Unionville's heritage homes, Cathedraltown's 2000s detached builds, and Cornell's new-urbanist stock each have different basement profiles - and York Region plan review runs 4-6 weeks through the City of Markham building department, faster than Toronto core. 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.
Old Markham 1960s bungalows in Unionville have 6'6" basements. Newer 2000s infill in Cathedraltown and Berczy Village runs 7'0"+, but most are still unfinished. Underpinning enables a legal lower level.
Heritage-era stone foundations under Unionville Main Street homes show settlement on York Region clay. Newer subdivision homes settle differently but show their own cracking pattern after 15-20 years.
Older Markham core homes have failing perimeter drains. Newer Cathedraltown and Berczy Village builds occasionally show under-slab hydrostatic pressure that no surface waterproofing addresses.
Markham heritage overlays cover Unionville Main Street and parts of Old Markham. York Region permits run 4-6 weeks plan review. Our coordinator pre-screens every project.
Complete framing, rough-ins, drywall, flooring and trim to convert a raw basement into a legal apartment or luxury living suite. Available in Markham 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 Markham 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 Markham 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 Markham 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 Markham 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 Markham 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 Markham as part of our full-turnkey underpinning service.
Markham projects go through the City of Markham building department under York Region authority. Unionville Main Street and parts of Old Markham fall under heritage overlays adding 4-6 weeks to plan review; our coordinator pre-screens heritage status during the estimate and pulls the heritage permit alongside the building permit.
Engineered assessment at your Markham property. Fixed-price quote within two business hours.
Architect, structural engineer, Markham building permit submission. We handle every form and every hearing.
Pin-section excavation and pours in Markham. Daily site cleanup. Engineered inspections at every milestone.
City sign-off, engineer's stamp, warranty documentation, finishing handoff if bundled in Markham.
Free engineered assessment. Zero-risk, no-questions-asked warranty on every project.
“Unionville Main Street heritage home in Markham. The City of Markham heritage overlay scared off three other contractors. TBU's coordinator pulled the heritage permit in seven weeks, underpinned the basement, and respected every original detail.”
Wendy L.
Unionville, Markham
“Cathedraltown 2010-built Markham home. The basement was deep but unfinished. Underpinning was not needed. TBU did interior waterproofing and a sump system instead. They told me up front the underpinning was unnecessary. Honest call, saved us thirty grand.”
Edmund C.
Cathedraltown, Markham
“Berczy Village newer Markham detached. Underpinning to give us full ceiling height for a basement gym. The York Region permit process was quicker than I expected. The crew was respectful of the family schedule for our two young kids upstairs.”
Yi-Chen W.
Berczy Village, Markham
Free estimate within two business hours. Local crews, next-day estimate.
