Permits are required for structural changes including wall removal or additions, electrical work beyond simple fixture replacement, plumbing modifications or relocations, HVAC system changes, basement underpinning or finishing, and exterior modifications affecting the building envelope. Basic permits cost $500-$1,500 while complex projects may reach $5,000+. Our team handles all permit applications, drawings, and approvals, ensuring compliance with Toronto Building Code and avoiding costly delays or fines.