Underpinning
Lowering your basement is one of the most complex and high-risk types of renovation. We
provide fully engineered underpinning plans that allow you to gain ceiling height and usable
space while ensuring structural safety and full municipal compliance. Whether you’re planning
a legal basement suite or simply want more room, our team manages everything — from
technical design to city approval and on-site inspections.
• Structural assessment of existing foundation and floor slab
• Engineering design of underpinning sequence and reinforcement
• Drawings showing excavation pits, wall sections, slab, drainage
• Permit-ready package with structural notes and phasing
• Application to the city and response to examiner comments
• Engineer’s inspections and sign-off during construction (as required)
Why choose us
We don’t just draw — we calculate, coordinate, and take responsibility. Underpinning errors can
cause serious damage. That’s why we provide fully staged, code-compliant drawings backed by engineer supervision, so you can build confidently from the ground down.