Interior of a house under construction with unfinished walls, wiring hanging from the ceiling, and construction materials present, leading to a sliding glass door at the back.

Build once. Build right.

Underpinning, waterproofing, and concrete—done on schedule.

Services

  • Underpinning

    Underpinning

    Increase ceiling height and strengthen your structure with engineered, staged underpinning. We handle permits/inspections and keep projects moving safely and on schedule.

  • Excavation

    Excavation

    Tight‑access and bulk excavation for additions, walkouts, underpinning, and drainage. We handle utility locates, shoring/benching coordination, haul‑away and backfill/compaction, and final grading so your site is ready for formwork or waterproofing.

  • Waterproofing

    Waterproofing

    Stop leaks and keep basements dry with exterior or interior systems—membranes, weeping tile, and sump solutions. We diagnose the source and install the right fix the first time.

  • Basement Walkout

    Basement Walkout

    Code‑compliant exterior entrances from excavation to concrete stairs, retaining walls, drainage, and finishing. Clean sites and coordinated permits to minimize disruption.

  • Addition

    Addition

    Foundations for home additions, including footings, walls, and any required underpinning of existing structures. We align with your GC’s schedule and engineer’s details.

  • Concrete Slab

    Concrete Slab

    New or replacement slabs for basements, garages, and walkouts with proper base prep, vapor barrier, and reinforcement. Flat, durable finishes—radiant‑ready on request.

  • Concrete Foundation Services

    Concrete Foundation

    Formed and poured foundations, footings, pads, and retaining walls built to spec and elevation. Integrated drainage and waterproofing for long‑term performance.

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Projects

  • Briar Hill

    Staged underpinning to safely lower the basement and add clear headroom. New foundation for the rear addition with tied‑in perimeter/floor drains to a sump. Reinforced slab with proper base prep and vapor barrier for a dry, finish‑ready space.

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  • Oakwood

    Underpinning to stabilize and lower the existing basement, plus foundations for the rear addition. We installed perimeter and floor drains, poured a reinforced slab, and built a code‑compliant exterior walkout with proper grading and drainage. Clean site, minimal disruption.

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  • Bloor

    Excavation and foundation prep for a rear addition, coordinated with existing elevations. Waterproofing integrated with new drainage to keep the envelope dry. Reinforced, level slab placed to spec and ready for framing.

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  • Knight

    A hybrid approach using bench footings and staged underpinning to achieve height while protecting adjacent structures. New perimeter/floor drains tied to a sump for reliable moisture control. Reinforced slab with vapor barrier for long‑term performance.

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  • Albany

    Basement lowering via engineered underpinning, then a code‑compliant walkout with concrete stairs and retaining wall. Weeping tile and floor drains manage water at the source. New reinforced slab delivers a clean, level base for finishes.

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  • Construction site with freshly poured concrete floor, partially finished walls, and exposed wooden beams on ceiling.

    Glenvale

    Staged underpinning stabilized and lowered the existing basement while we prepared the foundation for a rear addition. We installed exterior waterproofing with weeping tile tied to a sump to manage groundwater. A compacted base, vapor barrier, and reinforced concrete slab delivered a dry, level, finish‑ready space.

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  • Construction workers building concrete stairs on a construction site.

    Marlborough

    Engineered underpinning lowered and stabilized the existing foundation to unlock usable ceiling height. We built a code‑compliant exterior walkout with concrete stairs and a dedicated areaway drain. New perimeter/floor drains tie into the sump, and a reinforced slab over vapor barrier delivers a dry, level, finish‑ready basement.

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What Our Clients Say

  • "Sahand and crew were awesome. Hugely Professional quality basement underpinning. Always on time, extremely neat, extremely hard working, never quit. Job was challenging, but they were extremely positive, reliable and never defeated by the job’s difficulties which were many. We would unreservedly recommend Bonikar Building Solutions!!"

    Helen Walters

  • "Bonikar helped me with underpinning our house and they are experienced, helpful, and met my expectations. Very satisfied with the results to have a higher basement ceiling height and have recommended to a friend."

    Derrick Lai

  • "We contracted Hans and the team at Bonikar to help us through a difficult home renovation during covid. Hans was always on time, delivered as promised and his quotes were always fair, reasonable and justified. He advocated on our behalf with other contractors, and ensured all work done was up to his and our satisfaction."

    Steven Osiel

Trusted by Builders & Homeowners Since 2015

We partner with general contractors and homeowners on underpinning, waterproofing, walkouts, additions, and concrete work. Our crew keeps sites clean, documents progress, and stays aligned to schedules and details—reducing RFIs, surprises, and downtime. We coordinate with engineers and inspectors and flag constructability issues early so your job keeps moving.

Since 2015, we’ve delivered structural work across Toronto and the GTA with predictable timelines and transparent pricing. Expect clear scopes, milestone check‑ins, and photo‑logged progress that makes coordination easy for builders and confidence‑inspiring for homeowners. If you’re planning a basement lowering, walkout, or addition foundation, we’re ready to slot into your schedule and get it done right.

New glass and metal railing installed on a basement stairway outside a brick house, with fall leaves on the ground.