# Basement Underpinning Markham | TBU URL: https://torontobasementunderpinning.ca/service-areas/markham/ ![](/images/misc/indoor-finished-basement-service-areas-hero.webp) Next-day estimate · City of Markham # Basement Lowering & Underpinning in Markham, ON 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 lowering, underpinning, interior waterproofing, basement finishing, sump pump installation, concrete foundation repair, legal apartment conversions, walkout basements, and permit coordination - full scope, one licensed crew. A typical Markham basement lowering runs $20,000-$50,000 depending on foundation depth, soil condition, and whether waterproofing and finishing are included in the same project. Every quote is fixed-price, includes engineered drawings and city permits, and is backed by our workmanship warranty. Toronto Basement Underpinning serves basement lowering and underpinning across Markham and the Greater Toronto Area, including Toronto, North York, Scarborough, Etobicoke, Mississauga, and Brampton. Get a Free Markham Estimate [/contact/ →](/contact/) Call (416) 900-3329 [tel:+14169003329 →](tel:+14169003329) Neighbourhoods Served UnionvilleCornellAngus GlenWismerCathedraltownMarkham VillageBerczyGreensboroughAileen-WillowbrookButtonvilleThornhill Licensed & Insured Free Estimate Within 2 Hours Workmanship Warranty on Every Project GTA-Wide Service Common Problems ## Markham Basement Issues? Expert Help Available 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. ### Cramped Ceiling Height 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. ### Cracked Foundation Walls 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. ### Leaking Basement 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. ### Stalled By Permits 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. Our Services ## Our Services for York Region Homes ![Basement Finishing](/images/hero/newly-finished-toronto-basement-suite-with-full-ki.webp) ### Basement Finishing 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. [Basement Finishing →](/basement-finishing/) ![Basement Lowering](/images/hero/toronto-technician-inspecting-vertical-foundation-.webp) ### Basement Lowering Full basement floor excavation and underpinning to gain 1-3 feet of ceiling height. Fixed-price contract includes engineer drawings, city permits, and concrete restoration. Available in Markham as part of our full-turnkey underpinning service. [Basement Lowering →](/basement-lowering/) ![Basement Walkout](/images/generated/walkout-exterior-entrance-toronto-home.webp) ### Basement Walkout 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. [Basement Walkout →](/basement-walkout/) ![Concrete & Foundation Repair](/images/hero/toronto-technician-inspecting-vertical-foundation-.webp) ### Concrete & Foundation Repair 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. [Concrete & Foundation Repair →](/concrete-foundation-repair/) ![Drawings & Building Permits](/images/hero/architectural-drawings-spread-across-desk-with-str.webp) ### Drawings & Building Permits 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. [Drawings & Building Permits →](/drawings-permits/) ![Interior Basement Waterproofing](/images/hero/toronto-technician-installing-weeping-tile-along-e.webp) ### Interior Basement Waterproofing 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. [Interior Basement Waterproofing →](/interior-waterproofing/) ![Plumbing & Drain Services](/images/hero/toronto-plumbing-crew-installing-new-pvc-main-drai.webp) ### Plumbing & Drain Services 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. [Plumbing & Drain Services →](/plumbing-drain-services/) ![Sump Pumps & Battery Backups](/images/hero/toronto-technician-installing-sealed-sump-pit-with.webp) ### Sump Pumps & Battery Backups 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. [Sump Pumps & Battery Backups →](/sump-pumps/) How It Works ## How Our Markham Service Works 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. Step 1 ### Free Site Visit Engineered assessment at your Markham property. Fixed-price quote within two business hours. Step 2 ### Drawings & Permits Architect, structural engineer, Markham building permit submission. We handle every form and every hearing. Step 3 ### Staged Construction Pin-section excavation and pours in Markham. Daily site cleanup. Engineered inspections at every milestone. Step 4 ### Inspection & Handover City sign-off, engineer's stamp, warranty documentation, finishing handoff if bundled in Markham. ## Ready for a Free Markham Estimate? Free engineered assessment. Workmanship warranty on every project. Book Free Estimate [/contact/ →](/contact/) Call (416) 900-3329 [tel:+14169003329 →](tel:+14169003329) Local