Toronto's housing stock spans 1880s Victorian semis to 1980s detached homes, every era with a different foundation type and a different underpinning playbook. Our 20 crews work across all six City of Toronto wards. Toronto Basement Underpinning delivers basement underpinning, interior waterproofing, basement finishing, sump pump installation, concrete foundation repair, legal apartment conversions, walkout basements, and permit coordination - full scope, one licensed crew.
Neighbourhoods Served
The homeowners who contact Toronto Basement Underpinning are usually wrestling with one of these. We solve them properly - not with a quick fix that fails in two years.
Your Toronto Victorian semi or rowhouse has a 5'10"-6'4" basement, typical of 1880s-1920s housing stock. Finishing feels claustrophobic and a legal apartment is impossible at that height.
Original stone-and-rubble or brick foundations under pre-1900 Toronto homes show active settlement after a century of frost cycles. Patches keep failing because the underlying bearing problem continues.
Pre-WWII clay tile perimeter drains under Toronto-core homes are long past their service life. Spring melt brings water at the wall-floor cove every year.
City of Toronto plan review can stretch 8-12 weeks, with Heritage Conservation District overlays adding another layer in Cabbagetown, Riverdale, the Junction, and the core. We handle every form and every hearing.
Complete framing, rough-ins, drywall, flooring and trim to convert a raw basement into a legal apartment or luxury living suite. Available in Toronto as part of our full-turnkey underpinning service.
Exterior stairwell and door opening cut into your foundation wall, engineered to code, permitted, and waterproofed. Creates a private entrance for a legal basement suite or direct backyard access. Available in Toronto as part of our full-turnkey underpinning service.
Crack injection, footing repair, and structural reinforcement for Toronto homes, with an honest call on when full underpinning is the right answer instead. Available in Toronto as part of our full-turnkey underpinning service.
End-to-end drawings plus permit coordination, architect, structural engineer, City of Toronto submission, and Committee of Adjustment if zoning relief is needed. Available in Toronto as part of our full-turnkey underpinning service.
Full interior waterproofing of foundation walls, weeping tile, sump pit, and dimpled membrane, to stop leaks at the source. Available in Toronto as part of our full-turnkey underpinning service.
Underground plumbing, main drain replacement, and rough-ins for new bathrooms, most efficient when combined with underpinning or basement finishing. Available in Toronto as part of our full-turnkey underpinning service.
Primary plus battery backup sump pump systems sized for Toronto's freeze-thaw water table, eligible for the City of Toronto Basement Flooding Subsidy. Available in Toronto as part of our full-turnkey underpinning service.
Every Toronto underpinning project routes through the City of Toronto building department, with Heritage Conservation District overlays adding 6-8 weeks to plan review for homes in the Annex, Cabbagetown, Riverdale, and the Junction. We pre-screen heritage status during the estimate and submit drawings under the Master Permit framework so the structural engineer's stamp lands at the same time as the architectural set.
Engineered assessment at your Toronto property. Fixed-price quote within two business hours.
Architect, structural engineer, Toronto building permit submission. We handle every form and every hearing.
Pin-section excavation and pours in Toronto. Daily site cleanup. Engineered inspections at every milestone.
City sign-off, engineer's stamp, warranty documentation, finishing handoff if bundled in Toronto.
Free engineered assessment. Zero-risk, no-questions-asked warranty on every project.
Our 20 crews dispatch from across the city. We know the GO-DVP-Gardiner traffic windows, the city's overnight construction-vehicle rules, and the parking-permit process for narrow downtown streets. Most Toronto sites get a same-day site visit and a fixed-price quote within two business hours of the inquiry. Permit submissions go through the City of Toronto Building Department at City Hall and through the appropriate district office.
Toronto homes range from 1880s rubble-and-fieldstone Victorian semis with 5'10" basements, through 1920s-1950s brick foundations, to post-war concrete-block detached homes in the inner suburbs. Each era takes a different staging plan, a different excavation depth, and a different waterproofing detail. Our project managers have personally underpinned every one of these foundation types.
“1880s Cabbagetown rowhouse with a stone-and-rubble foundation no one else would touch. TBU underpinned in pin sections, kept the front-parlor walls pristine, and turned a 5'10" basement into a real 8-foot ceiling. City of Toronto permit through in six weeks.”
Sarah K.
Cabbagetown, Toronto
“Beaches semi on a classic narrow lot. The crew worked around the parking-permit quirks for the street and finished the underpinning plus interior waterproofing in five weeks. Basement stays bone-dry through every Lake Ontario humidity spike.”
Andrew M.
The Beaches, Toronto
“Trinity Bellwoods 1905 Victorian. We expected the foundation work to be brutal. The team's pin-section sequencing kept us in the upper floors the entire project. New 8-foot basement, full waterproofing, no surprise change orders.”
Vanessa H.
Trinity Bellwoods, Toronto
Free estimate within two business hours. Local crews, same-day estimate.
