no ledge to work around.
- The waterproofing is going in during the same dig at $80 to $120 per linear foot rather than $150 to $250 later (Toronto Basement Underpinning).
- You want a scope with published Toronto comparables: three worked whole-house quotes run $88,132 to $120,571 including HST (Strong Basements).
Contact
Which basements call for a bench footing instead?
Bench when the budget is the binding constraint and the floor plan can carry a ledge. Nusite Group prices benching 30 to 40 per cent under underpinning on the same job, and Strong Basements starts a regular bench at $300 per linear foot against $350 to $480 for underpinning.
- The basement is wide enough that 24 inches around the perimeter does not break the layout.
- You can use the ledge, for example as a base for built-ins, shelving or mechanical runs.
- An engineered bench at from $420 per linear foot halves the loss to 12 inches, which is often the middle option worth pricing (Strong Basements).
- The gain you need is modest. Toronto Basement Underpinning prices by depth gained, with $200 at 1 ft and $450 at 3 ft.
Prices
What does each cost on a real project?
Take a 1,000 square foot basement lowered by 2 feet, the scope Nusite Group prices both ways. Straight from the rows above:
- Underpinning, 1,000 sq ft lowered 2 ft
- $50,000–$80,000 (Nusite Group)
- Bench footing, same 1,000 sq ft lowered 2 ft
- $35,000–$60,000 (Nusite Group)
- Difference
- Roughly 30 to 40 per cent less to bench (Nusite Group)
- Floor width given back with a regular bench
- 24 inches around the perimeter (Strong Basements)
- Structural drawings, either route
- $2,000–$5,000 (Strong Basements)
- City of Toronto permit fee, either route
- $12.37 per linear metre, $214.79 minimum, from January 1, 2026
On this basement benching saves roughly $15,000 to $20,000 and takes 24 inches off every wall. Whether that is a good trade is a floor-plan question, not a price question: on a 20 foot wide basement a regular bench costs about a fifth of the width. Price the engineered bench too, since it halves the loss for a smaller premium than full underpinning.
Frequently asked questions
What is the difference between underpinning and bench footing?
- Underpinning extends the existing footing downward in sections, so the wall carries on straight to the new floor level and the room keeps its full width. A bench footing leaves the original footing where it is and builds a new one inside it, so a concrete ledge runs around the perimeter. Both lower the floor; only one keeps the floor plan.
How much cheaper is benching than underpinning in Toronto?
- Nusite Group prices basement lowering at $50 to $80 per square foot of basement floor by underpinning and $35 to $60 by benching, and states benching runs roughly 30 to 40 per cent less. On 1,000 square feet lowered 2 feet that is $50,000 to $80,000 against $35,000 to $60,000. Add 13% HST unless the quote already includes it.
How much floor space does a bench footing take?
- Strong Basements measures 24 inches of floor width lost to a regular bench and 12 inches to an engineered bench, priced from $300 and from $420 per linear foot respectively. The ledge runs the full perimeter of the benched walls, so on a narrow basement it is worth drawing on the floor plan before choosing.
Do I need a permit to lower a basement in Toronto?
- Yes. The City of Toronto charges $12.37 per linear metre of underpinning with a $214.79 minimum fee, effective January 1, 2026, and Strong Basements prices the structural drawings for the permit application at $2,000 to $5,000. The permit class and the fee are the same whether the floor is lowered by underpinning or by benching.
Questions to ask your contractor
- Are you quoting full underpinning or bench footing, and what does each one cost here? Underpinning versus bench footing
- How much finished ceiling height do I actually gain once the new slab is poured? Sourced per linear foot pricing
- Who is the engineer, and is the stamped drawing inside this price?
- How is the work sequenced so the house stays supported throughout?
- What is the plan for water now that the floor sits lower than it did?