Basement Renovation: Cost in Quebec 2026

Finishing a basement adds 30-50% of livable space for a fraction of an extension cost.

Costs by finish level

• Basic ($40-60/sq ft): Insulation, drywall, floating floor, basic lighting
• Mid-range ($60-85/sq ft): Add 3-piece bathroom, better floors, recessed lighting
• High-end ($85-120/sq ft): Full bathroom, kitchenette, heated floor, premium finishes