Underpinning Permit

Underpinning involves strengthening or deepening an existing foundation, typically to add basement space, repair settlement issues, or accommodate adjacent construction. In Toronto and the GTA, underpinning work requires a building permit because it affects the structural integrity of your home and may impact neighbouring properties. The permit process involves detailed structural drawings, soil reports, and engineered shoring plans. Toronto Building reviews these submissions to ensure the work meets Ontario Building Code requirements and won't destabilize your home or adjacent structures. Many underpinning projects also trigger requirements for Party Wall Agreements if work occurs near a property line. PermitsHub manages the technical documentation, coordinates with your structural engineer, and navigates the submission process so your underpinning project starts on solid regulatory ground.

• Basement lowering and benching to increase ceiling height
• Foundation deepening for additional living space
• Foundation repair due to settlement or structural damage
• Underpinning required for adjacent new construction
• Shoring and support system approvals
• Party Wall Notice coordination when work affects neighbours