Expertise ## Why York Region Homeowners Choose Us City of Markham permit coordinator on staff York Region framework familiarity Unionville heritage-overlay coordination Cornell and Cathedraltown new-construction-era underpinning experience ## Markham Landmarks We Work Near Markham Civic CentreMain Street Unionville ## Our Service Area in Markham Services in Markham ## Basement & Foundation Services in Markham Markham property owners bundle multiple basement scopes on one fixed-price contract. All 8 services below price at published York Region rates. Markham ### Basement Underpinning in Markham Basement underpinning (also called basement lowering or foundation underpinning) is full basement floor excavation with pin-by-pin concrete underpinning to gain 1-3 feet of ceiling height. Fixed-price contract includes architect drawings, structural engineer stamp, and building permit coordination. From $20,000 [Basement Underpinning in Markham →](/basement-underpinning/markham/) Markham ### Basement Finishing in Markham Complete basement finishing after underpinning or waterproofing is done: framing, insulation, drywall, flooring, kitchen and bath rough-ins, trim, and paint. Full turnkey suite build ready for occupancy inspection. From $35,000 [Basement Finishing in Markham →](/basement-finishing/markham/) Markham ### Interior Waterproofing in Markham Interior weeping tile replacement along the foundation perimeter, new sump pit and battery-backup sump pump, Delta-MS drainage membrane on interior walls, and hydrophobic polyurethane crack injection where required. From $6,000 [Interior Waterproofing in Markham →](/interior-waterproofing/markham/) Markham ### Concrete Foundation Repair in Markham Hydrophobic polyurethane crack injection for active water leaks, epoxy structural crack repair, carbon fibre stitching for shifting walls, and full wall stabilisation systems for bowed or leaning foundation walls. From $400 [Concrete Foundation Repair in Markham →](/concrete-foundation-repair/markham/) Markham ### Drawings & Permits in Markham Complete architect site plan drawings, structural engineer stamped footing and beam details, and municipal building permit application coordination for basement underpinning, finishing, and second-suite conversion projects. From $2,500 [Drawings & Permits in Markham →](/drawings-permits/markham/) Markham ### Sump Pumps in Markham Sump pit excavation, primary submersible sump pump installation, battery-backup secondary pump for power outages, and city-approved backwater valve installation for basement flood prevention. From $800 [Sump Pumps in Markham →](/sump-pumps/markham/) Markham ### Plumbing & Drain Services in Markham Basement rough-in plumbing for kitchen and bath in second-suite conversions, drain camera inspection for existing sanitary lines, backflow prevention valve installation, and municipal service connection coordination. From $1,500 [Plumbing & Drain Services in Markham →](/plumbing-drain-services/markham/) Markham ### Basement Walkout in Markham Basement walkout entrance construction: exterior excavation, engineered retaining walls, waterproof stair landing, insulated exterior door frame, drainage tie-in, and weather-sealed threshold for legal second-suite egress. From $12,000 [Basement Walkout in Markham →](/basement-walkout/markham/) Testimonials ## What Markham Homeowners Say “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 Got Questions? ## Markham Underpinning Questions Do you handle Markham heritage overlays? Yes. Main Street Unionville and parts of historic Markham have heritage overlays. We coordinate the heritage permit alongside the building permit when visible exterior work is needed. How is Markham different from Toronto for permits? Markham operates under York Region with its own building department. Plan review timelines are typically 4-6 weeks; fees and inspection cadence differ from Toronto. Our permit coordinator handles it. What's typical project size in Markham? Markham detached homes are usually larger than Toronto's, and project budgets follow. Underpinning typically $30,000-$55,000, often paired with premium finishing. Nearby Areas ## Also Serving ### North York City of Toronto (North York) [North York →](/service-areas/north-york/) ### Richmond Hill City of Richmond Hill [Richmond Hill →](/service-areas/richmond-hill/) ![](/images/cta/indoor-underpinning-crew-cta-bg.webp) Typical Response Time: 2 Hours ## Book Your Markham Basement Assessment Free estimate within two business hours. Local crews, next-day estimate. Get a Free Estimate [/contact/ →](/contact/) Call (416) 900-3329 [tel:+14169003329 →](tel:+14169003329) Written Workmanship Warranty Licensed & Insured Structural Engineer Coordination