What the price covers
Lowering the basement floor for more headroom on a typical GTA house: digging below the footings, new footings and a new floor slab, with the engineering.
This is the extra on top of finishing the basement, not the price of a whole renovation.
Basic, mid-range and premium
The same range split by finish level, as the basement calculator does: the lower half, the middle and the upper half of the published range.
| Project | Basic | Mid-range | Premium |
|---|---|---|---|
| Underpinning median of 8 companies | $32,500 – $59,000 | $45,500 – $72,000 | $58,500 – $85,000 |
What each company publishes
The 8 GTA companies behind this range, cheapest first, in their own words. Our range is the middle (median) of their lows and highs.
| Company | Their price | What their page says |
|---|---|---|
| Leedway Group (Toronto) | $30,000 – $60,000 | “Underpinning adds $30,000–$60,000 before any wall goes up.” |
| The Renovators of Canada (Markham / Toronto) | $30,000 – $60,000 | “Underpinning alone can add $30,000 to $60,000+ depending on the size of the basement and the depth required.” |
| Adept Renovation and Painting (Toronto) | $30,000 – $80,000 | “Underpinning (excavating below existing footings): $30,000-$80,000+” |
| BCR Basements (Durham Region / Toronto) | $30,000 – $80,000 | “Underpinning in the GTA adds $30,000 to $80,000+ depending on scope.” |
| RenoEthics (Richmond Hill / GTA) | $35,000 – $90,000 | “Underpinning (adding ceiling height) — $35,000 to $90,000” |
| Leo Constra (Toronto) | $40,000 – $90,000 | “Underpinning, if the ceiling is too low: $350–$480 per linear foot, with typical Toronto projects at $40,000–$90,000 on top of the finishing budget.” |
| Maserat Developments (Toronto) | $60,000 – $120,000 | “Underpinning (excavating below footing, new concrete footing, lower floor slab): $60,000 – $120,000 for a standard footprint” |
| Desire Basements (Toronto) | $60,000 – $120,000 | “Full-perimeter underpinning $60,000 to $120,000 Engineering and a new slab included.” |
Prices read on each company’s own page; newest read Oct 15, 2026. This is a budget range, not a written estimate or quote. Your exact price comes in a written estimate after a free in-home visit.
Our promise on every job
- Fixed price. Your written price won’t go up unless you sign a change.
- Finish date in writing. Late? We take $100 a day off your final payment.
- 10% to book. Then pay for each stage as it starts. Never more than one stage ahead.
- 5-year warranty. On our workmanship, in writing.
More basement prices
- Legal basement apartment$102.50 – $127.50 per sq ftMid-range
- Basement finishing$40 – $50 per sq ftMid-range
- Separate entrance (walk-up)$21,000 – $27,000Mid-range
- Basement bathroom$17,500 – $22,500Mid-range
- Egress (escape) window$3,700 – $5,500 per windowMid-range
- Your own basementAnswer a few questions for your range. No email needed.
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