20 dedicated crews. Drawings, permits, lowering, waterproofing, and finishing. All under one roof.
Add livable square footage. Build a legal apartment. Fix a real structural problem. Backed by our zero-risk, no-questions-asked warranty.
The Toronto homeowners we work with are usually wrestling with one of these. We solve them properly — not with a quick fix that fails in two years.
Your basement ceiling is under 7 feet, finishing the space feels claustrophobic, and a legal apartment is impossible at that height.
Recurring or stair-step cracks signal active settlement. Patches keep failing because the underlying bearing problem continues.
Water at the wall-floor cove every spring. The original weeping tile is clogged, cracked, or just aged out.
The City of Toronto building permit, structural engineering, and Committee of Adjustment process feels like a maze.
Address all four with one project, one warranty, one project manager.
Get a Free Engineered AssessmentUnderpinning is the structural backbone. Most projects bundle waterproofing, sump pumps, drawings, and finishing into one continuous job.
Complete framing, rough-ins, drywall, flooring and trim to convert a raw basement into a legal apartment or luxury living suite.
$30,000 –$90,000
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Crack injection, footing repair, and structural reinforcement for Toronto homes — with an honest call on when full underpinning is the right answer instead.
$600 –$8,000
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End-to-end drawings plus permit coordination — architect, structural engineer, City of Toronto submission, and Committee of Adjustment if zoning relief is needed.
$2,500 –$7,500
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Full interior waterproofing of foundation walls — weeping tile, sump pit, and dimpled membrane — to stop leaks at the source.
$8,000 –$25,000
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Primary plus battery backup sump pump systems sized for Toronto's freeze-thaw water table — eligible for the City of Toronto Basement Flooding Subsidy.
$1,800 –$4,500
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Underground plumbing, main drain replacement, and rough-ins for new bathrooms — most efficient when combined with underpinning or basement finishing.
$1,500 –$12,000
Learn More →20+ years specializing in Toronto basement underpinning. 20 active crews — the largest dedicated underpinning workforce in the GTA. Drawings, permits, structural engineering, waterproofing, and finishing all coordinated in-house.
Most Toronto specialists quote 6+ months out. Our scheduling capacity means weeks, not months.
Architect, engineer, City of Toronto plan review, excavation, waterproofing, finishing — one team, one quote.
Every project carries an engineered design from an Ontario-licensed structural engineer. No improvisation.
If something covered fails, we return and resolve it. No contract scavenger hunt.
Engineered assessment on your property. Fixed-price quote within two business hours.
Architect, engineer, City of Toronto submission. We handle every form and every hearing.
Pin-section excavation and pours. Daily site cleanup. Engineered inspections at every milestone.
City sign-off, engineer's stamp, warranty documentation, finishing handoff if bundled.
Free engineered assessment. Honest answer, even when it isn't underpinning.
“We finally finished our 1920s Annex basement after underpinning lowered the slab to a real 8-foot ceiling. The crew warned us about every dust event in advance, swept the site daily, and finished a week ahead of the engineered schedule.”
Megan R.
The Annex, Toronto
“Bought a North York bungalow specifically to legalize a basement apartment. TBU handled drawings, the City of Toronto permit, structural engineering, and the finishing. Tenant moved in two months after the pour cured. Zero callbacks since.”
Daniel T.
North York, Toronto
“We had three contractors quote our Leslieville semi. TBU was the only one who explained the shared-wall sequencing and walked our neighbour through the process before booking. Underpinning, waterproofing, and a sump pump done in five weeks.”
Priya S.
Leslieville, Toronto
“Forest Hill home, full underpinning plus high-end finishing. The drawings were thorough, the engineer's site visits were on schedule, and the crew respected the original mouldings on the upper floors. Pricing was exactly what was quoted — no surprise change orders.”
Charles W.
Forest Hill, Toronto
“We had a chronic leak that the previous waterproofer never solved. TBU diagnosed hydrostatic pressure under the slab, installed new weeping tile and a battery-backup sump. Bone dry through this year's spring melt. Worth every dollar.”
Olu A.
Etobicoke, Toronto
Plug in your foundation perimeter, target ceiling height, and any add-ons (waterproofing, sump pump, finishing) — our estimator gives you a calibrated range based on 20+ years of Toronto underpinning pricing data.
Use Free EstimatorEstimates only. Use the calculator for your specific inputs.
Toronto, North York, Etobicoke, Scarborough, York, East York, Mississauga, Brampton, Markham, Vaughan, Richmond Hill, Oakville, Burlington, Pickering and surrounding regions.
Want to understand the engineering, the City of Toronto permit process, or the real provincial pricing before booking an estimate? Browse our Toronto basement underpinning guides — written for homeowners, no marketing fluff.
Read the Guides
Free estimate within two business hours. Engineered. Fixed-price. Zero-risk warranty.
